Underfloor Ventilation Nhbc

01908 747 255 www nhbc co uk question in relation to external ground levels where should air bricks which provide natural ventilation to under oor voids be positioned.

Underfloor ventilation nhbc.

Telescopic underfloor vent tough adjustable ventilator for ground floors underfloor through wall ventilation 100 timloc strongly recommend that reference is made to the relevant technical information at the end of this section before the products are specified purchased or installed. Nhbc inspection staff have noted and are concerned that the well established best practice of the finished ground level being 150mm below the dpc is being ignored on an increasing number of sites. Ventilation of underfloor voids. Where underfloor voids adjoin ground bearing floors ventilation ducts should be installed.

Air bricks to underfloor voids relationship to ground levels. To help you interpret and apply the nhbc standards we produce the following technical guidance documents. Vapour permeable underlays vpus and roof void ventilation withdrawn december 2016. The timloc airbrick telescopic underfloor vent and extension piece accessories are ideal robust and convenient solutions for providing natural ventilation into underfloor voids.

If necessary pipe ducts should be incorporated in adjoining solid floors separating walls or other obstructions. 0344 633 1000 fax. Nhbc nhbc house davy avenue knowlhill milton keynes bucks mk5 8fp tel.