Beam And Block Floor Ventilation

Adequate cross ventilation to meet nhbc standards and building regulations.

Beam and block floor ventilation.

The installation of a beam and block floor is not usually weather dependent and therefore specifying this form of construction can reduce site delays that other methods might encounter. On shrinkable soil where heave could take place a larger void is required to allow for movement according to the volume change potential. Air bricks should be kept clear of obstructions that could reduce or block the required air ow. This also applies to any internal sleeper walls.

Save time by using this handy calculator to work out how many rytons periscope vents with rytons multifix air bricks are required for suspended timber or block and beam floors. This gives a minimum open area per meter run of wall of 600mm. Air bricks set at or close to ground level may ood and allow rainwater to enter the under oor void. Roughly though one vent per 2 lin m is more than enough.

Also the sleeper walls should be built as honeycomb to allow cross ventillation. Beam block ventilation detail beam block ventilation ventilation must be provided to the void beneath the floor by openings in all external walls at not more than 3m centres. A minimum ventilation void of 150mm should be provided below the underside of precast concrete and timber suspended floors. For vents at ends of beams just position between the beam ends and avoid fiddly lintel detail.

The design for the floor will detail the sqmm of ventillation per sqm of floor and lin m of wall.