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Clerk to Lower Allithwaite Parish Council South Lakeland District Council Lower Allithwaite Parish Council South Lakeland House Mr P Turner Lowther Street Sunnyside Kendal Holme Lane Cumbria LA9 4DL Allithwaite GRANGE over SANDS Tel: 01539 733333 LA11 7QD www.southlakeland.gov.uk

Our Ref: SL/2018/0694 Your Ref: Date: 6 August 2018

Dear Sir

LOCATION: Kirkhead Tower (Kirkhead Summer House), South Side, Kirkhead Road, GEOCODE: Easting: 339267 Northing: 475636 DEVELOPMENT: Repair works to folly, including localised rebuilding, repointing and lead capping. REFERENCE NUMBER: SL/2018/0694 (Please use this whenever you contact us) PLANNING OFFICER: Chris Harrison

We have received the above application that you may wish to comment upon. The following link will take you directly to the application: http://kdc- pam.southlakeland.gov.uk/AniteIM.websearch/ExternalEntryPoint.aspx?SEARCH_TYPE=1&DOC _CLASS_CODE=DC&folder1_ref=SL/2018/0694 Or go to our website: http://applications.southlakeland.gov.uk/planningapplications/welcome.asp to view the documents. Please send your comments by email: [email protected] before 22 days (28 August 2018). If you do not reply within that period I will assume you have no comments.

Yours faithfully

Chris Harrison Development Management A Not to scale Section A-A Scale 1:50 Ariel View detail 09/01 A Detail 09/01 Not to scale OS Map Scale 1:5 Lead wall head capping Lead cover flashing H71/250A layer of smooth render applied to illustrated. areas where lead is to be fixed as Wall top to be consolidated and Kirkhead Tower H71/420 Location Plan Scale 1:2500

Def

49 CW Kirkhead Summer House 43 Cottages Kirkhead Kents Bank Kirkhead Tower Repair and Conservation 18051 Morcambe Bay Partnership REV PROJECT REPRODUCED IN WHOLE OR PART ANY MANNER FORM WITHOUT PRIOR PROPERTY OF JOHN COWARD ARCHITECTS LTD, AND MUST NOT BE COPIED OR Wall Capping Detail CONSENT OF THE COMPANY. COPYRIGHT ON ALL DRAWINGS, SPECIFICATION AND DOCUMENTATION REMAINS THE CLIENT 1:5 / 1:50 THE ARCHITECT. DO NOT SCALE FROM THIS DRAWING. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS ON JOB BEFORE STARTING JOB NO TITLE WORK OR PREPARING SHOP DRAWINGS. ANY DISCREPANCIES MUST BE REFERRED TO A SCALE/

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34 FF Fax : (015395) 36775 Ford Road, No. 3 Unsworth's Yard, Cumbria, LA11 6PG Cartmel, CHECKED Tel : (015395) 36596 www.johncowardarchitects.co.uk JOHN COWARD ARCHITECTS LIMITED -

25 41.6m

21 REVISION 29-05-2018 DATE A

BY dk

22 37.5m DATE 03-08-2018

11 to 3 Specification

Repair and Consolidation Works Kirkhead Tower

May 2018 Ref. 18051/sp

Revision Comment Date

John Coward Architects Limited No.3 Unsworth’s Yard Ford Road Cartmel Cumbria LA11 6PG

Telephone: (015395) 36596 Fax: (015395) 36775 E:mail: [email protected] Table of Contents

Title Page

C41 Repairing/ Renovating/ Conserving masonry 2

F31 Precast concrete sills/ lintels/ copings/ features 5

H71 Lead sheet coverings/ flashings 6

Q23 Gravel/ Hoggin/ Woodchip/ Resin bound roads/ 9 pavings/ overlays

Z21 Mortars 10

Z22 Sealants 11 18051 Kirkhead Tower - Specifiation C41 Repairing/ Renovating/ Conserving masonry

C41 Repairing/ Renovating/ Conserving masonry

To be read with Preliminaries/ General conditions

GENERALLY/ PREPARATION

110 SCOPE OF WORK • Schedule: Consolidation and repointing of walls. • Records of masonry to be repaired: Before starting work, use measurements and photographs as appropriate to record bonding patterns, joint widths, special features, etc. • Identification of masonry units to be removed, replaced or repaired: Mark clearly, but not indelibly, on face of masonry units or parts of units to be cut out and replaced. Transcribe markings to drawings/ photographs.

