Roof Void Insulation

Single ply roof insulation.

Roof void insulation.

For inaccessible roof voids spray foam insulation will normally need to be injected into the space. 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. 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. 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. At the ridge and also at the bottom either through vents at the eaves or. 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. The material is blown onto the surface to create an even layer that helps to eliminate cold and hot spots.

Where the eaves has a soffit installing soffit vents can increase ventilation. Loft insulation is effective for at least 40 years and it should pay for itself many times over. A roof void needs ventilation equivalent to the area of a continuous 10mm 3 8 in slot at eaves level. For an accessible roof void spray foam insulation will often be applied via a spray.

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. Ventilation openings should prevent the entry of birds etc. Fabrications with 3mm 10mm openings are acceptable. This gap must be ventilated at the top i e.

The materials used to insulate under the roof include batts of mineral or glass wool insulation held in place by battens of wood attached to and across the rafters alternatively polystyrene. This is bad for the environment and for your wallet as you end up spending a lot more on your electric bills. Insulating your loft attic or flat roof is a simple and effective way to reduce heat loss and reduce your heating bills. 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.

If you are making your attic space into livable space you may need to use spray foam. 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.