EWI to pitched roof with flashing at verge over insulation. [Version ID #117]

Author details

Original Author:Admin Organisation:

Detail summary

Detail for EWI up to an existing verge on a pitched roof. Where not possible to extend the existing roof verge over the insulation install new verge mini-gutter at junction between pitched roof and external wall insulation, with new Stainless steel flashing at junction between flat roof verge and external wall insulation.

Technical description

Section detail. EWI to existing pitched roof verge, with EWI extending beyond. New flashing and verge guttering added to prevent water damage to EWI.

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

  • Stainless Steel Flashings

    Austenitic alloy grade 1.4301 (304). Thickness 0.5mm. Mill finish. wdge fixed into joint chases and DPC joints.

    Contractors choice

  • H71b Lead Sheet Soakers

    Rolled lead sheeting. Soakers 1.50 to 1.75mm (code 3) lead sheet. Dressed over mini-gutter wall

    Contractors choice.

  • Treated softwood verge board

    European Whitewood to classs BS EN942, class J30. Size to suit existing board. Treatment required. Fixed by stainless steel nails at centres according to contractor.

    Contractors choice.

Revisions

  1. Admin - 2015-04-29 14:56:32

    DWG file uploaded. General formatting amendments.

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  2. Admin - 2015-04-29 14:54:27

    DWG file uploaded. General formatting amendments.

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  3. Admin - 2015-03-27 17:01:00

    Preview image and .pdf file updated.

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  4. Admin - 2015-03-24 18:11:49

    General formatting. Introduction expanded. Technical description approved doc links expanded. Notes added. Parts list updated with suppliers links.

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  5. Admin - 2015-03-13 15:45:05

    Technical description updated. Parts list updated with codes and expanded.

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  6. Admin - 2015-03-06 13:14:46

    Version 2. Category change

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  7. Admin - 2015-03-06 13:11:23 [Displayed version]

    First version

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