120 SITE INSPECTION • Purpose: To confirm type and extent of repair/ renovation/ conservation work shown on drawings and described in survey reports and schedules of work. • Parties involved: Architect and Foreman mason. • Timing: As soon as scaffolding is handed over. • Instructions issued during inspection: To be confirmed by Architect.

130 REMOVAL OF PLANT GROWTHS FROM MASONRY • Plants, root systems and associated soil/ debris: Carefully remove from joints, voids and facework. • Removal of roots: Where growths cannot be removed completely without disturbing masonry seek instructions. • Unwanted plants close to masonry: Where removal of root system is not possible or desirable, cut through stem as close to the ground as possible. Remove bark from stump and apply herbicide paste. Leave stump to wither.

WORKMANSHIP GENERALLY

150 POWER TOOLS • Usage for removal of mortar: Not permitted.

155 PUTLOG SCAFFOLDING • Usage: Not permitted.

160 PROTECTION OF MASONRY UNITS AND MASONRY • Masonry units: Prevent overstressing during transit, storage, handling and fixing. Store on level bearers clear of the ground, separated with resilient spacers. Protect from adverse weather and keep dry. Prevent soiling, chipping and contamination. Lift units at designed lifting points, where provided. • Masonry: Prevent damage, particularly to arrises, projecting features and delicate, friable surfaces. Prevent mortar/ grout splashes and other staining and marking on facework. Protect using suitable nonstaining slats, boards, tarpaulins, etc. Remove protection on completion of the work.

165 STRUCTURAL STABILITY • General: Maintain stability of masonry. Report defects, including signs of movement that are exposed or become apparent during the removal of masonry units.

170 DISTURBANCE TO RETAINED MASONRY • Retained masonry in the vicinity of repair works: Disturb as little as possible. • Existing retained masonry: Do not cut or adjust to accommodate new or reused units. • Retained loose masonry units and those vulnerable to movement during repair works: Prop or wedge so as to be firmly and correctly positioned.

180 WORKMANSHIP • Skill and experience of site operatives: Appropriate for types of work on which they are employed. - Documentary evidence: Submit on request.

Page 2 of 11 18051 Kirkhead Tower - Specifiation C41 Repairing/ Renovating/ Conserving masonry

185 ADVERSE WEATHER • General: Do not use frozen materials or lay masonry units on frozen surfaces. • Air temperature: Do not bed masonry units or repoint: - In cement gauged mortars when ambient air temperature is at or below 3°C and falling or unless it is at least 1°C and rising, unless mortar has a minimum temperature of 4°C when laid and the masonry is adequately protected. - In hydraulic lime:sand mortars when ambient air temperature is at or below 5°C and falling or unless it is at least 3°C and rising. - In nonhydraulic lime:sand mortars in cold weather, unless approval is given. • Temperature of the work: Maintain above freezing until mortar has fully set. • Rain, snow and dew: Protect masonry by covering during precipitation, and at all times when work is not proceeding. • Hot conditions and drying winds: Prevent masonry from drying out rapidly. • New mortar damaged by frost: Rake out and replace.

190 CONTROL SAMPLES • General: Complete an area of each of the following types of work, and arrange for inspection before proceeding with the remainder: repointing.

MATERIAL/ PRODUCTION/ ACCESSORIES

215 MATERIAL SAMPLES • Representative samples of designated materials: Submit before placing orders. - Designated materials: sands for bedding and pointing. • Retention of samples: Unless instructed otherwise, retain samples on site for reference. Protect from damage and contamination.

240 STONE • Supplier: Submit proposals. • Type: To match existing. • Quality: Free from vents, cracks, fissures, discolouration, or other defects that may adversely affect strength, durability or appearance. Thoroughly seasoned, dressed and worked in accordance with shop drawings prepared by the supplier. • Finish: Rock faced.

DISMANTLING/ REBUILDING

310A DISMANTLING MASONRY FOR REUSE • Masonry units to be reused: Remove carefully and in one piece. - Treatment: Clean off old mortar, organic growths and dirt, and leave units in a suitable condition for rebuilding.

320A REBUILDING WALLING GENERALLY • Replacement materials: Stone reclaimed from site and as clause 240. • Mortar: As section Z21. - Mix: 1:3 quicklime (as Z21/235): sand (as Z21/320A) with 10% by volume of pozzolan added (as Z21/340A). - Sand source/ type: Coarse well graded sand to architects approval, for pricing purposes use Cardewmires sand. • Fixings: Not required. • Rebuilding: To match previous face and joint lines, joint widths and bonding. Adequately bonded to retained work/ backing masonry, as appropriate. • Joint surfaces: Dampen, as necessary, to control suction. • Laying masonry units: On a full bed of mortar; perpend joints filled. • Exposed faces: Remove mortar and grout splashes immediately. • Joints: Flush. • Other requirements: None.

