Loft insulation

Loft insulation is one of the most effective and affordable ways to keep your house comfortable, save energy and reduce heating costs. 

Many homes already have some loft insulation but topping it up to around 270mm can significantly improve its performance. In most cases, the existing insulation can simply be topped up. This is provided it’s in good condition and has not been affected by damp, pests, or water damage. Don't forget to insulate the loft hatch too, as this can be a significant source of heat loss.

When installing loft insulation, it is important to maintain adequate ventilation within the roof space. A small gap should be left at the eaves to allow air to circulate and help prevent condensation and moisture build-up. In some cases, additional vents or ventilation trays may be needed to ensure sufficient airflow.

It’s recommended that you get a TrustMark registered professional to lay the insulation. But if you choose to insulate the loft yourself, it’s important that you wear appropriate personal protective equipment (PPE). This includes gloves, eye protection, a mask, and long-sleeved clothing as insulation fibres can irritate the skin, eyes and lungs.

To ensure the insulation performs effectively, avoid compressing it by storing boxes or other items directly on top. If you need to use your loft for storage, consider installing raised loft boarding, which allows items to be stored above the insulation without reducing its effectiveness.

Flat roof insulation

If your home, extension or conservatory has a flat roof, there are still opportunities to improve its insulation and reduce heat loss. If your flat roof is due to be replaced or repaired, this can be a good opportunity to improve its insulation at the same time.

Flat roof insulation can be installed above the roof structure, known as a warm roof, or below the roof structure, known as a cold roof.

In many cases, a warm roof is the most effective and preferred option because it is often more energy efficient and reduces the risk of condensation forming within the roof structure. However, the most suitable approach will depend on the design of your home and the condition of the existing roof.

As flat roof insulation can be complex, it is recommended that you use a qualified, TrustMark registered installer who can advise on the most suitable solution for your home.

It is important that flat roof insulation is installed correctly and that adequate ventilation or moisture control measures are in place. Poorly designed or installed insulation can lead to condensation, damp and damage to the roof structure.

There are grants and projects ongoing across the county to help residents make significant energy-efficiency improvements to their properties. This includes grants to fully-fund such improvements for those in fuel poverty or on low income. If you would like more information regarding these projects and grants contact us via email at: retrofit@oxfordshire.gov.uk or register your interest via our online form.