Cold Flat Roof Ventilation Requirements

Til r pitched roof insulation board.

Cold flat roof ventilation requirements. How to ventilate your flat roofing system. In a concrete deck for example this gap could be created by fixing 50x50mm timber battens at 600mm centres and attaching the insulation to underside of these battens. A cold roof is the most common type of roof construction often taking the form of an uninhabited storage space. As low as 25 20 21 00.

Any type of roof from tpo to epdm can be either hot or cold. Effective cold roof ventilation. As low as 15 52 12 93. A qualified roofing contractor will be able to advise on this but here are some of the main guidelines.

Add to wish list add to compare. Condensation encourages rot and mould growth. The answer depends on the type of roof you have. Klober kg9856 in line flat vent.

It depends on where the insulation is installed. As low as 1 20 1 00. A cold roof or hot roof. 2011 code of practice for control of condensation in buildings stipulates that there should be a ventilation gap between the insulation and the bottom of the flat roof deck of at least 50mm.

Ventilation for cold roofs. There must be a slope of 1 80 part h of the building regulations regarding drainage state that water should drain to one or two edges waterproofing should extend up the adjacent walls at least. Roof voids must be ventilated in order to stop warm air condensing on cold surfaces. Duo pitch roofs greater than 200 pitch or greater than 10m span should have additional ventilation at the ridge to assist airflow through the roof void equivalent to at least a 3 mm wide continuous gap.

The wider the span the more free airflow is required in the roof space. The air gap dimensions shown on the drawings are the minimum widths required for clear continuous ventilation air paths at the eaves.