EWI to clipped eaves with room in roof. [Version ID #64]
Detail summary
External wall insulation to a clipped eave detail, where roof insulation is fitted between the roof rafters to form a pitched internal ceiling in roof.
Technical description
Installation of new EWI, cut to fit eaves insulation and form gutter parapet where insulation to roof installed to rafters. New membranes.
Parts list
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Breather Membrane/ Roof-underlay
Installation: Sealed to insulation to eaves 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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Insulation Boards Or Batts Fitted Between Rafters
Formaldehyde Free Glass mineral wool semi rigid batts friction fitted between rafters. / Thermal Conductivity: 0.032W/mK / GWP : 0 / Thickness: 35 mm less than rafter depth. / Width: To suit rafter spacing.
Knauf. / www.knaufinsulation.co.uk / Reference: DriTherm Cavity Slabs.
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Insulated Dry-Lining Board
Type: Phenolic foam backed plasterboard. / Thermal Conductivity : 0.020W/mK. / GWP : <5. / Insulation thickness: As required to meet target U-value (80mm where 35-75mm mineral wool insulation, 60mm where 75-100mm mineral wool insulation, 50mm where 100mm + mineral wool insulation). / Thickness: 12.5mm. / Vapour Control: Integral Vapour Control Layer - ensure all joints between sheets detailed and taped to minimise vapour transmission using vapour-tight tape.
Kingspan Insulation Ltd. / www.kingspaninsulation.co.uk / Reference: Kooltherm® K18 Insulated Plasterboard.
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Insulation to Eaves (rigid)
Phenolic Foam. / Thermal conductivity: 0.023W/m2k. / Thickness: 50mm. / Width: cut to suit rafters. / Installation: Continuous with roof insulation, no gaps, to avoid cold bridging. Friction fit between rafters.
Contractors choice
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Insulation to eaves (flexible) to fill gaps
Woodfibre off-cuts from EWI/ IWI etc. / Installation: Apply to any gaps between wall plate/ top of wall and rigid insulation to ensure continuity and avoid air movement.
Unger. / www.unger-diffutherm.de / Reference: Diffutherm.
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Ventilation path from loft space (for HR membranes)
Polycarbonate sheeting - equivalent to 10mm continuous ventilation gap
Contractors choice
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Gutter System
Profile: As drawing. / Gauge: 1.2mm minimum. / Joining : Joins to be avoided where possible. If required must be fully welded and tested. Could be glued and blind riveted subject to approval. / Size: Contractor's choice - to suit existing roof dimensions and cover depth of external wall insulation. / Ensure provides adequate capacity for rainwater discharge from roof. / Finish As Delivered: Self Finished Stainless Steel Grade 304. / Setting Out : To falls. / Fasteners : As manufacturer's recommendations. / Accessories: Welded stop ends. / Testing: Test on completion.
Contractors choice
Revisions
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Admin - 2015-04-29 09:29:02
DWG file updated. Contact details updated for EWI to include Back To Earth. Formatting changes.
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Admin - 2015-04-29 09:26:58
DWG file updated. Contact details updated for EWI to include Back To Earth. Formatting changes.
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Admin - 2015-03-27 16:17:15
Preview image and .pdf file updated.
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Admin - 2015-03-23 13:03:26
Introduction expanded with target u-values. Technical description updated with more detailed construction sequence and BS/approved doc links. Parts list updated with links/codes. General re-formatting.
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Admin - 2015-03-23 12:58:32
Introduction expanded with target u-values. Technical description updated with more detailed construction sequence and BS/approved doc links. Parts list updated with links/codes. General re-formatting.
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Admin - 2015-03-13 18:02:12
Technical description updated with installation sequence.
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Admin - 2015-03-12 12:44:18
Version 7- Title, description and technical description updated and expanded. BS and Approved doc information added. Parts list updated.
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Admin - 2015-03-12 12:43:01
Version 7- Title, description and technical description updated and expanded. BS and Approved doc information added. Parts list updated.
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Admin - 2015-03-03 12:02:55 [Displayed version]
Parts list updated
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Admin - 2015-03-03 11:57:19
Parts list updated
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Admin - 2015-03-03 11:42:18
Preview file updated. Parts list added.
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Admin - 2015-02-27 12:16:13
Version 2- .dwg file updated
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Admin - 2015-02-26 14:34:32
Second version - Change to summary text.
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Admin - 2015-02-26 14:32:04
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
-
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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