Best Loft & Wall Insulation UK (2026) — Page 2

Pros

• Polyester fibre construction is itch-free to handle, unlike mineral wool
• Non-toxic and safe to install without a full respirator and gloves
• Suits lofts, walls, floors and van conversions from one roll

Cons

• Lower density than mineral wool, so needs care not to compress it when boarding over

Pros

• Small 0.6m x 5m roll suits patching, sheds and smaller wall sections
• Reflective foil layer doubles as a radiant barrier and vapour barrier
• Thousands of verified reviews back up its reliability

Cons

• Small roll size means several are needed to cover a full loft

Pros

• Self-adhesive backing speeds up fitting to roofs and walls
• Cotton wadding layer adds sound deadening as well as thermal insulation
• 10m² coverage per roll suits a full shed or small loft section

Cons

• Self-adhesive layer needs a clean, dry surface to bond properly

Pros

• Thinner 100mm option suits a top-up layer over existing insulation
• Non-combustible glass mineral wool with ECOSE bio-based binder
• Same trusted Knauf roll used for both loft and floor lagging

Cons

• On its own, 100mm falls short of current Building Regs recommendations

Pros

• Single-roll pack suits smaller top-up or repair jobs without over-ordering
• Mineral wool construction gives solid thermal and acoustic performance
• Works for both roof lagging and suspended floor insulation

Cons

• Higher cost per roll than buying in the larger multi-roll packs

Pros

• 175mm height lifts boarding clear of insulation to keep it uncompressed
• Plastic construction is lightweight and easy to carry up into a loft
• 32-pack suits a decent sized loft boarding project in one order

Cons

• Loft boards need to be bought separately to complete the raised floor