PHT38 – Passivhaus Twin Stud Timber Frame Window Jamb

Price range: £9.00 through £14.00 + VAT

This detail presents the jamb junction for a triple glazed window (21 Degrees GBS78) within a Passivhaus twin stud timber frame wall. The external wall shows 300mm cellulose insulation between twin studs, external and internal OSB 3 sheathing boards, airtight vapour control layer, and 50mm service zone with mineral wool insulation between vertical timber battens.

The window jamb includes minimum 38mm timber to close the edge of the cavity, vertical cladding board to window reveal, and weatherproof and watertight sealing tape to the outside of the frame. Window straps fixed to the structural engineer’s specification are taped over for airtightness, and the frame back is filled with airtight foam or compressed foam tape. All exposed cut board ends at corners are to be re-treated and finished.

See drawing notes for full information.

Features of this detail: Passivhaus, twin stud timber frame, triple glazed window, 21 Degrees, window jamb, cellulose insulation, airtightness tapes, window straps, cavity closer, weatherproof seal, service zone, vertical battens, thermal bridge free

 

£14.00 + VAT
£9.00 + VAT
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03_01 Passivhaus Twin Stud LR

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