340A REPLACEMENT OF STONE GENERALLY • Stone: Reclaimed from site. • Bedding depths: 300 mm. • Mortar: As section Z21. - Mix: 1:3 quicklime (as Z21/235): sand (as Z21/320A) with 10% by volume of pozzolan added (as Z21/340A). - Sand source/ type: Well graded coarse sand to Architects approval. For pricing purposes use Cardewmires grit sand. • Joints: Flush.

Page 3 of 11 18051 Kirkhead Tower - Specifiation C41 Repairing/ Renovating/ Conserving masonry

360 TILE REPLACEMENT OF MISSING AREAS OF STONE • Tiles: Slate. - Installation: Tiles cut neatly, laid to break joints, set into backing on a full bed of mortar. • Mortar: As section Z21. - Mix: 1:3 quicklime (as Z21/235): sand (as Z21/320A) with 10% by volume of pozzolan added (as Z21/340A). - Sand source/ type: Well graded coarse sand to approval by Architect. For pricing purposes use Cardewmires sand. • Joints: Flush. • Other requirements: Slate tiles to be cut to fit surrounding stonework. Surrounding stone work must not be moved or cut to accommodate slate tiles.

410A CORRODED FIXINGS • Removal: Cut out carefully, causing the least possible disturbance to surrounding masonry. Remove associated rust debris. • Replacement of fixings is not required.

415 STONE PINNINGS FOR RUBBLE STONEWORK • Material for pinnings: Reclaimed sound pinnings . • Placing: Tamp pinnings firmly into fresh mortar. Ensure mortar is thoroughly compacted into voids and that levelling and load distribution functions of pinnings are retained.

POINTING/ REPOINTING

810A PREPARATION FOR REPOINTING • Existing mortar: Working from top of wall downwards, remove mortar carefully, without damaging adjacent masonry or widening joints, to a minimum depth of 30 mm or twice the width of the joint, whichever is greatest. Stone mason to bear in mind that some joints are very washed out, with large voids behind and with little mortar left in place. Pinning, as clause 415, deep packing and pointing will certainly be required in many places and the stone mason must satisfy themselves that their price submitted allows for re-pointing to significant depths to ensure the soundness of new mortar once cured. That being the case a detailed inspection of the existing condition of the masonry by the stone mason is essential during the tender pricing stage. - Loose or friable mortar: Seek instructions when mortar beyond specified recess depth is loose or friable and/ or if cavities are found. • Raked joints: Remove dust and debris.

820 POINTING STONEWORK GENERALLY • Preparation of joints: First rake out as described in clause 810A then carefully brush away loose mortar and dampen joints as necessary to control suction. • Mortar: As section Z21. - Mix: 1:3 quicklime (as Z21/235): sand (as Z21/320A) with 10% by volume of pozzolan added (as Z21/340A). - Sand source/ type: Well graded coarse sand to approval by Architect. For pricing purposes use Cardewmires sand. • Joints profile/ finish: Flush to stone arrises and with a brushed finish as clause 860A. • Other requirements: Initially joint should be left slightly full. As mortar begins to set and stiffen scrape excess mortar away then beat with a stiff churn brish. Clearly this joint profile is subjective and will depend on site conditions and placing of existing and new stones. A general agreement of technique is to be established by Stone Mason and Architect during the provision of exemplars as requested by clause 190. Inclusion should be made for covering the pointing with hessian sheeting and dampening as required. Include also for covering with plastic sheeting which may be necessary depending on weather conditions. Final method of protection of pointing to be agreed on site with mason.

840 POINTING WITH TOOLS/ IRONS • General: Press mortar well into joints using pointing tools/ irons that fit into the joints, so that they are fully filled. • Face of masonry: Keep clear of mortar. Use suitable temporary adhesive tape on each side of joints where necessary. Finish joints neatly.

860A BRUSHED FINISH TO JOINTS • Timing: After initial mortar set has taken place remove laitance and excess fines by brushing, to give a coarse texture. Do not overly compact mortar. Use relatively firm bristle brush (churn brush) beating against the surface of the joint rather than 'brushing' along the joint. This will slightly compact the mortar as well as remove surface latents and open the surface's pore structure.

