Insulation to eaves(internal install) junction with wall insulat [Version ID #83]
Detail summary
Insulation designed to deal with potential cold bridge at eaves - where loft or roof insulation meets cavity, or other wall, insulation. Ventilation gap of 35mm provided over eaves ventilation.
Technical description
Section detail. Roof & Loft insulation. To eaves. Installed internally at junction with wall insulation.
Loft insulation increased to 400mm depth - recycled formaldehyde free glass fibre loft roll with breather membrane topping to reduce thermal bypass. In cases of existing insulation: inspect for damage, leave in-situ if acceptable conditiion and overlay with new insulation.
Installation: Roll back existing loft insulation to reveal junction between ceiling and roof. Remove any debris. Ensure gap between rafters is clear to either eaves board or 200mm beyond outer edge of wall (where no eaves board), whichever is the smaller. Glue battens to upper surface of the cut insulation boards 100mm in from each edge. On leading edge of the slab taper batten thickness to minimise risk of obstruction on installation. Once glue has set, push slabs into the gap over the top of the sole plate up to the eaves board or 200mm past whichever is the smaller. Reinstate loft insulation to underside of rigid insulation.
Parts list
-
Loose laid loft insulation
Flexible formaldehyde free glass mineral wool. \ 85% (minimum) to BS EN ISO 14021. \ Thermal Conductivity : 0.040 W/mK. \ GWP 0. \ Insulation cover should be even and continuous, right to the eaves. Ensure meets any eaves insulation and/or internal wall insulation to prevent cold bridge at eaves without blocking any ventilation paths required to loft space/ roof space.
Knauf \ Reference: Knauf Earthwool loft roll 40
-
Breather Membrane/ wind-tight layer
Membrane, laid over top of loft insulation to prevent thermal bypass - joints to be lapped and taped.
Tyvek \ http://construction.tyvek.co.uk/Tyvek_Construction/en_GB/products/wall/housewrap.html \ Reference: Tyvek Housewrap
-
Insulation to Eaves (rigid)
Phenolic foam. \ 50mm thickness, cut to suit rafters. Length: 750mm PLUS distance to eaves board or 200mm (whichever smallest). \ Thermal conductivity: 0.023W/m2k.
Contractors choice
Revisions
-
Admin - 2015-06-25 13:50:14
| -
Admin - 2015-06-25 13:49:00
| -
Admin - 2015-04-30 13:12:23
Title amended. Intro summary description amended.
| -
Admin - 2015-04-30 11:30:09
Amendments to intro summary for clarity.
| -
Admin - 2015-04-30 10:37:27
DWG and pdf file updated. General formatting amendments.
| -
Admin - 2015-04-30 10:36:33
DWG and pdf file updated. General formatting amendments.
| -
Admin - 2015-03-30 11:16:21
Preview image and pdf detail file updated.
| -
Admin - 2015-03-28 17:27:45
Insect mesh added to parts list
| -
Admin - 2015-03-17 17:12:15
Approved documents and links added to Technical description.
| -
Admin - 2015-03-17 16:11:24
Version 4- Parts list codes amended to remove errors.
| -
Admin - 2015-03-17 16:08:28
Title amended to match drawing. Introduction amended with u-values. Technical description content updated and expanded; format altered. Parts list expanded with codes, and format amended.
| -
Admin - 2015-03-04 13:41:07
Second version: title updated
| -
Admin - 2015-03-04 12:57:02 [Displayed version]
First version
|
Feedback
A total of 14 users have left feedback about this detail.
Share your thoughts about this detail with other users:
-
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
-
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.
User name
Leave a comment