In building construction, roof pitch is a numerical measure of the steepness of a roof. There are typically two different ways to insulate a roof - a warm roof and a cold roof.
Warm pitched roofs
A warm roof will make the entire structure of the building warm in an attempt to avoid any cold bridging. It has a continuous insulation layer above the rafters and immediately below its weatherproof membrane. A warm roof construction has many benefits over a traditional ‘cold roof'. It is essentially a ‘breathable roof construction’, which allows moisture to escape, which in turn prevents dampness and any associated decay problems. A warm roof construction allows heat to be conserved within a property – without the need for a ventilation system.
A warm roof is recognised as being the most suited form of roofing to the UK climate, providing both a cost and thermally efficient solution.
Cold pitched roofs
A cold pitched roof is where the insulation is placed either between or between and under the rafters. 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 50 mm area of ventilation between the insulation and the top of the rafters.
Find out more about our pitched roof insulation:
Kooltherm K107 Pitched Roof Board - premium performance phenolic insulation.
Thermapitch TP10 - high performance PIR insulation.
