roof insulation

Roof Insulation

If left un-insulated, around 25% of household heat can escape through the roof, draining the warmth from your home. Therefore, insulating your roof will improve the heat retention of your property, enhancing comfort and reducing energy costs by up to 20%, as well as saving up to an average of 920kg of carbon dioxide from entering our atmosphere every year. It is also important to glaze roof windows or skylights to maximise the capabilities of your roof insulation.

 

Roof insulation lasts for over 40 years and will cover its initial cost multiple times over in energy bill savings.

 

Insulating methods
There are two main methods of loft insulation; warm or cold.

 

Cold Loft Insulation

Standard cold loft installation involves fitting mineral wool in-between the existing joists within your loft flooring. An additional layer of insulant is then installed over the joists to add more depth to the insulating layer. This is a low cost and straightforward approach to loft insulation but leaves your space vulnerable to fluctuations in temperature throughout the year. It is therefore mostly undertaken if the space is merely being used for storage purposes.

 

Warm Loft Insulation

During a warm loft installation, the installer will secure or spray insulant within the rafters of your roof, using them as an element in establishing the warm fabric of your home. With this approach, heat loss through the underside of the roof is prevented, ensuring that warmth is maintained within your loft space. Although this method is often more costly, it will keep your roof space consistently warmer than the cold loft insulation method.

Room-in roof
Roof insulation is important if your house was developed with a room within its loft. Here, it is necessary to insulate all areas of the ceiling and walls to retain warmth and avoid draughts.

 

Vertical and sloping surfaces can be insulated through the warm loft method, enforced with a strong material that won’t warp, such as plasterboard.

 

Flat roofs
If your roof, or any section of your roof, is flat, then insulation is crucial in preventing loss of warmth from the heated room below. It is not necessary to insulate a roof above an unheated room, such as a garage.

 

Flat roofs are usually insulated from above, involving layers of rigid insulation board and weatherproof coating that are installed over the roof surface. This is because insulating a flat roof from inside your home can lead to issues with condensation if not installed appropriately. Insulating a flat roof usually requires some disruptive replacements and is therefore often installed alongside other building work.

roof-in-roof




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