Between you and the sky... My name is Vladimír Soukup and it is my Initially, the windows were available in no pleasure to introduce you to FENESTRA more than five sizes. Over the time, how- roof windows manufactured in the Czech ever, the variety of products kept grow- Republic. ing. Today, our product range includes wooden and plastic windows with several As far back as 1986, Mr. Václav Soukup de- kinds of glazing; there are five window signed the very first FENESTRA roof window construction types available in sixteen and launched the production of wooden standard sizes, as well as made-to-order roof windows. windows with dimensions adapted to your specifications. unique advantages of THERMOS HEAT INSULATION windows: 1 SET FENESTRA roof windows with THER- ature of the window frame by 5.5 °C and THERMOS heat insulation set pro- MOS heat insulation set offer greatly shifts the threshold of vapour condensa- vides roof windows with thermal insu- improved thermal insulation proper- tion on the fixed parts of the window way lation along their full height above the ties. The flashings are factory-fitted with above the safe limit for relative humidity in roof level. The window thus receives 30 mm extruded polystyrene strips which indoor spaces. The heat transfer coeffi- a “warm coat” in the cold environment provide full-height thermal insulation cient of the insulation is λ= 0.033 W/mK. where the frame is normally exposed to around the external sides of the win- severe heat stress. dow frame in areas where the window protrudes into cold outside environment. The heat insu- lation increases the inte- rior surface tem- no more frost penetration or per- moisture WARM TYPE 2 OF WINDOW SASH 5 mm heat insulation THERMICAL series roof windows differ stead of the normal 10 mm overlap). This from ordinary windows in their warm- is important, as the edge of the glazing is 23 mm type sash which provides enhanced the most sensitive area. If condensation 58 mm protection from the build-up of conden- along the glazing edge is to be prevented, no more sation. The sash has wider wooden pro- the edge should be placed deeper in the condensation files (58 mm width instead of the normal frame and better insulated. In addition, 45 mm width) which maintain higher sur- the area near the glazing edge is insu- face temperatures and provide space for a lated on top with extruded polystyrene. larger glazing-rabbet overlap (23 mm in- 2 The quality of FENESTRA roof windows is uct. Thanks to this arrangement, we can We are a family company which has been guaranteed by our choice of top-quality always deliver the declared quality level developing and perfecting FENESTRA materials, our use of cutting-edge technol- and provide an extraordinary warranty of roof windows for almost 30 years. MAKE ogies and by stringent quality inspections up to 15 years. This extensive warranty is YOUR CHOICE FROM WHAT WE HAVE throughout the manufacturing process. based on many years of experience with TO OFFER: Results of those inspections are recorded roof window production and on state-of- on the identification label of each prod- the-art materials and technologies. INTEGRAL TOP HEAT INSULATION SEGMENT OF SASH-FRAME 3 OF FLASHING 4 GAP Thanks to the unique manufacturing In EXCELLENT and THERMICAL roof win- route used in our automatic form- dows, the gap between the frame and ing centre, the top segment of our the sash at the top and along the sides of flashing is made of a single piece the window is sealed with double seal- of stock. This guarantees safe drain- ing and covered with a wooden profile. ing of the entire roof area above At the bottom of the window, which is the window and makes the struc- the location under the most severe heat ture completely weather-tight in win- stress, the gap is sealed with three insu- ter months when snow is often trapped lating strips and extruded polystyrene above the window and melts and freezes with a heat transfer coefficient repeatedly. of 0.033 W/m·K. Thanks to this enhanced insulation, the window surface temperature is high- er than in ordinary windows (which is important because a higher surface tem- perature reduces the undesirable build-up of condensation). MULTI-FUNCTION INTERIOR ROLLER 6 BLINDS In order to prevent heat from entering the room, you can use either exteri- or accessories (which tend to be out of reach when installed