BS 8213-4:2007
$167.15
Windows, doors and rooflights – Code of practice for the survey and installation of windows and external doorsets
| Published By | Publication Date | Number of Pages |
| BSI | 2007 | 38 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | Contents 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Materials 3 5 Surveying for replacement windows and doorsets 4 6 Surveying for new build 9 7 Removal of existing windows and doorsets 9 8 Installation 11 Annexes Annex A (informative) Typical checklists 22 Annex B (informative) Window and doorset removal techniques 24 Annex C (informative) Examples of replacement frame position and joint construction 27 Bibliography 31 List of figures Figure 1 – Measurement of flat windows and doorsets 7 Figure 2 – Fixing positions for PVC-U windows and doorsets 13 Figure 3 – Fixing distances for timber windows and doorsets 14 Figure 4 – Fixing distances for aluminium windows and doorsets 15 Figure 5 – Setting and location block position 19 Figure A.1 – Typical surveyor’s checklist 22 Figure A.2 – Typical final inspection checklist 23 Figure B.1 – Cutting through transoms and mullions 24 Figure B.2 – Cutting through the outer frame 25 Figure C.1 – Flush reveal with joint width less than 6 mm and frame bridging DPM 27 Figure C.2 – Flush reveal with joint width from 6 mm to 15 mm and frame bridging DPM 27 Figure C.3 – Flush reveal with external render, for replacement frames 28 Figure C.4 – Flush reveal with external render, for replacement windows/doorsets with frame shuffled into position 28 Figure C.5 – Box sash replacement 29 Figure C.6 – Frame forward of DPM 29 Figure C.7 – Sub-sill arrangement 30 Figure C.8 – Head arrangement 30 List of tables Table 1 – Recommended deductions from structural opening sizes 8 |
| 5 | Foreword |
| 7 | 1 Scope 2 Normative references |
| 8 | 3 Terms and definitions 3.1 bow window 3.2 door assembly 3.3 doorset 3.4 dormer window 3.5 DPM (damp-proof membrane) 3.6 finishing 3.7 fixing 3.8 frame 3.9 installation packer 3.10 installer 3.11 lintel |
| 9 | 3.12 manufacturing size 3.13 oriel window 3.14 structural opening 3.15 structural opening size 3.16 structure 3.17 surveyor 3.18 system supplier 4 Materials 4.1 Fixings 4.2 Sealants |
| 10 | 4.3 Finishing trims 5 Surveying for replacement windows and doorsets 5.1 General |
| 11 | 5.2 Suitability of the aperture 5.3 Services in the aperture 5.4 Weathertightness |
| 12 | 5.5 Lintels 5.6 Bow, oriel and dormer windows 5.7 Coupled/combination frames 5.8 Opening type and direction 5.9 Doorsets |
| 13 | 5.10 Brickwork removal 5.11 Drainage 5.12 Decorative glass 5.13 Measurement Figure 1 Measurement of flat windows and doorsets |
| 14 | 5.14 Surveying a window or doorset in a check reveal 5.15 Manufacturing sizes Table 1 Recommended deductions from structural opening sizes Dimensions in millimetres |
| 15 | 5.16 Installation techniques 6 Surveying for new build 7 Removal of existing windows and doorsets 7.1 General |
| 16 | 7.2 Safety a) When handling glass, all operatives should wear eye protection, safety footwear and appropriate hand and wrist protection. b) All electrically powered tools should either: c) A safe working platform to give safe access to the structural openings is essential. |
| 17 | d) When operating a grinding disc, the following safety precautions should be observed. e) Old windows and doorsets and other debris should always be stored and disposed of safely. 8 Installation 8.1 General 8.2 Methods of fixing |
| 18 | 8.3 Fixing distances 8.3.1 General 8.3.2 PVC-U windows and doorsets a) Corner fixings should be between 150 mm and 250 mm from the external corner. b) No fixings should be less than 150 mm from the centre line of a mullion or transom. c) There should be a minimum of two fixings on each jamb and sill, with intermediate fixings at centres no greater than 600 mm. d) If the head is fixed with polyurethane foam, then the fixings at the head may be as follows: |
| 19 | Figure 2 Fixing positions for PVC-U windows and doorsets 8.3.3 Timber windows and doorsets a) Corner jamb fixings should be between 150 mm and 250 mm from the external corner. b) Intermediate fixings should be at centres no greater than 600 mm. c) There should be a minimum of two fixings on each jamb. d) On windows and doorsets over 1 800 mm wide, central head and sub-sill fixings should be provided. |
| 20 | Figure 3 Fixing distances for timber windows and doorsets 8.3.4 Aluminium windows and doorsets a) Corner jamb fixings should be between 100 mm and 150 mm from the external corner. b) No fixings should be less than 100 mm from the centre line of a mullion or transom. c) Intermediate fixings should be at centres no greater than 600 mm. d) There should be a minimum of two fixings on each jamb. e) On windows and doorsets over 1 800 mm wide, central head and sub-sill fixings should be provided. |
| 21 | Figure 4 Fixing distances for aluminium windows and doorsets 8.3.5 Steel windows and doorsets a) 175 mm from corners, and then at 750 mm intervals, for steel frames of hot rolled solid section; b) 200 mm from corners, and then at 900 mm intervals, for steel frames of cold formed hollow section. 8.4 Fixing lugs 8.5 Finishings |
