What is the difference between a warm pitched roof and a cold pitched roof?

A warm roof and a cold roof are two different ways of insulating a roof. A warm roof building will make the entire structure of the building warm in an attempt to avoid any cold bridging. It is where the insulation is located ‘above’ or ‘above and between’ timber rafters.  Cold bridging refers to an element of the building (the roof in this case), which is allowing heat transfer and loss of energy. A cold pitched roof is where the insulation is placed either ‘between’ or ‘between and under’ the rafters or at ceiling joist level. This type of insulation system can be ventilated or not ventilated. However, if the roof is not ventilated then it will require a breathable membrane between the insulation and structure. If you live in an old building you may find that your roofing underlay is sarking felt, if so, you will need to allow for a 50mm area of ventilation between the insulation and the top of the rafters.

To keep up to date with all our latest blog posts you can follow the blog by clicking this RSS Feed link or by following us on Twitter @KingspanIns_UK or on Linkedin.

Share this blog post with your friends and colleagues by clicking on the social media icons below.

Print this page

Kingspan Insulation is a market leading manufacturer of optimum, premium and high performance rigid insulation products and insulated systems for building fabric and building services applications.