Suspended Floor Insulation

Before you invest, here’s your go-to guide for everything you need to know about suspended floor insulation:

Why do I need suspended floor insulation?

Older buildings often have suspended floors made of concrete or, more commonly, timber – both of which are major culprits of heat loss. These gaps trap moisture and allow cool air in, causing timber rot and cold draughts that make you crank up the heating.

However, by adding insulation between the floor joists, you’re helping combat heat loss, as well as strengthening your floor’s foundations. That way, you get more heat for your money, and your floor is much more durable over time.

The benefits are clear: improved energy efficiency, lower heating bills, a sturdier floor, and a reduced carbon footprint for your business.

What material should be used?

Choosing the right insulation material is crucial. Here are some popular options:

• PIR thermal insulation board: PIR thermal insulation boards, such as Kingspan and Celotex, are popular choices known for their excellent thermal performance. Available in various thicknesses, like 50mm and 100mm, these boards fit perfectly between floor joists, providing durable and sturdy insulation. While their rigid nature ensures long-lasting effectiveness, it can make them a bit trickier to install compared to more flexible insulation materials. However, the superior thermal benefits they offer make the extra effort worthwhile.
• Mineral wool: Mineral wool is an excellent choice for packing between floor joists, effectively minimising heat loss. However, be mindful of wind wash, which occurs when airflow from the crawl space pushes the floor joist insulation out of place, creating bare spots that allow cold air to seep in. Proper installation and securing of mineral wool can help prevent this issue, ensuring optimal insulation performance.
• Natural insulation: Natural insulation, made from materials like hemp and sheep wool, is an eco-friendly and highly effective choice for those seeking a more sustainable option. These natural fibres offer excellent thermal performance and sound absorption qualities, making them ideal for maintaining a comfortable indoor environment.

How much does it cost to insulate a suspended floor?

Investing in high-performance thermal insulation for suspended floors can initially be more expensive, but the long-term financial benefits make it worthwhile. Costs vary based on the type and thickness of insulation you choose, as well as the size and condition of your floors. While more expensive options typically offer superior thermal efficiency and durability with a greater U-value, they also lead to reduced heating bills and improved energy savings over time.

Weigh the upfront costs against the potential savings and increased comfort over time, and you’ll find that a higher initial investment is often worth it for the long-term gains. Unsure? Speak to our specialists to make sure you’re investing in the right product for you.