Roof Void Insulation

To provide adequate ventilation and to avoid condensation in roof voids pitched roofs that have insulation at ceiling level should be ventilated to the outside air.

Roof void insulation.

Single ply roof insulation. Inaccessible roof void insulation. Where the eaves has a soffit installing soffit vents can increase ventilation. If you are making your attic space into livable space you may need to use spray foam.

This gap must be ventilated at the top i e. Insulating your loft attic or flat roof is a simple and effective way to reduce heat loss and reduce your heating bills. This is bad for the environment and for your wallet as you end up spending a lot more on your electric bills. A quarter of heat is lost through the roof in an uninsulated home.

It is important that air is allowed to circulate between the roof covering and the insulation to avoid condensation a gap of at least 50mm 2 inch must be left between the insulation and the inside of the roof covering. Fabrications with 3mm 10mm openings are acceptable. Rockwool multifix is a mineral fiberglass faced stone wool product that can be installed under many single ply membranes. A roof without good insulation is a great contributor to energy loss.

For inaccessible roof voids spray foam insulation will normally need to be injected into the space. The material is blown onto the surface to create an even layer that helps to eliminate cold and hot spots. Ventilation openings should prevent the entry of birds etc. Proper insulation can significantly reduce your energy consumption heat in the winter ac in the summer and reduce your energy costs by hundreds of dollars a year.

To avoid condensation problems this space must be well ventilated so vents may need to be installed in the roof and at the eaves and ridge. If roof sheathing is coated with spray foam insulation it can cause the shingle temperature to rise and cause it to fade in color and have a shorter lifespan. Whatever form the insulation takes it is vital that there is an air gap of at least 5cm between the face of the insulation and the roof covering. Single ply roof systems can provide an easy to install seamless roof assembly.

For an accessible roof void spray foam insulation will often be applied via a spray. Loft insulation is effective for at least 40 years and it should pay for itself many times over.