Installation Manual Pitchglaze Roof Window
Contents Contents and introduction 2 Delivery 3 Pre Installation 4 Installation 8 Stage 1. Preparation of the aperture 9 Stage 2. Fitting the Pitchglaze 11 Stage 3. Weathering 16 Interior finishing 25 2
Delivery The Pitchglaze unit should arrive on site in undamaged packaging consisting of sterling board edge protection and poly foam to protect the glass. The complete package should be securely wrapped using Glazing Vision branded packing tape. A separate box containing the installation hardware should be received, and also a second package containing the flashing kit if specified. Please inspect the packaging and unit and advise Glazing Vision within 48 hours from signing the receipt of your delivery of any damage or shortfall. Standard Installation Hardware Enclosed within the hardware box for each unit you should find the following: Stainless steel countersink woods screws Low modulus anthracite/grey silicone Flashing Kit If a Flashing Kit is specified, the following items should also be included: Lead sheet: Head flashing (150mm wide) Cill flashing (450mm wide) Lead for soakers (450mm wide) Roofing underlay: Head apron (1m wide) Jamb aprons (1m wide) Butyl tape 50mm wide 3
Pre-Installation Please ensure all pre-installation checks are carried out prior to commencing installation. CAUTION! These products can be very heavy. Due consideration should be given to getting the product onto the roof safely and extreme care taken during installation. Pre-Installation Roof Checks After checking you have received the required installation hardware and product(s) it is important to ensure that the area of installation is suitably prepared. The area surrounding the aperture should be clear to provide safe access during the installation works. Note that this product is installed from the outside and that suitable provisions should be made for safe handling of the product, including all relevant PPE and safety systems for working at heights if necessary. The supporting rafters and horizontal trimmers, or alternative support frame for the product, should be checked for specification and dimensional accuracy. The aperture should be prepared as described below prior to installation. Preparation of the roof prior to installation will vary depending on roof type and roofing materials. A few common scenarios are included in this manual. Please follow the applicable steps for your configuration. Glazing Vision strongly recommend a dry run (without any silicone) before committing to the final installation. Sales Drawings Sales drawings should accompany this installation manual. If you do not have them then do not continue the installation without them. Sales drawings can be obtained by contacting Glazing Vision. The following pages on preparation of the roof recommend the relevant sales drawings for each installation type. Study them carefully before beginning the installation. 4
Preparation of the Roof Standard Installation Typically for cold-roof construction the Pitchglaze will sit directly upon the outside of the rafters. Sales drawings: Installation (double-glazed) 201-ASS-001 Installation (triple-glazed) 201-ASS-004 Fixing dimensions (both) 201-ASS-007 Supporting trimmer Pitchglaze to sit on face of rafters and trimmers Supporting rafter Fig. A Example of standard installation When preparing rafters, consider how the ends of the battens will be supported at the jambs of the Pitchglaze. Study the sales drawings of the Pitchglaze carefully when designing the size of the aperture. Fig A is for illustrative purposes only and may not be suitable for your installation. CAUTION! These products can be very heavy. Glazing Vision strongly recommend that a structural engineer is consulted when designing the structure(s) that will support the Pitchglaze and the surrounding roof. Nothing in this manual constitutes a structural proposal. Before continuing onto the installation instructions: The rafters and horizontal trimmers that will support the Pitchglaze should be complete and in place. The surrounding roof should not yet be felted or battened, this will be covered in the installation instructions. 5