Page 4 of 11 18051 Kirkhead Tower - Specifiation F31 Precast concrete sills/ lintels/ copings/ features

F31 Precast concrete sills/ lintels/ copings/ features

5 DESIGNATED CONCRETE PRECAST LINTELS • Concrete: Designated to BS 8500-2: Submit proposals . • Reinforcement: Submit proposals . • Cover to reinforcement (nominal): Minimum cover 30 mm plus 10 mm fixing tolerance . • Finish to visible faces: textured . • Other requirements: None .

10 CONCEALED PRECAST LINTELS • Concrete: Designated to BS 8500-2: Minimum RC30 - Aggregate nominal maximum size: 20 mm. • Configuration: - Clear span up to 900 mm: Section: 140 mm deep x width of wall. Bearing: 150 mm at both ends. Reinforcement: One 12 mm carbon steel bar for each 105 mm of wall thickness. - Clear span 900 mm to 1800 mm: Section: 215 mm deep x width of wall. Bearing: 225 mm at both ends. Reinforcement: One 16 mm carbon steel bar for each 105 mm of wall thickness. • Cover to reinforcement (nominal): 20 mm minimum.

25 REINFORCEMENT • Carbon steel reinforcement: As appropriate to BS 4449, BS 4482 and BS 4483. - Cutting and bending: To BS 8666. • Fixing: Accurate and secure. - Method: Wire tying, approved steel clips or tack welding if permitted. - Concrete cover: Maintain free of tying wire or clips. - Cover spacers on visible faces: Not permitted.

30 CASTING AND CURING • Placement of concrete: Thoroughly compact. • Immature components: Avoid movement, vibration, overloading, physical shock, rapid cooling and thermal shock. • Protection from weather: Do not expose panels to direct sunlight and drying winds until at least five days after casting.

32 CUTTING • Cutting of precast concrete components: Not permitted.

40 LAYING • Mortar for bedding and jointing: As section Z21. - Type: Site batched and mixed. - Mix: 1:3 quicklime (as Z21/235): sand (as Z21/320A) with 10% by volume of pozzolan added (as Z21/340A). • Bedding components: On full bed of mortar. • Bedding one piece sills/ thresholds: Leave clear of mortar except at end bearings and beneath masonry mullions. - On completion: Point with mortar to match adjacent work.

Page 5 of 11 18051 Kirkhead Tower - Specifiation H71 Lead sheet coverings/ flashings

H71 Lead sheet coverings/ flashings

To be read with Preliminaries/ General conditions.

TYPES OF LEADWORK

250A WEATHERING TO WALL CAPPING • Substrate: Render. • Underlay: Not required. • Type of lead: Rolled to BS EN 12588. - Thickness: 2.50 or 2.65 mm (Code 6) - Finish: Fully coated with high-build, bitumen based paint on the surfaces which are in contact with masonry / mortar . • Joints: Welted. - Spacing: 1500 mm. • Edge details: Welted drip at front, upstand at rear with tuck in . • Fixing: Stainless steel clips at 300 centres. • Accessories: None.

420 COVER FLASHINGS OVER WALL HEAD CAPPING • Lead: - Thickness: 2.50 or 2.65 mm (Code 6) - Finish: Fully coated with high-build, bitumen based paint on the surfaces which are in contact with masonry / mortar . • Dimensions: - Lengths: Not more than 1500 mm. - End to end joints: Laps of not less than 100 mm. - Cover: Overlap to upstand of not less than 75 mm. • Fixing: Lead wedges into bed joint, clips to lead upstand at laps and 300 mm centres.

GENERAL REQUIREMENTS/ PREPARATORY WORK

510 WORKMANSHIP GENERALLY • Standard: To BS 6915 and latest edition of 'Rolled lead sheet. The complete manual' published by the Lead Sheet Association. • Fabrication and fixing: To provide a secure, free draining and completely weathertight installation. • Operatives: Trained in the application of lead coverings/ flashings. Submit records of experience on request. • Preforming: Measure, mark, cut and form lead prior to assembly wherever possible. • Marking out: With pencil, chalk or crayon. Do not use scribers or other sharp instruments without approval. • Bossing and forming: Straight and regular bends, leaving sheets free from ripples, kinks, buckling and cracks. • Solder: Use only where specified. • Sharp metal edges: Fold under or remove as work proceeds. • Finished work: Fully supported, adequately fixed to resist wind uplift but also able to accommodate thermal movement without distortion or stress. - Protection: Prevent staining, discolouration and damage by subsequent works.

