Insulation

Here, we explain the different kinds of insulation available, how to pick the best type for your home and what grants there are to help with the cost.

Cavity wall insulation
by Sarah Ingrams
Find out how cavity wall insulation works, what to watch out for and how much money you could save on your heating bills by insulating your cavity walls.
How to buy loft insulation
by Sarah Ingrams
If you install loft insulation you could cut your energy bills by £240 a year. We explain the different types of loft insulation and how to choose the best.
Floor insulation
by Ellie Simmonds
Expert floor insulation advice from Which? to keep your home cosy and stop draughts. We'll help you pick the best floor insulation to cut your energy bills.

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Draught proofing
Expert tips from Which? on draught proofing your home to save on heating bills. From cheap and easy ways to cut draughts to draught proof sash windows.
Roof insulation
Expert advice on roof insulation, including how to insulate a flat or pitched roof, how much it costs and how much cash you can save by getting roof insulation.
Solid wall insulation
The solid wall insulation guide - including how much internal and external wall insulation will cost and save on your energy bills, plus advice on how to pay.
Spray foam insulation
Is spray foam insulation right for your home? Find out how spray foam insulation works, how much it costs and if spray foam insulation can cut your energy bills

Insulation

Cavity wall insulation

How to buy loft insulation

Floor insulation

Put us to the test

Draught proofing

Roof insulation

Solid wall insulation

Spray foam insulation