Preparation of the Roof Sunken Installation Typically for cold-roof construction with thin roofing materials, such as slate the Pitchglaze will sit on the outside of a separate frame sunken below the outside level of the rafters. Sales drawings: Installation (double-glazed) 201-ASS-002 Installation (triple-glazed) 201-ASS-005 Fixing dimensions (both) 201-ASS-007 Pitchglaze to sit on face of sunken frame Secondary fillet (see sales drawing) Fig. B Example of sunken installation Secondary frame sunken below the level of the rafters Study the sales drawings of the Pitchglaze carefully when designing the size of the main aperture and secondary sunken frame. Fig B is for illustrative purposes only and may not be suitable for your installation. CAUTION! These products can be very heavy. Glazing Vision strongly recommend that a structural engineer is consulted when designing the structure(s) that will support the Pitchglaze and the surrounding roof. Nothing in this manual constitutes a structural proposal. Before continuing onto the installation instructions: The sunken frame that will support the Pitchglaze, and the surrounding rafters and horizontal trimmers should be complete and in place. The surrounding roof should not yet be felted or battened, this will be covered in the installation instructions. 6
Preparation of the Roof Raised Installation Typically for warm-roof construction the Pitchglaze will sit on a frame built up from the rafters. Sales drawings: Installation (double-glazed) 201-ASS-003 Installation (triple-glazed) 201-ASS-006 Fixing dimensions (both) 201-ASS-007 Pitchglaze to sit on face of packers Fig. C Example of raised installation Packers added to raise the Pitchglaze away from the rafters When preparing rafters, consider how the insulating sarking and the ends of the battens will be supported at the jambs of the Pitchglaze. Study the sales drawings of the Pitchglaze carefully when designing the size of the aperture and packers. Fig C is for illustrative purposes only and may not be suitable for your installation. CAUTION! These products can be very heavy. Glazing Vision strongly recommend that a structural engineer is consulted when designing the structure(s) that will support the Pitchglaze and the surrounding roof. Nothing in this manual constitutes a structural proposal. Before continuing onto the installation instructions: The raised frame that will support the Pitchglaze, and the surrounding rafters and horizontal trimmers should be complete and in place. The insulating sarking (the insulation installed outside the rafters) and the counter battens of the surrounding roof should be complete and in place. The surrounding roof should not yet be felted or battened, this will be covered in the installation instructions. 7
Installation Instructions Before committing to an installation, Glazing Vision strongly recommend that a dry run is completed of the installation process without using silicone. Note that the installation shown here is a standard installation, using interlocking tiles at 150mm gauge. Other installations differ superficially, but the installation process is similar. Fig. D Example of standard installation (duplication of Fig. A) All of the images in this guide are illustrative. They should be used as a reference only, and may not be a true representation of your installation. Ensure that you have read and understood the entire Installation Instructions section before commencing your install. Glazing Vision strongly recommends that the installation is carried out by competent roofers and lead-workers. 8
Stage 1 Preparation of the Aperture Step 1. Install, trim and finish the roofing underlay (felt or membrane) Trim and then fold the underlay back on itself as shown The underlay should be folded back on the structure that will support the Pitchglaze see sales drawing If a sunken installation is used, the secondary fillet should be underneath the underlay see sales drawing Cut edge of underlay folded back Fig. 1 Roofing underlay installed and prepared Step 2. Install the cill tilting fillet Install a tilting fillet as shown (not supplied) Fix the fillet to the rafters Glazing Vision recommends a hardwood or treated softwood fillet is used Consider the distance required between the cill of the Pitchglaze and the fillet (fig.2 gap A) see sales drawing Gap A Cill fillet (primary) Fig. 2 Cill tilting fillet installed 9
Step 3. Batten up to the cill In addition to normal considerations, consider how the tiling/slates will fit around the Pitchglaze when determining the gauge of the battens Fig. 3 Cill battens installed Step 4. Prepare the cill flashing Place the cill flashing as shown The flashing should be at least 300mm longer than the external width of the Pitchglaze and should be installed centrally The flashing should lap under the cill of the Pitchglaze by at least 50mm Use the cill flashing supplied as part of the flashing kit (if specified), otherwise use Code 4 (nominally 1.8mm thick) flashing lead Cill flashing Flashing length Fig. 4 Cill flashing in position 10
