Underfloor Insulation That Keeps the Cold Out
Don’t endure another cold winter at home. With KDS Insulation, your period property can enjoy modern levels of underfloor insulation and improved comfort.
Our high-performance system is installed beneath draughty, timber suspended floors with minimal disruption to your home. The KDS Insulation solution is foam-free, safe, and cost-effective.
Enquire About Floor Insulation
KDS Insulation Keeps the Cold Below — and Your Home Warm
We insulate your floor by securely fitting insulation beneath the floorboards, dramatically reducing heat loss and completely stopping cold draughts from entering the room. First, a breathable membrane is installed below the floor joists at the correct level to support the insulation.
We then carefully fill the spaces between the joists with high-performance mineral fibre insulation, tightly packed into every corner to ensure consistent coverage.
Crucially, we maintain the ventilation air gap beneath the insulation, as shown below. This allows fresh air to circulate below the floor, keeping the ground moisture isolated from the room and preserving the health of the timber structure—just as originally intended.
Certified Installers
Fast Turnaround
Satisfaction Gurantee
Why KDS Underfloor Insulation
Installation with Minimal Disruption
By lifting only a small number of floorboards, we’re often able to insulate an entire floor in just one day. Once complete, we restore the room to its original condition—without the need to remove skirting boards. Our fully trained installation teams are professional, courteous, and respectful of your home. Customers frequently comment on how easy we are to have around, and we always leave your space clean and tidy.
Long-Term Comfort and Ongoing Savings
Underfloor insulation is a lasting investment in your home. Beyond the immediate improvement in comfort, a well-insulated property requires less energy to stay warm—meaning you’ll see the benefits reflected in lower heating bills month after month. Take the first step towards a warmer, more efficient home by contacting our expert team today.
Improves Your EPC Rating
Improving your Energy Performance Certificate (EPC) rating can help reduce energy bills and increase the value of your property. For landlords: forthcoming regulations are expected to require all rental properties to achieve an EPC rating of C or above, making energy efficiency improvements increasingly important. Underfloor insulation is often one of the most cost-effective upgrades available, with the potential to save hundreds of pounds each year compared to other measures.
High Performance Insulation
Our underfloor insulation meets UK Building Regulations for thermal performance. High- quality mineral fibre insulation is packed densely to fill the spaces between joists, reducing heat loss and eliminating cold draughts. Crucially, we preserve the necessary ventilation beneath the insulation, ensuring the underfloor area continues to function as intended.
Frequently Asked Questions
How long does the installation take?
Most rooms can be insulated in just one day, with minimal disruption. Larger or more complex spaces may take longer, but we’ll confirm timelines during your quote.
Will I need to move furniture or clear the room?
We’ll advise based on your layout, but in many cases only partial clearance is needed. Our team works around your space with care and efficiency.
Can you insulate upstairs floors or extensions?
Yes — we can insulate any suspended timber floor, including upper levels and newer builds with underfloor voids.
Is your insulation suitable for listed buildings?
Absolutely. Our system is non-invasive and breathable, making it ideal for heritage properties. We preserve ventilation and avoid damaging original features.
What materials do you use?
We use high-performance mineral fibre or cellulose insulation — safe, eco-friendly, and compliant with UK Building Regulations. No spray foam, no harmful chemicals.
Will this help with noise reduction?
Yes — many customers report noticeable improvements in sound insulation, especially between floors.
Do I need planning permission?
No — underfloor insulation is considered a non-structural upgrade and doesn’t require planning approval.
Instant Comfort — and Double the Savings
Why Underfloor Insulation Matters
Cold Floors Waste Energy
Uninsulated timber floors allow heat to escape straight into the underfloor void. Even with carpets, warmth is lost quickly — making rooms harder and more expensive to heat.
Draughts Enter Through Floorboard Gaps
Gaps between floorboards act like a permanent open window. Cold air rises into your living space, creating discomfort and uneven temperatures throughout the room.
Moisture Needs Controlled Ventilation
Older homes rely on underfloor airflow to prevent damp. Our system preserves this essential ventilation while adding the insulation your home has always lacked.
