Loft Insulation

Stay legal. Cut costs. Keep the heat in.

Since April 2018 it’s been illegal to let a property in England and Wales with an inadequate energy rating. That requirement now applies to all existing tenancies, so if your EPC is an F or G you risk penalties and may be prevented from renting unless you improve efficiency. One of the quickest, most cost-effective upgrades is loft insulation.

Why Loft Insulation Matters

Up to a quarter of a home’s heat can escape through the roof, so you’re literally heating the sky. Proper insulation cuts bills (often more than £240 a year), pays back quickly, and keeps working for years. It also lowers your carbon footprint, improves tenant comfort, and can lift property value.

Installing 270 mm (around 11 inches) of quality loft insulation can transform a property from non-compliant to efficient, dramatically reducing heat loss and future-proofing your investment.

Our Insulation Options

Knauf Loft Roll 44

A glass mineral wool roll ideal for cold lofts with pitched roofs. Thermal conductivity is 0.044 W/mK, making it a strong, practical choice for newer builds (typically late 1980s onwards).

Knauf Loft Roll 40

A higher-performance glass mineral wool with 0.040 W/mK thermal conductivity. It’s Euroclass A1 (non-combustible) and made with ECOSE® Technology. A great fit for older properties needing extra performance.

Sheep’s Wool Insulation (Thermafleece CosyWool)

Made from approximately 75% natural wool and 25% recycled polyester. It’s safe to handle, breathable, and offers excellent thermal and acoustic performance. Thermal conductivity is 0.039 W/mK.

SupaSoft Insulation

Manufactured from recycled plastic bottles. It’s soft, non-itch, chemical-free, and easy to install, with a stated thermal conductivity of 0.16 W/mK for projects prioritising recycled content.

Protect Your Investment Now

Upgrading your loft insulation is the fastest way to meet MEES requirements, avoid fines, improve tenant comfort, and safeguard rental income against tightening standards.

Call Just Lofts & Build for a free survey and no-nonsense quote. We’ll make sure your property passes—and stays ahead of—the rules.

Contact Us

Just Lofts & Build
Office: 029 2252 3483
Mobile: 07514 795 000
Proudly serving Cardiff and surrounding areas within a 50-mile radius.