Conservatory of Flowers Muntin Cap Project: Location Map 11.2.16 Conservatory of Flowers North Conservatory of Flowers Muntin Cap Project 11.2.16 Roof Plan NO. DESCRIPTION DATE REVISIONS CONSERVATORYNO. DESCRIPTION DATE OF FLOWERS MUNTIN CAP REVISIONS PROJECT CONSERVATORY OF FLOWERS MUNTIN CAP SAN FRANCISCO RECREATION AND PARKS DEPARTMENTPROJECT 30 VAN NESS AVENUE, 3RD FLOOR SAN FRANCISCO, CA 94102 SAN FRANCISCO RECREATION AND PARKS DEPARTMENT SHEET TITLE 30 VAN NESS AVENUE, 3RD FLOOR SAN FRANCISCO, CA 94102 ROOF PLAN SHEET TITLE ISSUANCE 100% CONSTRUCTIONROOF DOCUMENTS PLAN 14 MARCH 2016 PROJ NO. ISSUANCE 15240 100% CONSTRUCTION DOCUMENTS DRAWN 14 MARCH 2016 ML CHECKED PROJ NO. DW 15240 DRAWN Work will be continued on the east wing of the Conservatory of Flowers. DRAWING NO. ML CHECKED ARCHITECTURAL RESOURCES GROUP A1 DW 24"x36" OR 22"x34" SHEET SIZE. IF SHEET IS SMALLER, THEN DRAWING HAS BEEN REDUCED. DRAWING NO. ARCHITECTURAL RESOURCES GROUP A1 24"x36" OR 22"x34" SHEET SIZE. IF SHEET IS SMALLER, THEN DRAWING HAS BEEN REDUCED. ARG #14124 Conservatory of Flowers May 7, 2015 Muntin Treatment Test Mock Ups The use of silicone sealants and extrusions as a substitute for putty were tested on the Conservatory at three muntin locations on May 16, 2013. Two of the test muntin locations were located at the south side of the east wing, while the third muntin location was on the north side of the east wing. On December 23, 2014, the mock ups were reviewed to assess their long term performance. Ultimately, after all the test mockups,Conservatory it was concluded of Flowersthat the most Muntin successful Capproducts Project: and method Photographs of application were Dow Corning11.2.16 123 Seal (silicone extrusion), paired with Dow Corning 795 (silicone sealant) applied on the outside of the extrusion. The following pages contain: (1) photos of the deteriorated conditions of muntins; (2) plans and photos which specify the three test locations of the mock ups; and (3) photo details of successf ul and unsuccessf ul mockups. 1.ExistingExisting Conditions The red arrows indicate the failed putty and biological growth at the wood muntins (photos taken by ARG on May 16, 2013) The red arrows indicate the failed putty and biological growth at the wood muntins (photos taken by ARG ARG #14124 Conservatory of Flowers May 7, 2015 on May 16, 2013). Muntin Treatment Test Mock Ups Successful mock-up 3. Photo Details (photo taken by ARG on December 23, 2014) The red arrow points to the pro- posed solution, a silicone muntin cap, which is a close visual match to the existing muntins (photos taken by ARG on December 23, 2014) 1 Detail photo of extrusion installed at South Test Location #2. This extrusion (indicated by the red arrow) is a close visual match to the existing muntins. This is the silicone and muntin cap proposed for use in this Certificate of Appropriateness application. 6 Conservatory of Flowers Muntin Cap Project: Photographs 11.2.16 West Wing.