Insulation & Heat Loss UK: Draughts, Windows and Warmer Rooms

Find where the room is losing heat

How to Stop Heat Loss in a Room UK

Work through windows, doors, floors, walls and heating layout before buying products. This is the best starting point when you are not yet sure whether the problem is air leakage, cold surfaces or wider insulation.

Stop unwanted draughts around doors and windows

How to Draught-Proof Doors and Windows UK

Identify unwanted gaps without blocking trickle vents or other intentional ventilation, then choose foam, brush, rubber profile or replacement gasket according to the gap.

Best Draught Excluders UK

Compare current brush seals, rubber profiles, foam and uPVC replacement gaskets by use case rather than assuming one product suits every gap.

Use thermal curtains around cold windows

Do Thermal Curtains Work in the UK?

Understand when lined curtains improve comfort, how radiator position changes the result and why fixed annual savings claims should be treated cautiously.

Best Thermal Curtains UK 2026

Compare thermal and blackout-lined curtains by fit, heading type, size range and window use rather than marketing language alone.

Add temporary window insulation where appropriate

Does Window Insulation Film Work in the UK?

Learn the difference between shrink-film secondary glazing and low-E film, when temporary film can help and why it should not replace draught repairs or ventilation.

Best Window Insulation Film UK 2026

Compare three well-documented DIY secondary-glazing kits from tesa, Exitex and Stormguard by coverage, fitting method and UK availability.

Is Secondary Glazing Worth It in the UK?

Compare magnetic, lift-out, hinged and sliding secondary glazing, including thermal performance, condensation risk, older-building use and how rigid systems differ from seasonal film.

Cold floors, rugs and floor insulation

How to Stop Cold Floors in the UK

Work out whether the problem is draughts through suspended floorboards, a genuinely uninsulated ground floor or simply a cold surface underfoot. The guide covers rugs, flexible gap sealing, suspended timber insulation, solid floors, ventilation and realistic savings.

Best Carpet Underlay for Cold Floors UK 2026

Compare current high-tog underlays for conventional heating and low-tog options designed for underfloor heating, with clear guidance on thermal resistance, thickness and durability.

Loft insulation

How Much Loft Insulation Do You Need in the UK?

Understand what the common 270mm mineral-wool reference means, how to measure existing insulation, when a top-up is worthwhile and why ventilation, damp and boarded storage need to be considered before adding more material.

Where should you start?

• You can feel moving cold air: start with the draught-proofing guide.
• The glass feels cold but there is no obvious air leak: compare thermal curtains and window film.
• You rent: prioritise reversible fixes such as curtains, removable seals and seasonal film, subject to your tenancy terms.
• The whole room stays cold despite sealing windows and doors: use the heat-loss guide and consider whether walls, roof, floor or heating distribution are the real problem.
• Condensation is persistent: do not seal the room more tightly without checking ventilation; use the Damp, Drying & Dehumidifiers hub.