IWI to retained window with secondary glazing [Version ID #82]
Detail summary
An IWI detail to head and jamb of an existing window (single glazed or other) where a a secondary double glazed window unit is to be added to the inside face of the window for improved thermal performance.
Technical description
Section Detail. IWI to secondary glazing, set within existing frame.
Psi cill value: 0.03W/m2k. Psi lintel valueL 0.03 W/m2k. Target wall value: 0.3W/m2k.
Preparation: Cills and framing : Remove existing internal cills and framing to window. Plaster : Where existing plaster is gypsum-based, or where space is required, remove existing plaster finish.
Parts list
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Insulated Dry-Lining Board to window jambs and head
Phenolic Foam Thermal Plasterboard with integral vapour control layer (plasterboard thickness: 12mm, insulation: 17mm thickness). Tapered edge. \ U-value: 0.21W/m2k. GWP<5. \ Adhesive scored bonding coat to ensure no air-gap to rear of board. Taped and filled joints. Prepared for plaster skim coat finish.
Kingspan Insulation Ltd \ Kooltherm® K17 Insulated Plasterboard
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Rigid insulation below cill
Rigid insulation board. Thickness: 15-24mm (to suit window frame/ opening). \ U-value: 0.023W/m2k
Kingspan Insulation Ltd \ Kooltherm® K3 Floorboard
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Softwood Window Board to Sill
Subject to contractor. Half-round edge. European redwood. Class 2 to BS 1186-3. Natural finish. No preservative treatment. FSC certified. Fixed with lost nail heads at 30mm centres
Contractor choice.
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Internal Wall Insulation System (95mm)
Earthwool Eco batt insulation. Thickness 95mm\ Target u-value: 0.3W/m2k. Thermal conductivity: 0.033W/m2k/ 0.130W/mk. GWP<5. \ Fixing: In accordance with manufacturer's recommendations. Supports: EcoStuds - XPS and OSB uprights.
Knauf \ ThermoShell Internal Wall Insulation System
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Single-sided air seal tape
Tape for junctions critical to air-tightness. 60mm (typical). \ Accesssories: 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 (2 release tapes)
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Intelligent membrane- Vapour Control Layer
Intelligent breather membrane. \ Fixing: Laps And Edges: Sealed with vapour-tight adhesive tape. At junctions with party/patition walls, lap under insulated plasterboard. At floor and ceiling junctions ensure is appropriately sealed.
Pro-clima \ Intello membrane
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Secondary Glazing Systems - Proprietary Product
Secondary glazing. \ Horizontal slider, heavy duty frame. \ Glazing : 20 mm low-e coated argon filled double glazing unit with warn edge spacers – toughened inner pane. \ White semi-gloss polyester powder coated.
Duration Group \ www.duration.co.uk \
Revisions
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Admin - 2015-04-30 10:17:14
DWg file uploaded. General formatting changes.
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Admin - 2015-03-30 12:03:25
Preview image and detail pdf updated.
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Admin - 2015-03-29 11:13:53
IWI supports added to parts list
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Admin - 2015-03-29 11:06:13
IW05b "insulated dry-lining board" replaced with "laminate plasterboard
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Admin - 2015-03-26 23:02:29
General re-formatting. Introduction adjusted. Technical description updated and expanded with additional BS codes and approved docs. Parts list updated with suppliers links.
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Admin - 2015-03-16 13:54:25
Introduction, and technical description updated with BS and approved docs. Parts list expanded and codes added.
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Admin - 2015-03-03 17:28:59 [Displayed version]
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
-
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
Feedback summary
- 80% of users found this detail easy to implement.
- 50% of users found it easy to source skills for this detail.
- 60% of users found this detail hard to understand.
- 100% of users found the overall cost for this detail to be low.
- 90% of users found materials for this detail easy to source.
Discussion
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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