Warm roofs are type of roof installation which places a layer of insulation above the roof deck, keeping the deck ‘warm’, and underneath the weatherproof membrane, as opposed to a cold roof which places the insulation between or under the roof deck.
The main benefit of a warm roof is that it enables the property to ‘breathe’, allowing moisture to escape and ultimately preventing damp setting in. Therefore, a properly installed warm roof system should allow heat to be conserved within a property without the need for a ventilation system.
Without a ventilation system there is no opportunity for moisture to come into contact with a cold surface and condense. This makes warm roofs ideal for flat roofs above kitchens, bathrooms and rooms with high levels of humidity, as these rooms are prone to mould growth in properties with cold roof designs.
However, cold roofs also have advantages. In countries such as the UK which often suffer from heavy bouts of snowfall, cold roofs help to prevent ice damming.
Ice damming occurs when the heat in the property rises and warms the snow settled on the roof. The water from the melted snow runs down to the eave, which hasn’t been heated, and then freezes again. As more snow melts, the dam prevents the water running off and grows in size, causing the water to back up and create leaks in the roof.
If you’d like to learn more about warm and cold roofs or find out which one is best suited for your project, get in touch via the web form or call our offices on 01924 270 2822.