515 LEADWELDING • In situ leadwelding: Not permitted.

520 LEAD SHEET • Production method: - Rolled, to BS EN 12588, or - Machine cast and BBA certified, or - Sand cast, from lead free from bitumen, solder, other impurities, inclusions, laminations, cracks, air, pinholes and blowholes; to code thicknesses but with a tolerance (by weight) of ±10%. • Identification: Labelled to show thickness/ code, weight and type.

610 SUITABILITY OF SUBSTRATES • Condition: Dry and free of dust, debris, grease and other deleterious matter.

Page 6 of 11 18051 Kirkhead Tower - Specifiation H71 Lead sheet coverings/ flashings

FIXING LEAD

705 HEAD FIXING LEAD SHEET • Top edge: Secured with two rows of fixings, 25 mm and 50 mm from top edge of sheet, at 75 mm centres in each row, evenly spaced and staggered. • Sheets less than 500 mm deep: May be secured with one row of fixings, 25 mm from top edge of sheet and evenly spaced at 50 mm centres.

710 FIXINGS • Nails to timber substrates: Copper clout nails to BS 1202-2, or stainless steel (austenitic) clout nails to BS 1202-1. - Shank type: Annular ringed, helical threaded or serrated. - Shank diameter: Not less than 2.65 mm for light duty or 3.35 mm for heavy duty. - Length: Not less than 20 mm or equal to substrate thickness. • Screws to concrete or masonry substrates: Brass or stainless steel to BS 1210, tables 3 or 4. - Diameter: Not less than 3.35 mm. - Length: Not less than 19 mm. - Washers and plastic plugs: Compatible with screws and lead. • Screws to composite metal decks: Self tapping as recommended by the deck and lead manufacturer/ supplier for clips.

715 CLIPS • Manufacturer: Contractor's choice. • Material: - Lead clips: Cut from sheets of same thickness/ code as sheet being secured. - Copper clips: Thickness: 0.70 mm. Temper: BS EN 1172, designation R220 in welts, seams and rolls, R240 elsewhere; dipped in solder if exposed to view. - Stainless steel clips: Thickness: 0.46 mm. Grade: BS EN 10088, 1.4301(304) terne coated if exposed to view. • Dimensions: - Width: 50 mm where not continuous. - Length: To suit detail. • Fixing clips: Secure each to substrate with either two screw or three nail fixings not more than 50 mm from edge of lead sheet. Use additional fixings where lead downstands exceed 75 mm. • Fixing lead sheet: Welt clips around edges and turn over 25 mm.

770 WEDGE FIXING INTO JOINTS/ CHASES • Joint/ chase: Rake out to a depth of not less than 25 mm. • Lead: Dress into joint/ chase. - Fixing: Lead wedges at not more than 450 mm centres, at every change of direction and with at least two for each piece of lead. • Sealant: Leadmate by BML. - Application: As section Z22.

JOINTING LEAD

810 FORMING DETAILS • Method: Bossing or leadwelding except where bossing is specifically required. • Leadwelded seams: Neatly and consistently formed. - Seams: Do not undercut or reduce sheet thickness. - Filler strips: Of the same composition as the sheets being joined. - Butt joints: Formed to a thickness one third more than the sheets being joined. - Lap joints: Formed with 25 mm laps and two loadings to the edge of the overlap. • Bossing: Carried out without thinning, cutting or otherwise splitting the lead sheet. - Details where bossing must be used: Not applicable .

880 WELTED JOINTS • Joint allowance: 50 mm overlap and 25 mm underlap. • Copper or stainless steel clips: Fix to substrate at not more than 450 mm centres. • Overlap: Welt around underlap and clips and lightly dress down.

Page 7 of 11 18051 Kirkhead Tower - Specifiation H71 Lead sheet coverings/ flashings

970 PATINATION OIL • Manufacturer: Contractor's choice. - Product reference: Contractor's choice. • Location: all exposed lead. • Application: As soon as practical, apply a smear coating to lead, evenly in one direction and in dry conditions.

Page 8 of 11 18051 Kirkhead Tower - Specifiation Q23 Gravel/ Hoggin/ Woodchip/ Resin bound roads/ pavings/ overlays

Q23 Gravel/ Hoggin/ Woodchip/ Resin bound roads/ pavings/ overlays

To be read with Preliminaries/ General conditions.

