Roof Void Ventilation

Ventilation can be accomplished using various products and techniques.

Roof void ventilation.

Water vapour can pass through most building materials and will permeate the roof space through plasterboard ceilings service holes downlight fittings and loft hatches etc. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. To be sure your roof is getting enough ventilation there are simple calculations that you can follow. Airtrak roof void ventilation system airtrak is a proprietary range of ventilators designed specifically for the ventilation of roof voids.

Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. In cold climates snow can enter the soffit and ridge vents melt and potentially cause rot. The outside air that s taken in disperses through higher parts of the roof. A roofing ventilation system works by pulling in air from intake vents that are placed on the lower part of the roof.

Most building codes require a ratio of 1 150 ventilation space to attic floor space. Condensation encourages rot and mould growth. Inadequate venting causes moisture and heat to get trapped in your attic. What is less straightforward is the ventilation of the roof void above.

Beyond the decreased capacity for insulation when venting the roof deck venting the roof deck or the attic has some other drawbacks worth considering. Roof voids must be ventilated in order to stop warm air condensing on cold surfaces.