| 22 | 8.6 Coupled assemblies 8.7 Replacement windows and doorsets 8.7.1 General 8.7.2 Frame position a) The new frame should bridge the DPM. Any damaged DPM should be repaired. b) The frame should be set as far back in the reveal as is feasible for better weather performance. c) The correct movement gap should be provided. 8.7.3 Open cavities |
| 23 | 8.7.4 Replacement of box sash windows a) When replacing a window into the original check reveal, the window should be fitted from the inside, with the outer frame hidden behind the brickwork. b) Packing should be placed at the ends of the sill to transfer the weight of the replacement sash window into the structure, without bowing the sill member. A bowed sill will result in the hardware not engaging. c) It is essential that the window be fitted level, without twist and with parallel jambs. Jambs bowing outward will make the sa… d) Expanding foam can be used as an aid to the mechanical fixings, but great care should be taken not to bow the outer frame jam… 8.7.5 Installation packers 8.7.6 Finishing off and making good |
| 24 | 8.8 New build 8.9 Glazing 8.9.1 General |
| 25 | Figure 5 Setting and location block position |
| 26 | 8.9.2 Glazing methods 8.10 Sealing |
| 27 | 8.11 Final inspection |
| 28 | Annex A (informative) Typical checklists A.1 Surveyor’s checklist Figure A.1 Typical surveyor’s checklist |
| 29 | A.2 Final inspection checklist Figure A.2 Typical final inspection checklist |
| 30 | Annex B (informative) Window and doorset removal techniques B.1 Removal of putty-glazed fixed light glazing B.2 Removal of frame B.2.1 General B.2.2 Timber windows and doorsets Figure B.1 Cutting through transoms and mullions |
| 31 | Figure B.2 Cutting through the outer frame B.2.3 Box-sash windows a) Remove the mitred beading from around the frame. b) Carefully cut the sash cords to release and lower the weights. c) Remove the bottom sash, then take off the parting bead and take out the top sash. d) Cut the outer frame from the aperture, leaving the horns in the structure. e) Remove the counterweight from the sash box. f) Remove the sub-sill, if this is not part of the outer frame. B.2.4 Metal windows and doorsets a) For metal windows and doorsets fixed through the frame into timber sub-frames or direct into the aperture: 2) locate the screws holding the metal frame in place and remove them; 3) remove any timber sub-frame as described for timber windows and doorsets (B.2.2). |
| 32 | b) For metal windows and doorsets set directly into the brickwork or concrete held in place by lugs attached to the outer frame: 2) cut through any transoms and mullions and remove them; 3) remove the screws from the frame by drilling out the heads or by driving them through the frame using a suitable punch; 4) cut through each side of the frame with an angle grinder and lever away from the wall, taking care not to damage the fabric of the aperture. B.2.5 Plastics windows and doorsets a) Through-frame fixings can usually be unscrewed to allow the frame to be removed from the aperture. Care needs to be taken to avoid excessive damage to the fabric of the building. b) Where fixing brackets have been used to secure the window or doorset, it is preferable to unscrew the fixings in the fixing b… c) Proprietary fixings might require special instruction from the manufacturer. B.2.6 Sub-sills |
| 33 | Annex C (informative) Examples of replacement frame position and joint construction Figure C.1 Flush reveal with joint width less than 6 mm and frame bridging DPM Figure C.2 Flush reveal with joint width from 6 mm to 15 mm and frame bridging DPM |
| 34 | Figure C.3 Flush reveal with external render, for replacement frames Figure C.4 Flush reveal with external render, for replacement windows/doorsets with frame shuffled into position |
| 35 | Figure C.5 Box sash replacement Figure C.6 Frame forward of DPM |
| 36 | Figure C.7 Sub-sill arrangement Figure C.8 Head arrangement |
| 37 | Bibliography [1] GREAT BRITAIN. Building Regulations 2000. London: The Stationery Office. [2] GREAT BRITAIN. Building (Scotland) Regulations 2004. Edinburgh: The Stationery Office. [3] GREAT BRITAIN. Building Regulations (Northern Ireland) 2000. Belfast: The Stationery Office. [4] GREAT BRITAIN. Construction (Design and Management) Regulations 1994. London: HMSO. [5] GREAT BRITAIN. Control of Substances Hazardous to Health Regulations 2002. London: The Stationery Office. [6] GREAT BRITAIN. Health and Safety at Work etc. Act 1974. London: HMSO. [7] GREAT BRITAIN. Control of Asbestos at Work Regulations 2002. London: The Stationery Office. [8] GREAT BRITAIN. Work at Height Regulations 2005. London: The Stationery Office. [9] GLASS AND GLAZING FEDERATION. Code of practice – Working at heights in the domestic replacement window industry. London: Glass and Glazing Federation, 2006. [10] HEALTH AND SAFETY EXECUTIVE. Height safe – Absolutely essential health and safety information for people who work at height. London: Health and Safety Executive, 2003. |