Step 5. Silicone the cill flashing Stage 2 Fitting the Pitchglaze If performing a dry run, omit the silicone from this step. Run a continuous thick bead of silicone along the cill, between the aperture and the cill tilting fillet (fig. 5a) Use the silicone supplied as standard with the Pitchglaze Silicone along cill of aperture Fig. 5a Cill siliconed for cill flashing Place the cill flashing in position - brass or stainless steel nails (not supplied) can be used to tack the lead in place in the area that will be overlapped by the Pitchglaze Run a continuous thick bead of silicone along the flashing, up the jambs and across the head as shown (fig. 5b) Silicone around head, jambs and cill of aperture Fig. 5b Aperture siliconed for Pitchglaze 11
Step 6. Place the Pitchglaze in position Two alternatives are laid out in this step, read both before continuing. These products can be very heavy. Due consideration should be given to getting the product onto the roof safely and extreme care taken during installation. Place the Pitchglaze centrally over the aperture (fig. 6a) Adjust the Pitchglaze to its final position screws through some of the fixing holes into the rafters below can be used to temporarily hold the Pitchglaze in place (fig. 6b) Clean away any excess silicone Fig. 6a Pitchglaze placed in position Fixing holes Fig. 6b Fixing holes of Pitchglaze 12
Alternatively, a jig can be fashioned to hold the Pitchglaze in place as shown, refer to the sales drawing for relevant dimensions (fig. 6c & 6d) Weight of Pitchglaze supported by horizontal member Example jig See warnings below Fig. 6c Example of jig that could be used to place Pitchglaze The fixings holding the jig in place on the roof must not pierce the cill flashing. The jig must not pinch the cill flashing. Weight of Pitchglaze supported by jig on this edge - see warnings above Fig. 6d Close-up of Pitchglaze showing edge to be supported by jig These products can be very heavy. Glazing Vision strongly recommend that a structural engineer is consulted when designing any structure(s) that will support the Pitchglaze. Nothing in this manual constitutes a structural proposal. 13
If performing a dry run, the position of the Pitchglaze can be marked and the Pitchglaze removed. The installation can then begin. Step 7. Fix the Pitchglaze in position Do not remove any temporary screws that are holding the Pitchglaze in place. Complete this step with the remaining fixing holes. Then remove the temporary screws and repeat this step for those fixing holes. All fixing holes should be siliconed. Using the Pitchglaze fixing holes as a guide, drill a pilot hole for each fixing screw Inject silicone through each fixing hole into the pilot hole and between the layers of the folded back roofing underlay to prevent water ingress Install and tighten the fixing screws through the wet silicone Use the silicone and screws supplied as standard with the Pitchglaze Fill fixing and pilot holes with silicone Install fixing screws through wet silicone Fig. 7a - Injection of silicone Whilst still wet, excess silicone can be removed by spraying on a small amount of soapy water and wiping with a cloth or paper towel. Fig. 7b - Fixing screws 14
Step 8. Silicone the head and jambs Run a continuous thick fillet of silicone along the entire length of the jambs and head as shown Fill the countersinks of the fixing holes with silicone leaving the surface flush Use the silicone supplied as standard with the Pitchglaze Fig. 8a Head, jambs and fixings siliconed Screw heads siliconed over Continuous fillet of silicone around head and Fig. 8b Head, jambs and fixings siliconed 15
Stage 3 Weathering Step 9. Apply Butyl tape to the jambs Apply butyl tape to the full length of the gutter lip on both sides as shown Use butyl tape supplied as part of the flashing kit (if specified) otherwise use approx 1.5mm double sided butyl tape Fig. 9a Butyl tape applied to jambs Apply butyl to full length of gutter lip Lay butyl tape over gutter lip Fig. 9b Butyl tape applied to jamb 16
Step 10. Place the jamb aprons in position Place the jamb aprons in position as shown The apron should be at least 150mm longer than the outside span of the Pitchglaze The bottom edge of each apron should lap over the cill flashing The bottom edge of each apron should align with the bottom edge of the Pitchglaze cill The aprons may be tacked in position to the rafters/counter battens below For the jamb aprons, use the roofing underlay supplied as part of the flashing kit (if specified) otherwise use roofing underlay of at least 1m in width Difference of at least 150mm Length of jamb apron Fig. 10a Jamb aprons positioned Bottom edge of jamb apron to align with cill edge of Pitchglaze and overlap cill flashing Fig. 10a Jamb apron adhered to butyl tape 17