TYPES OF SURFACING

110A SLATE MULCH TO INSIDE OF TOWER • Subgrade improvement layer: Submit proposals. - Compacted thickness: Submit proposals. • Geotextile: Sheet. - Manufacturer: Contractor's choice. Product reference: Contractor's choice. • Granular sub-base: None required. - Compacted thickness: N/A. • Blinding to sub-base: Not required. • Surface course: Slate mulch. - Type: green slate. - Source: Burlington Stone T: +44 (0)1229 889661 Cavendish House, Kirkby-in-Furness, Cumbria. LA17 7UN. - Colour: Green. - Size: Graded 6-20 mm. - Compacted thickness: 50 mm. • Completion: Compact to produce a firm, regular surface, stable in use.

LAYING

340 LAYING GENERALLY • Channels, gullies, etc: Keep clear. • Finished surfaces: - Lines and levels: To prevent ponding. - Overall texture: Even. - State at completion: Clean.

Page 9 of 11 18051 Kirkhead Tower - Specifiation Z21 Mortars

Z21 Mortars

To be read with Preliminaries/ General conditions.

LIME:SAND MORTARS

310 LIME:SAND MORTAR MIXES • Specification: Proportions and additional requirements for mortar materials are specified elsewhere.

320A SAND FOR LIME:SAND MASONRY MORTARS • Type: Sharp, well graded Cardewmires. - Quality, sampling and testing: To BS EN 13139. - Grading/ Source: Thomas Armstrong (Holdings) Ltd Workington Road Flimby Maryport Cumbria CA15 8RY Tel: 01900 68211 Fax: 01900 602672.

325 QUICKLIME FOR NOT MIXED LIME MORTARS • Manufacturer: Lafarge Tarmac Portland House Bickenhill Lane Solihull West Midlands B37 7BQ - Product reference: Calbux 90M high reactivity, fine ground quicklime

340A POZZOLANIC ADDITIVES FOR NONHYDRAULIC LIME:SAND MORTARS • Manufacturer/ Supplier: Hot Lime Mortar Ltd Edenholme, Great Musgrave, Kirkby Stephen, Cumbria, CA17 4DP Tel: 07717 400233 Email: [email protected].. - Product reference: Argical-M1000. • Mixing: The pozzolan should be added to the mortar immediately prior to use 10% by volume is required. It is important that the mortar mix has a temperatre of less than 50°c prior to adding the pozzolan. The pozzolan comes in powdered form and must be mixed with water into a paste prior to addition to the mortar mix. Mix thoroughly into the mortar.

360 MAKING LIME:SAND MORTARS GENERALLY • Batching: By volume. Use clean and accurate gauge boxes or buckets. • Mixing: Mix materials thoroughly to uniform consistency, free from lumps. • Contamination: Prevent intermixing with other materials, including cement.

370A SITE PREPARED NONHYDRAULIC LIME:SAND MORTARS • Mixing: Mix quicklime and naturally moist aggregate thoroughly. Place the quicklime at bottom of roller pan mixer and cover with aggregate, this will help to keep steam within the mix at the beginning of the mixing/slaking process. Allow to 'dry slake' until a super-fine dust begins to rise from the mix. Incrementally add water sufficient to make the mix workable (do not overwet) mortar should be stiff whilst still pliable. Add pozzolan (as Z21/340A), this should be mixed with water to a runny paste and added once the hot mix has cooled to a temperature of 50°c or less. - Equipment: Roller pan mixer or submit proposals.Use tyre-rubber trugs - plastic buckets will melt • Maturation period before use (maximum): Mortar is ready to use 10 - 15 minutes after mixing, ideally use as soon as possible, if mortar is set aside for later use do not add pozzolan, this should only be added prior to mtar being used. Only mix enough mortar to use for that day. Use of mortar made on previous days only permitted if pozzolan has not yet been added to the mix..

Page 10 of 11 18051 Kirkhead Tower - Specifiation Z22 Sealants

Z22 Sealants

To be read with Preliminaries/General conditions.

EXECUTION

610 SUITABILITY OF JOINTS • Presealing checks: - Joint dimensions: Within limits specified for the sealant. - Substrate quality: Surfaces regular, undamaged and stable. • Joints not fit to receive sealant: Submit proposals for rectification.

620 PREPARING JOINTS • Surfaces to which sealant must adhere: - Remove temporary coatings, tapes, loosely adhering material, dust, oil, grease, surface water and contaminants that may affect bond. - Clean using materials and methods recommended by sealant manufacturer. • Vulnerable surfaces adjacent to joints: Mask to prevent staining or smearing with primer or sealant. • Backing strip and/ or bond breaker installation: Insert into joint to correct depth, without stretching or twisting, leaving no gaps. • Protection: Keep joints clean and protect from damage until sealant is applied.

