Price Guide

Finding the best cavity wall insulation

If your building was constructed post-1930s and the brickwork is presented on its long side, rather than an alternating long-short pattern, chances are it has cavity walls. Given all the boxes are ticked, cavity wall insulation is a great option for insulating your property. Here’s what you need to know before you buy:

Choosing the right insulation material

The best cavity wall insulation for you will depend on a few factors. This includes choosing the right material and form, which you’ll need to consider your climate conditions and therefore your thermal performance needs, as well as cavity wall insulation cost considerations. With lots of options, it’s best to chat to a specialist to find the best fit:

  • Mineral wool fibre: Can be made from stone, slag, and molten glass. It’s cost-effective and easy to install.
  • Sheep’s Wool: An eco-friendly option with properties similar to mineral wool.
  • Rigid Insulation boards (PIR): Excellent for heat retention and moisture resistance.
    Polystyrene beads: Lightweight, durable, and budget-friendly.

Types of external cavity wall insulation

Cavity wall insulation slabs are ideal for flat surfaces requiring coverage, offering thermal and acoustic insulation, water repellency, and fire resistance.

Rolls are perfect for uneven surfaces or around obstacles like pipes, providing effective heat insulation and sound absorption. Can require additional fixtures like insulation supports to prevent movement, so keep that in mind.

Benefits of insulating your cavity walls

There’s numerous advantages to ensuring your property is properly insulated. The most common reason why people wouldn’t get their cavity walls insulated is because of the expense. However, in the long-run, the investment is worthwhile, and should essentially pay for itself. Here’s our favourite benefits:

  • Energy savings: Reduces heat loss, meaning your property is more comfortable – lowering the amount of money spent on energy bills.
  • Environmental impact: Less heating needed means a smaller carbon footprint – great news for your business and our planet!
  • Mould prevention: Limits moisture passing through walls, reducing condensation and mould growth.

Ready to insulate your commercial space? Speak to our specialists today.

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Frequently Asked Questions

Does cavity wall insulation cause damp?

Many people believe that cavities should not be filled as it could lead to damp bridging. However, this is a very small possibility. Where water penetration does occur, this is usually due to defects in the construction of the property and not due to the faulty or inappropriate installation of cavity wall insulation.

How much does cavity wall insulation cost?

Typical costs vary depending on the size of your building, and of course, the type of insulation material you choose. We have a wide range of materials, ranging from premium products to more budget-friendly options.

How long does cavity wall insulation last?

Cavity wall insulation generally lasts about 25 years. However, its longevity can be influenced by the quality of the materials and the standard of installation.

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