At RH Insulation, we know that keeping your home warm and energy-efficient is important, especially with Irish winters! One of the best ways to achieve this is with underfloor insulation.

We’ve put together answers to the questions we hear most from customers across Ireland, so you can decide if underfloor insulation is right for your home.

1. What is Underfloor Insulation?

Underfloor insulation is simply adding a layer of insulating material beneath your floors to stop heat escaping. In many Irish homes, especially those built before the 1970s, suspended timber floors are common.

These floors have a gap underneath, which can let cold air in and warmth out. By insulating this space, you keep your home cosier and reduce your heating bills.

2. How Does Underfloor Insulation Work?

For suspended timber floors, we fit insulation between the joists (the wooden beams under your floorboards). This insulation acts as a barrier, trapping heat inside and stopping draughts from coming up through the floor.

It’s a simple but highly effective way to make your home more comfortable.

3. Can All Floors Be Insulated?

Most Irish homes have either suspended timber floors or solid concrete floors. Suspended floors can be insulated.  Concrete floors would need to be removed to be insulated and a fresh concrete floor poured.

4. What Are the Benefits of Underfloor Insulation?

• Lower heating bills: Less heat escapes, so you save money every month.
• Warmer rooms: Say goodbye to cold floors and draughts.
• Reduced damp: Proper insulation helps keep moisture and mould at bay.
• Quieter home: Insulation can reduce noise from outside or below.
• Better for the environment: Lower energy use means a smaller carbon footprint.

Many of our customers notice a big difference straight away, especially in older homes.

5. How Is Underfloor Insulation Installed?

For suspended timber floors, our team will:

1. Fit high-quality insulation (like mineral wool) between the joists.
2. Add a vapour control layer to prevent moisture build-up.
3. Airtight membrane to stop drafts

6. Will It Make My Home Warmer?

Absolutely! Once the insulation is in place, you’ll notice your floors are much warmer, and the whole house feels cosier. One of our customers, Siobhan from Dublin, shared:
“After insulating our floors, the difference was instant. The kids can play on the floor without socks now, and our heating bills dropped too.”

7. Does Underfloor Insulation Stop Draughts?

Yes, it does. Many Irish homes have gaps between floorboards that let in cold air, especially in winter. The airtight membrane blocks these draughts, making your home feel snug and comfortable.

8. How Much Does It Cost?

The cost depends on your home’s size and floor type. For most Irish homes with suspended timber floors, prices range from €4,000 to €5,000.

9. Can I Install It Myself?

While DIY kits exist, we strongly recommend professional installation. Incorrect insulation can lead to damp or gaps, reducing its effectiveness.

At RH Insulation, our experienced team ensures your insulation is fitted safely and properly, giving you peace of mind.

10. How Do I Know If My Home Needs Underfloor Insulation?

You might need underfloor insulation if:

• Your floors feel cold even when the heating is on.
• You notice draughts coming up through the floorboards.
• Your energy bills are high.
• There’s a damp or musty smell under the house.

If your home has air bricks (small vents) near the ground outside, you probably have a suspended timber floor. Not sure? Just ask us for a free survey.

11. What Materials Do You Use?

We use only trusted, high-quality materials, including:

• Mineral wool:                      Great for suspended floors, fire-resistant and effective.
• Damp Proof Membrane:   Breathable to let moisture pass through and prevent any condensation build-up
• Air-tight Membrane:          Breathable to let moisture pass through and prevent any condensation build-up while still creating an air-tight seal.

12. Does Underfloor Insulation Need Maintenance?

No ongoing maintenance is needed. Once installed, your insulation should last for decades. Just keep air bricks clear to ensure good ventilation under your floor.

Customer Testimonial

“We live in a 1920s cottage in Dublin, and the floors were freezing in winter. RH Insulation checked our floors, explained everything clearly, and finished the job in a day. Now our home is warmer, and our energy bills are down by nearly 20%. Highly recommend!”
— Declan O’Sullivan, Dublin 12

Why Choose RH Insulation?

We’re an Irish company with over 20 years’ experience making homes warmer and more energy-efficient. Our team is fully qualified, friendly, and happy to answer any questions you have.

Ready to make your home warmer and more comfortable?

Contact RH Insulation today for a free, no-obligation survey. Your feet, and your wallet, will thank you!