Step 11. Batten up the jambs Batten to either side of the Pitchglaze as shown The battens should be fixed in place ready for tiling/slating Fig. 11 Jamb battens installed Step 12. Install the head tilting fillet Install the tilting fillet as shown (not supplied) Glazing Vision recommends a hardwood or treated softwood fillet is used Fix the fillet to the rafters Head fillet Fig. 12 Head tilting fillet 18
Step 13. Install the head flashing Install the head flashing as shown The flashing should be at least 300mm longer than the external width of the Pitchglaze and should be installed centrally Use the lead flashing supplied as part of the flashing kit (if specified), otherwise use Code 4 (nominally 1.8mm thick) flashing lead Head flashing Fig. 13a Head flashing installed Head flashing tucked into head gutter of Pitchglaze Head flashing tucked underneath battens Fig. 13b Head flashing installed 19
Step 14. Install the head apron Place the head apron in position as shown The apron should cover the tops of both jamb aprons entirely The bottom edge of the apron should lap over the head flashing by at least 50mm The top edge of the apron should lap under the underlay of the roof by at least 50mm If the underlay supplied/recommended does not reach then a second piece should be used as an intermediary, lapped over the original piece and lapped under the underlay of the roof For the roof apron, use the roofing underlay supplied as part of the flashing kit (if specified), otherwise use roofing underlay of at least 1m in width The head apron must be lapped into the roof underlay as described in this step. Refer to sales drawing for details. Head apron lapped over head flashing Fig. 14 Head apron installed 20
Step 15. Batten the head Batten the roof above the Pitchglaze Fig. 15 Battens above the head installed Stage 4 Tiling Before tiling, take the opportunity to check the weathering (overlap) of the aprons and flashings and to check the silicone sealing the jambs. Step 16. Tile up to the cill Tile up to the batten below the Pitchglaze Fold and boss the cill flashing into final position Fig. 16 Cill tiled and cill flashing finished 21
Step 17. Prepare the soakers The soakers should tuck approximately 100mm between the tiles/slates as shown The soakers should touch the inside of the hidden gutter of the Pitchglaze as shown The soakers should overlap by at least 50mm as shown Use the flashing lead supplied as part of the flashing kit (if specified), otherwise use Code 4 (nominally 1.8mm thick) flashing lead. Fig. 17a Example of installed soakers for interlocking tiles 22
This area to sit between tiles Top end Length = gauge + lap of tiles 100mm approx Flange folded around top of tile to hold soaker in place Bottom end This edge to sit in gutter of roof window Fig. 17b Example of soaker Glazing Vision strongly recommends that the manufacture and installation of soakers is carried out by a competent lead-worker. Fig. 17a & 17b are presented only as an example. The soakers described in step 17 may not be suitable for your roof. 23
Step 18. Tile up the jambs Tile to either side of the Pitchglaze, installing the soakers Fig. 18 Jambs tiled and soakers installed Step 19. Tile the head Tile above the Pitchglaze Glazing Vision recommends that eaves tiles are used immediately above see sales drawing Eaves tiles are recommended for use immediately above the Pitchglaze see sales drawing Fig. 19 Roof tiled above the head 24
Interior Finishing The inside edge of the foam tape is designed to remain flush with the surface of the interior finish. Glazing Vision stipulates that the following details are observed when completing your internal finishes: The finish must be built out to at least 19mm beyond the aluminium frame of the Pitchglaze. No interior metal component (for example edging strips for plastering) may touch or be in close proximity to the aluminium frame of the Pitchglaze. Contravention of either of these stipulations will severely undermine the thermal efficiency of the Pitchglaze. Double glazed unit Powder coated aluminium frame Factory applied insulating foam tape Structural trimmer (by others) Surface of internal finish (by others) Fig. F Section detail of double glazed unit - see sales drawing 25
Conformity EN 14351-1:2006+A1:2010 For more, refer to the separate declaration of performance documentation, or see the marking affixed to the Pitchglaze. For technical support please call 01379 658300 or visit us at www.glazingvision.co.uk/resources or email us at technicalsales@glazingvision.co.uk 26