Roof Insulation

Buy Roof Insulation

Insulating a roof can have a high impact on the thermal performance of a building. This is because it reduces heat transfer through the building envelope. Many people buy roof insulation to help stabilise internal temperature and improve energy efficiency, which can also reduce energy bills due to less demand for heating and cooling.

For homeowners, a better energy rating can help increase the value of a property. Some buyers may also argue that a well-insulated property is essential. A poorly insulated building may not meet modern building regulations and is not desirable. For commercial projects, roof insulation supports compliance. Over the lifetime of roof insulation, the energy savings often outweigh the cost to install it. This makes roof insulation an excellent investment for a property.

The benefits of installing roof insulation include:

• Reduction in energy usage and bills
• Helps a building be compliant with building regulations
• Improves comfort and temperature stability
• It can help increase property value

Different types of roof insulation

We sell a variety of roof insulation products on our website. This ranges from mineral wool, PIR boards and phenolic insulation. Loft roll is popular for quick installations, and it also offers acoustic benefits. PIR boards offer high thermal performance and are available in a range of thicknesses. Phenolic boards are good for when space is tight, but low thermal conductivity is essential.

Pitched roofs can be insulated between rafters or over rafters. Sometimes they are installed using a hybrid approach to balance depth and performance.

Choosing the correct type of roof insulation would depend on your project specifications. This is because all projects are different and therefore require a bespoke solution. We advise talking to a building professional or architect before you purchase your roof insulation. Speaking to a building professional can ensure that you are buying the correct insulation type for your project.

Roof Insulation Boards

Roof insulation boards are very popular because they have good thermal values and are easy to handle. PIR roof insulation boards are easy to cut and are great for both new build and refurbishment projects. Foil-faced boards such as Celotex multi-purpose PIR boards can help minimise thermal bridging when carefully taped and fitted. This is especially true around openings and junctions.

Some benefits of using roof insulation boards include:

• Great thermal performance at reduced thickness
• Easy to handle and cut
• Suitable for flat and pitched applications
• Available across a wide thickness range

Specific product information can be found on our product pages. Here you will be able to find information such as data sheets or technical attributes.

Loft Insulation Roll

Loft roll is commonly used in loft applications. This is because it is easy to install and has good insulating and acoustic properties. In addition to this, the loft roll is relatively low-cost and efficient. Loft roll is typically made from glass mineral wool or mineral fibre. It is designed to be paid between or over joists in a loft. This creates a thermal barrier that reduces the heat lost.

On our website, you can find loft rolls from popular brands such as Isover or Knauf.

In addition to this, loft insulation batts may also be used in loft applications. Materials such as mineral wool also boast fire protective properties. The non-combustible aspect makes loft roll insulation very popular.

Insulated Plasterboard

Insulated plasterboards combine plasterboard with PIR material to create a 2-in-1 product. This has all the benefits of plasterboard but also has the thermal properties of insulation.

Insulated plasterboards are often used below the rafters.

How does roof insulation work?

Roof insulation, such as loft roll, helps to create a thermal barrier to help a property maintain a comfortable internal temperature. Rigid roof insulation boards help block heat through conduction, convection and radiation. Closed-cell foam boards, such as XPS or PIR boards, are designed so that it is hard for heat to travel through them. This means only small amounts of energy can pass through. Foil facing insulation reflects radiant heat back towards the source. This helps to keep warmth indoors in the winter.

Roof insulation board applications

Below are common roof insulation board application types.

Flat Roof Insulation

• Warm Roof: This is above the deck and under the waterproof layer. PIR is commonly used in warm roof applications
• Inverted Roof: These are boards that are fitted on top of the membrane and act as a defence against the weather. XPS is commonly used here.

Pitched Roof Insulation

• Between Rafters: Panels can cut here to fit within the rafter spaces
• Over Rafters: Boards can be fitted across the top, which acts as a thermal blanket
• Below Rafters: Insulated plasterboard is commonly used for below rafters as these allow for decoration.

Cheap Roof Insulation

At Trade Insulations, we can offer cheap roof insulation. We can do this because we are a dedicated online supplier of insulation and believe in providing trade prices for everyone. You can rest assured that all of our products are brand new. Place an order online and get your roof insulation delivered directly to your project. It could not be easier. We are pioneering the way that roof insulation is bought online. Join the thousands of happy customers who use Trade Insulations and place your order today.

Roof Insulation FAQs

Below are some common roof insulation questions that we get from our customers. We have provided the answers to these frequently asked questions.

What thickness of roof insulation do I need?

The thickness required is heavily dependent on your bespoke project. We are unable to give exact advice for your project. Pitched roofs may feature mid-range board thicknesses, whilst flat roofs often require thicker layers. If you are unsure of the precise thickness needed for your insulation, then speak with a building professional. This will ensure you get the right materials for your project.

What is a vapour control layer and do I need it?

A vapour control layer, otherwise known as a VCL, is a membrane used to help manage the movement of moisture. When it comes to roof insulation, a VCL is almost always required. This is because moist indoor air can move into a roof space and build up, which could reduce thermal performance and risk timber decay. The good news is that foil-faced PIR often doubles up as VCL when the joints are taped.

Why are your roof insulation prices so cheap?

We can offer our best prices online due to the volume we sell. Our bulk discount is passed directly onto our customers, which means you don't need to be in the trade to get a trade discount. You can also access trade prices for no minimum quantity, which makes us the go-to place for roof insulation.