EWI carrying round internal corner [Version ID #189]

Author details

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Detail summary

Standard corner detail for an external woodfibre wall insulation system carrying round an internal corner to a perpendicular wall.

Psi Value: -0.1977 W/mK

Technical description

Plan detail. EWI to internal corner with external perpendicular wall. Continuous insulation around corner to prevent thermal bridging with butted joints between insulation and continuous render over.

SUGGESTED INSTALLATION SEQUENCE: 1.) Cut back rigid board on A to enable perpendicular board to be fixed. 2.) Fix insulation boarding A to existing wall. 3.) Cut back rigid board on board B and fix to butt. 4.) stuff any gaps with woodfibre off-cuts. 5.) Render.

REFERENCE SPECIFICATION:

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

  • External Wall Insulation (Woodfibre), rendered finish [EW01]

    For use on solid and hard to treat cavity walls. Composite woodfibre board. UdiTherm SK back board, Diffutherm NF (T&G, renderable) top board. \ Fixed mechanically to substrate in accordance with manufacturers recommendations. \ Base Coat - levelling on substrate: 90% contact required around edge of boards between board and substrate to prevent thermal bypass. If substrate is very uneven, use base-coat material around edge of board to achieve contact. \ Thermal conductivity: 0.045W/m2K. GWP 0.

    Unger \ www.unger-diffutherm.de \ Reference: UdiFRONT. \ Render: UDI Perl

Revisions

  1. Admin - 2015-04-29 13:42:24

    DWG file uploaded. EW01 parts list contact information added.

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  2. Admin - 2015-03-27 16:40:17

    Preview image and .pdf file updated.

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  3. Admin - 2015-03-24 14:45:54

    General reformatting. Links added to parts list suppliers.

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  4. Admin - 2015-03-13 13:02:30 [Displayed version]

    Title, intro, technical description updated. Parts list added.

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  5. Admin - 2015-02-27 17:11:15

    Version 1

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