EWI to eaves, flush with window head [Version ID #167]
Detail summary
New EWI to eaves where existing overhanging eaves will meet the head of an new replacement window, fitted into the depth of new EWI. Detail for the insulating of the existing space above the soffit up to the underside of new phenolic eaves insulation.
Designed to deal with potential cold bridge at eaves - where loft or roof insulation meets cavity or other wall insulation. New EWI to join to overhanging eaves insulation directly above window.
Technical description
Section detail. EWI to eaves with large overhang, existing eaves flush with head of window, new phenolic foam insulation above to join to EWI. Window replacement with triple glazed window with new timber frame.
All new replacement timber windows to BS 644, operation and strength characteristics to BS 6375-2. All timber members in windows to BS EN 942. Glazing beads clear finish to Class J2.
Tiling work: Clay tiles to BS EN 1304/ concrete (non interlocking) to BS EN 490. All battens/counterbattens and ridge/hip fixing battens to be timber species to BS 5534, Clause 4.12.1. All fasteners to BS 1202 as appropriate to fastener type
Existing guttering to be replaced/reinstated to BS EN 607, and BS EN 1462, Kitemark certified, clauses 3–7 and National Annexes. Collection and distribution of rainwater: Complete, and without leakage or noise nuisance. Reference should be made to Approved Document H (drainage and waste disposal) and Document F (ventilation)
Care should be taken to ensure air-tightness. Seal all service penetrations through EWI and existing wall. Lap and tape all membranes around edges of EWI system.
All insulation to be continuous to avoid thermal bridging.
Preparation of external wall: Remove any existing loose material and prepare in accordance with manufacturer's requirements.
Any alterations to drainage and other fixtures, or work to prepare the substrate, to be agreed with contract administrator prior to work being undertaken. Prior to start on site inspect the form and condition of the structural substrate; institute repairs and/ or additional works necessary to make the substrate suitable to receive EWI system.
Parts list
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New Timber frame, triple-glazed windows [GD01]
Eco-Contract Ultra Outward Opening Casement Windows.\ Thermal Performance (overall u-value) : 0.79W/m2K.\ Air-tight Size: As schematic.\ Opening Pattern/ Configuration : As existing (unless otherwise stated on schematic).\ Sash/Frame Material: FSC 100% Redwood.\ Drip Rail : Aluminium. \ Finish - Interior: Factory finished paint/varnish system.\ Finish - Exterior: Factory finished paint/varnish system. \ Glazing Unit : Triple, Argon Fill, 44mm. \ Glazing Type: as standard triple glazed unless stated: Light transmission : 72%. \ Solar factor (g): 52%. \ Handle Type: Manufacturer's standard, factory fitted. \ Security: Secured by Design.\ Accessories: Egress Hinges and Child Safety Restrictors. \ Guarantees: Manufacturer's standard.
Contacts: Manufacturer: Green Building Store. \ www.greenbuildingstore.co.uk \ Tel: +44 (0)1484 461705. \ Reference: Eco-Contract Ultra Outward Opening Casement Windows
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External Wall Insulation (Woodfibre), rendered finish [EW01]
For use on solid and hard to treat cavity walls. Composite woodfibre board. UdiTherm SK back board, Diffutherm NF (T&G, renderable) top board. \ Fixed mechanically to substrate in accordance with manufacturers recommendations. \ Base Coat - levelling on substrate: 90% contact required around edge of boards between board and substrate to prevent thermal bypass. If substrate is very uneven, use base-coat material around edge of board to achieve contact. \ Thermal conductivity: 0.045W/m2K. GWP 0.
Unger \ www.unger-diffutherm.de \ Reference: UdiFRONT. \ Render: UDI Perl
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Insulation to Eaves (rigid) [RF06b]
Phenolic foam. \ Thickness: 50mm. Width: cut to suit rafters. Length: 750mm PLUS distance to eaves board OR 200mm (whichever is smaller). \ Thermal conductivity: 0.023W/m2k. \ Installation: Continuous with roof insulation, no gaps, to avoid cold bridging. Friction fit between rafters from inside loft, being careful not to damage existing roof membrane or structure or block existing ventilation paths.
Contractors choice
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Breathable Membrane/ Roof Underlay [RF06c]
Sealed to phenolic foam insulation and dressed to drainage point at the end of each run of guttering to allow water to exit construction.
Green Building Store / Reference: Solitex UM
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Double/Single-sided air seal tape [DP09b/a]
Tape for junctions critical to air-tightness. 60mm (typical). \ Accessories: ORCON F sealant and TESCON PRIMER RP (for use on rough/old surfaces to assist adhesion)
Pro Clima \ http://www.greenbuildingstore.co.uk/page--pro-clima-airtightness-tapes-options.html \ TESCON VANA/ TESCON PROFIL (single sided) \ Contega L (double sided)
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Insulation to Eaves (Flexible) [RF06c]
Woodfibre offcuts from external wall insulation. Insert into gaps between wall plate/top of wall and rigid insulation to ensure continuity and avoid air movement.
Unger \ www.unger-diffutherm.de \ Reference: Diffutherm
Revisions
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Admin - 2015-04-29 09:59:16
DWG uploaded. General formatting changes.
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Admin - 2015-03-27 16:20:50
Preview image and .pdf file updated.
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Admin - 2015-03-27 12:15:54
Codes updated. Intelligent vapour layer added to parts list.
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Admin - 2015-03-23 14:42:25
General formatting. Technical description updated, links added and installation sequence updated. Parts list amended and codes added. Links to suppliers added.
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Admin - 2015-03-23 14:38:26
General formatting. Technical description updated, links added and installation sequence updated. Parts list amended and codes added. Links to suppliers added.
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Admin - 2015-03-12 15:22:19 [Displayed version]
Version 6. Triple glazed windows updated with FAB code
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Admin - 2015-03-12 15:21:20
Intro/summary updated, technical description updated and expanded. BS and Approved doc information added. Parts list added.
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Admin - 2015-03-03 15:02:42
Parts list added. Preview image updated.
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Admin - 2015-02-27 12:20:29
Version 2- Title and .dwg file updated
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Admin - 2015-02-26 15:25:46
Second version - Example image uploaded
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Admin - 2015-02-26 15:24:04
First Version
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For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
- Ease of understanding detail: Easy
- Ease of sourcing materials: Easy
- Ease of sourcing skills: Easy
- Ease of implementation: Easy
- Overall cost: Low cost
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User name
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
- Ease of understanding detail: Easy
- Ease of sourcing materials: Easy
- Ease of sourcing skills: Easy
- Ease of implementation: Easy
- Overall cost: Low cost
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User name
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
- Ease of understanding detail: Easy
- Ease of sourcing materials: Easy
- Ease of sourcing skills: Easy
- Ease of implementation: Easy
- Overall cost: Low cost
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For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
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