Loft insulation is made in a wide range of materials. Price, effectiveness, application and green credentials are all factors to be considered when choosing the best loft insulation material for your project.

The question ‘What is loft insulation made of?’ usually refers to any insulation used in the roof area of a property (whether converted or otherwise). This can include the floor area of a loft as well as in the roof itself.

What is loft insulation made of?

Materials include:

How should you choose the right material for your loft insulation?

From traditional glass wool to sustainable, renewable wood fibre insulation, each material and makeup of loft insulation has different benefits.

Loft roll is the most common domestic form of loft insulation. Loft roll is considered a useful domestic loft insulation product because it’s easy to install. Simply by rolling out the insulation across the floor in your loft, you’ve also insulated the ceilings! It’s perfect for exposed joists and other accessible places due to this easy install (however it’s not typically the chosen insulation if there are obstructions to insulate around).

Glass fibre insulation is one of the most widely used materials for loft roll insulation. The biggest advantage associated with glass fibre loft roll insulation is the upfront costs, which are low compared with other materials. People on a tight budget will find this important.

A vapour barrier (preventing the buildup of moisture) should be used, however, which needs to be costed in. Glass fibre insulation is easy to install, reduces sound, is non-combustible (note: the insulation covering may not be fireproof) and can contain recycled materials. An obvious disadvantage, however, is that this material may be harmful if inhaled or comes into contact with skin. Should the product ever become wet (due to a leaky roof or condensation), it loses its insulation qualities and is then ineffective. Glass fibre insulation generally requires more space to fit the product and will not be fitted easily into small spaces or gaps.

There are advantages and disadvantages to each of the available materials for loft insulation. If you are unsure which type of insulation you need or that will suit your application, contact our helpline on 01752 692 206 for more information, email on or use our live chat option.

Was this guide useful?

Need more Help & Advice? Speak to our Super team on 01752 692 206

Can’t find the Help & Advice you need? Speak to our Super team today on 01752 692 206