630 APPLYING SEALANTS • Substrate: Dry (unless recommended otherwise) and unaffected by frost, ice or snow. • Environmental conditions: Do not dry or raise temperature of joints by heating. • Sealant application: Fill joints completely and neatly, ensuring firm adhesion to substrates. • Sealant profiles: - Butt and lap joints: Slightly concave. - Fillet joints: Flat or slightly convex. • Protection: Protect finished joints from contamination or damage until sealant has cured.

Page 11 of 11 Heritage Statement Incorporating Design Statement

Repair and Consolidation Works

Kirkhead Tower for Morecambe Bay Partnership August 2018

Ref. 18051/HS

John Coward Architects Limited No.3 Unsworth’s Yard Ford Road Cartmel Cumbria LA11 6PG

Telephone: (015395) 36596 E:mail: [email protected] 1.0 INTRODUCTION

1.1 Kirkhead Tower is a ruined summer house on top of Kirkhead, overlooking Morcambe Bay.

1.2 The summer house is owned and cared for by Holker Estates Ltd.

1.3 It is believed the summer house was built as a folly related to the nearby Abbot Hall. Abbot Hall was built in the 1840s and extended about thirty years following. However, a summer house in this location exists on earlier maps of the area, Hennets Map of Lancaster dated 1830 for example1. Perhaps the summer house predates Abbot Hall, or perhaps the map shows an earlier summer house that was subsequently replaced.

1.4 Although in reasonable condition, the summerhouse is in need of some repair and consolidation works to preserve it. An application is therefore being made for these proposed works.

2.0 THE SETTING

2.1 Kirkhead lies to the south of the Catmel Peninsula and is an elevated rocky knoll just north of Morecambe Bay. Kirkhead Tower is located on top of the knoll and benefits from spectacular panoramic view.

Plate 1 - Site plan showing location

1 Kirkhead Summer House Phase 1 Conservation Statement, Purcell, October 2015 issue 4

2.2 The land on which the summer house is located is part of the Holker Estate. There is limited public access to the tower as the surrounding land is in private ownership

2.3 There are no roads or pathways to the summer house.

2.4 The area surrounding the summer house has been the subject of several interesting archaeological finds. These have been largely located in or around Kirkhead Cave to the west and indicate human activity around the location since prehistoric times.

3.0 THE STRUCTURE

3.1 Kirkhead summer house is square in plan and two storeys (albeit the first floor has been lost). A single square room downstairs and another room immediately above is the extent of the building. There is an external staircase that leads to the first floor room.

3.2 Access to the ground floor is via a doorway (the door is no longer present) in the east elevation. There are no window openings at this level. Internally there is a fireplace.

3.3 The external staircase to the south gives access to the first floor level. There are additional openings (the windows are no longer present) on the east and west elevations, all have arched heads. A fireplace also exists at first floor level. There are alcoves to the east and west of the fireplace opening, both are now infilled.

3.4 Walls are constructed with limestone rubble and dressed quoins. A crenulated parapet terminates the walls and this steps out slightly from the line of the main walls.

3.5 Externally walls are constructed with a coarse lime bedding mortar and there is evidence of a render coat.

3.6 Internally, at first floor level, there is evidence of a plaster finish with ashlar detailing.

3.7 Although the floor is lost, joist sockets are visible in the north and south walls internally.

3.8 The roof of the summer house is also lost, however some lead work, chutes through the east wall, still exist providing evidence of how the former roof was drained.

3.9 The external staircase is again constructed of limestone. The landing has been overlaid with concrete and the west wall appears to have been more recently rebuilt.

3.10 Fixings for a flagpole can be seen on the south wall of the summer house.

4.0 LISTING NOTICES

KIRKHEAD SUMMER HOUSE List Entry Summary This building is listed under the Planning (Listed Buildings and Conservation Areas) Act 1990 as amended for its special architectural or historic interest. Name: KIRKHEAD SUMMER HOUSE List entry Number: 1087159 Location KIRKHEAD SUMMER HOUSE, KIRKHEAD ROAD The building may lie within the boundary of more than one authority. County: Cumbria District: South Lakeland District Type: District Authority Parish: Lower Allithwaite National Park: Not applicable to this List entry. Grade: II Date first listed: 15-Feb-1989 Date of most recent amendment: Not applicable to this List entry. Legacy System Information The contents of this record have been generated from a legacy data system. Legacy System: LBS UID: 76986 Asset Groupings This list entry does not comprise part of an Asset Grouping. Asset Groupings are not part of the official record but are added later for information. List entry Description Summary of Building Legacy Record - This information may be included in the List Entry Details. Reasons for Designation Legacy Record - This information may be included in the List Entry Details. History Legacy Record - This information may be included in the List Entry Details. Details LOWER ALLITHWAITE KIRKHEAD ROAD SD 37 NE (South side) 5/72 Kirkhead Summer House G.V. II Summerhouse. Cl9. Stone rubble. Square tower of 2 stages. Projecting embattled parapet with large stones at angles; lead spout to east. West face has pointed window opening, similar opening to east has remains of shutter and sash, and entrance beneath. South face has later stone steps to pointed entrance to 1st floor. Interior has lost floor, no roof. Probably associated with Abbot Hall, Grange U.D. (q.v.).

