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Spec for External Wall Insulation & Rain Screen Cladding
This is my site Written by admin on May 3, 2010 – 11:01 am

Rain Screen Cladding Specification

Starting point is brick cavity wall.

Render Cladding

The rendering is done first before installing the rainscreen cladding above it. Note, there is a gap between the galvanised lath and the insulation.

A: Celotex Insulation 110mm

B: Counter Batten 50x38mm is fixed in place by Helifix Fixings 230x8mm fixings at 250mm intervals (for tiles) and 300mm intervals (for render). Counter battens fixed at 400mm centres.

(Not shown) Main Wall fixing for Celotex insulation 5 per board.

C: Breathable membrane (Klober permo forte)

E: Weber Galvanised lath 2.44m x 1.22m

F: Render

H: Weber Full System base bead (size to accomodate 110mm+38mm+lath+render)

J: Existing DPC extended (L)

K: Stop Batten to support batten (B) (not shown)

M: Coated Extruded Polystyrene

(Not Shown) (M) will also have batten, lath and render.

Tile based Rainscreen Cladding

A: Celotex Insulation 110mm

B: Batten 50x38mm fixed in place by Helifix Turbo Fast 8 220x8mm fixings at 250mm intervals (for tiles) and 300mm intervals (for render).

(Not shown) Main Wall fixing for Celotex insulation 5 per board.

C: Breathable membrane (Klober permo forte)

D: Batten applied over membrane (C) and screwed to batten (B)

The tile cladding is then applied to the batten (D). Cedar cladding will only be applied to the top of the ground floor window. Render will be applied underneath.

G: A stop batten is attached to support the battens (B) (How is this attached to the wall ? What size ?

(Not shown) The last cedar board is pushed out by an arris cut horzontal batten.

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2 Responses »

  1. a very detailed article with some nice, illustrative diagrams. thanks

  2. There is a good illustration of how external insulation fits in at the soffit level here: http://bit.ly/d6OKuZ

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