Thermal bridging considerations - EWI

View 11 of Address
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Customer
Address
Postcode
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12 WALWYN AVENUE BROMLEY KENT
BR1 2RD
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View 2 of Retrofit roles
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Role
Name & license number
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Retrofit Assessor
Peter Given 1804132
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Retrofit installer
AMJ Contracts 2259201
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Retrofit designer
David Manns 1950617
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Retrofit evaluator
Alex Woodcraft 1996944
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Retrofit co-ordinator
Alex Woodcraft 1996944
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External wall insulation needs to be carefully considered and specified before installation. The following is an analysis and a suggestion for design.
External INSULATION FOR SOLID WALLS
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Specification
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DESCRIPTION
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The house will need to be insulated from the outside. There is a suggested sequence and specification below but this will need to be agreed with the installer and the client. Thermal bridges detailed below.
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LOCATION
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All solid walls to be insulated
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EXISTING FORM / CONDITION
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The walls are rendered at the front and rear
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ESTIMATED U-VALUE
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Currently 2.06 W/m²K aiming for 0.41 W/m²K
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ROOF LINE
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The front of the house has sufficient overhang for the insulation to be fitted underneath. The roofs at the rear of the house are to be extended out to avoid the use of verge trims and allow the use of the green detail below.
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Thermal bridges present 2
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Location
Type of bridge
Mitigation
1
Join with neighbouring house
Linear
design
2
Join with roof of house
Linear
Use green insulation detail below
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Join with roof of extension
Linear
Use amber insulation detail below
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Ground level
Linear
Use amber insulation detail below
5
Around windows
small area
slim insulation in reveal
6
Around doors
small area
slim insulation in reveal
7
Bay window
Linear
slim insulation in reveal
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7
Count
Thermal bridging details to be used for this project
Roof of house
image.png
Roof of extension
image.png
Ground level
image.png
Around windows and doors
image.png
External-wall-insulation-specification-for-weathering-and-thermal-bridge....pdf
2.6 MB

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