Listing NGR: SD3926775626 Selected Sources

Legacy Record - This information may be included in the List Entry Details

National Grid Reference: SD 39267 75626

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5.0 SIGNIFICANCE

Kirkhead summer house is a good example of a Georgian folly. The crenulated parapet and gothic arched windows are romantic in appearance and its situation overlooking Morecambe Bay is charming.

The structure of the building and method of construction is typical for the period. Mortar analysis has indicated the walls were built using a naturally hydraulic lime mortar. There is a lime kiln a few hundred metres north of the summer house and is likely the lime came from there.

Several attractive details such as the parapet, with standing limestones on the four corners, arched window openings, delicate proportions illustrate that care was taken in the design and detailing of the summer house. It was evidently build for the purpose of being a folly.

The summer house is visible from quite far away and is a well know landmark within the area. However, access to the summer house is very restricted due to it being located on private land. Nonetheless it is a significant and treasured landmark within the locality.

Ties to Abbot Hall are significant and of particular interest is the apparent existence of the summer house prior to the building of Abbot Hall.

6.0 Design Statement

6.1 Works to the summer house are restricted to repair and consolidation works. Some alterations are proposed, such as the capping of the walls at high level, replacement of rotten lintels and laying of a mulch finish to the floor internally.

7.0 Impact Assessment

7.1 The proposed repair works will have a positive impact on the summer house. Whilst the ruin is in reasonable condition, some works are required to conserve it.

7.2 The roof of the summer house has been lost. Wall tops are therefore exposed with no protection. The proposal is to install a lead capping that will direct water away from the wall heads, preventing water running through the core of the wall which can destabilise a wall. The capping will be discreet and barely visible from ground level.

7.3 Walls of the summer house are in reasonable condition. There are localised areas where the wall is unstable and rebuilding is required. The rebuilding will be done in a like for like manner using quarried limestone and hydraulic lime mortar.

7.4 Where smaller voids exist in the walls these will be stabilised using slate tile repairs which will allow the infilling of the voids without larger areas of rebuilding being required.

7.5 General repointing will be carried out using a hot mixed lime mortar with pozzolanic additive. Mortar analysis has been carried out to inform the specification of the repair mortar. Consideration was given to reinstating the render, however it was felt this was not necessary now the building is a ruin. The impact of repointing will be positive as it will consolidate the walls.

7.6 Internally a timber lintel over the former alcove to the east of the fireplace at first floor level has completely rotted and collapsed leading to the collapse of masonry over. This lintel will be replaced with a concrete lintel and the wall above rebuilt. Consideration was given to a timber lintel however, this would be vulnerable to decay. A concrete lintel is an honest repair and easily distinguishable as a modern intervention which helps with the legibility of the building.

7.7 Internally there are remnants of a plaster finish. There is no intention to reinstate this as again it was not felt appropriate for the ruin. However, the free edges of the remining plaster will be supported where necessary to help conserve the detail which is again a positive impact on the ruin.

7.8 A geotextile membrane and slate mulch will be laid in the summer house to prevent vegetation growth which could cause damage to the ruin. This is an entirely reversible intervention and is proposed to protect the building.

7.9 Overall the repairs that are proposed are designed to consolidate the building as found. Some interventions are proposed but these are to protect the building and slow decay in the long term and are therefore deemed appropriate.

Photographic Record

Summer house viewed looking south west. Summer house viewed looking north east. The Crenulated parapet and gothic arched window staircase to the south is visible in the foreground. heads visible.

Evidence of internal plaster finish with ashlar Internal north wall with former alcoves and detailing. fireplace shown built in. The ground floor fireplace is also just visible.

Openings for joists that will have supported former first Crenulated parapet and leadwork from former roof floor. covering visible.

Detail of north wall showing evidence of buff coloured Access doorway / window to first floor of summer render. house.

Access stair to south of summer house. Concrete landing and area of more recently rebuilt wall beyond.