on roof windows) or unique interior roller blinds which are always at hand. MULTIFILM® interior roll- er blinds keep out direct sunlight and al- low low-energy diffused daylight in. With EXTENSION MOULDINGS them, the room receives daylight where- 5 FOR ADDED INSULATION as the unwanted heat generation is minimised. MULTIFILM® interior Our original extension mouldings for sunscreening protects the room EXCELLENT and THERMICAL series roof from overheating by the sun’s windows provide space for added insu- thermal energy (eliminates up lation in locations where there is an acute to 84 % of energy, depend- angle between the interior reveal and the ing on the film type). In winter, roof. these roller blinds save energy The added heat insulation eliminates cold (as they improve the window's bridges above and below the window. thermal insulation performance by approximately 30 %). 3 CHOOSING YOUR WINDOW WINDOW INSTALLATION HEIGHT The appropriate window installation height is given by several factors. They in- 200 cm clude not only the roof pitch, the view and the daylight distribution but also the oper- 160 cm 140 cm ation of the window and the exterior awn- 118 cm 98 cm ing and the need for comfortable cleaning 90 cm of both sides of the glazing. For these rea- sons, the top edge should not be higher than 200 cm above the floor. Depending 15°-40° 30°-55° 40°-65° 55°-85° on the roof pitch, choose a window length which offers a good view to both standing and seated persons (the bottom edge of the window frame should be approxi- mately 90 cm above the floor level). OPTIMUM DAYLIGHT DISTRIBUTION The number and size of roof windows govern the amount and distribution of daylight in the room, as well as the view. Mul- tiple smaller windows allow the light to be distributed more uniformly than one large window does (with equal total glazed areas). INSTALLATION INSTRUCTIONS FOR TROUBLE-FREE USE OF ROOF WINDOWS • Radiators should always be positioned below the roof windows • The interior reveal surface below the window should be vertical and the one above the window horizontal • Hot air should flow past the entire surface of the glazing – particularly at the bottom of the window In order to get all benefits of high-quality roof windows, the interior reveal must be built correctly. It can provide maxi- mum daylight in the room (30-40 % more daylight than a dormer window of equal glazed area) and natural flow of air past the glass pane. This greatly reduces the risk of build-up of internal condensation on the surface of the double glazing unit. GLAZING FENESTRA roof windows are available with various types of glazing. You can choose double or triple glazing with soft coating which reflects thermal energy back into the room. A spacing frame made of low-conductivity material is fitted between glass panes to form a warm edge which suppresses build-up of internal condensation on the glass. Standard double 4/16 argon/4 mm Rw=31 dB Ug=1.1 W.m-2.K-1 glazing Noise-reducing triple 55.1 Stratophone/12 krypton/6 mm Rw=40 dB Ug=1.1 W.m-2.K-1 glazing GPA triple glazing 4/8 argon/4/8 argon/4 mm Rw=32 dB Ug=0.8 W.m-2.K-1 GPK triple glazing 4/8 krypton/4/8 krypton/4 mm Rw=32 dB Ug=0.6 W.m-2.K-1 GPK+ triple glazing 4/8 krypton/4/10 krypton/4 mm Rw=32 dB Ug=0.5 W.m-2.K-1 4 SIZE CHART For optimum amount of daylight in the room, the aggregate Window width glazed area of windows should be no less than 15 % of the 55 cm 66 cm 78 cm 86 cm 94 cm 114 cm 506 606 706 806 906 F06 floor area. The size chart on the right shows the window code, EK EF EF EF EF EF 66 cm TK TF TF TF TF TF the product lines available, the glazed area and external frame 0,19 m² 0,27 m² 0,33 m² 0,38 m² 0,42 m² 0,53 m² size. 507 607 707 807 907 F07 If a non-standard size is requested, we can make custom-size BK, EK EF EF EF EF EF 78 cm TK, PK TF TF TF TF TF roof windows to your specified dimensions. Custom-size win- 0,24 m² 0,32 m² 0,39 m² 0,45 m² 0,50 m² 0,64 m² dows can be made of wood (47-134 cm width, 78-160 cm height) or plastic (55-114 cm width, 78-140 cm height). 509 609 709 809 909 F09 Each FENESTRA roof window has an identification label which BK, BV EF BK, BV, EK EF EF EF 98 cm EK, TK TF TK, PK, PV TF TF TF PK, PV 0,42 m² EF, TF 0,59 m² 0,65 m² 0,79 m² is used for quality inspections throughout the manufacturing 0,3 m² 0,50 m² process and enables the customer to order accessories easily.