Comprehensive guides to insulating your UK home. Cavity wall, loft, external wall, and underfloor insulation costs, savings, and DIY vs professional installation.
334 articles
Choosing the wrong roofline materials is a bit like putting a new roof on a rotting frame. The visible result looks perfectly fine for a year or two, then the hidden damage compounds quietly until you’re facing a bill that’s five times what it would have cost to get things right the first time. I’ve […]
Standing in a freezing hallway while warm air pours out every time the front door swings open is one of those small, grinding frustrations that adds pounds to your energy bill month after month. A neighbour of mine had a timber porch fitted onto the front of her 1930s semi last year, and within a […]
Roughly a third of the heat lost from an uninsulated UK home escapes through the walls. For properties with cavity walls, the most common wall construction found across mid-twentieth-century Britain, filling that gap with insulation is one of the single most impactful improvements a homeowner can make. Yet before any installer turns up with drilling […]
Millions of UK homes built before 1919 are haemorrhaging heat through their solid brick and stone walls every single day, adding hundreds of pounds to energy bills year after year. For owners of period properties, this heat loss is especially frustrating because the very design of their homes, built long before modern insulation was even […]
Understanding Draught Proofing and Why It Matters for Your Home Every winter, millions of UK homes quietly haemorrhage heat through gaps and cracks that their owners have never noticed, gaps around door frames, between floorboards, beneath skirting boards, and up open chimney flues. These unintentional openings cost real money every single month that the heating […]
Suspended timber floors are one of the most commonly overlooked sources of heat loss in older British homes, yet they are also one of the most straightforward to address. Millions of UK properties, particularly those built before 1930, including Victorian and Edwardian terraces, semi-detached houses, and end-of-terrace cottages, sit on suspended timber floors that were […]
Solid walls are one of the least forgiving features of an older UK home for energy efficiency. Unlike modern cavity walls, which trap a layer of still air between two leaves of brick, a solid wall is exactly that, a single, unbroken thickness of brick or stone, typically 225mm thick, with no gap and no […]
External wall insulation is one of the most impactful energy upgrades available to UK homeowners, yet it remains one of the least understood. For the millions of homes built before 1920 with solid brick or stone walls, it is often the only practical route to significantly improving wall thermal performance, and the cost, disruption, and […]
Loft insulation is one of the most cost-effective energy-saving upgrades available to UK homeowners, yet millions of properties across Britain still have insufficient depth installed. Whether your loft is completely bare, has ageing insulation from decades past, or simply falls short of today’s standards, understanding the correct thickness is the essential first step before spending […]
How Much Does Home Insulation Cost in the UK Home insulation is consistently rated as the most cost-effective energy efficiency measure by the Energy Saving Trust. Loft insulation costs as little as £300-£500 for a typical three-bedroom house and saves £200-£300 per year, delivering payback within two years. Insulation Costs and Savings by Type Insulation […]
Cavity wall insulation typically costs 500 to 1,500 pounds for a standard three-bedroom semi-detached house. The exact cost depends on the size of your home and accessibility. It can save around 150 to 250 pounds per year on heating bills, giving a payback of 3 to 6 years.
The recommended thickness for loft insulation in the UK is 270mm of mineral wool or equivalent. Many older homes have only 100mm or less. Topping up existing insulation to the recommended depth is one of the cheapest and most effective energy improvements you can make.
External wall insulation costs 8,000 to 15,000 pounds but can save 200 to 400 pounds per year on heating bills. It also improves comfort, reduces condensation risk, and can transform the appearance of your home. Grants through ECO4 or the Great British Insulation Scheme may cover part of the cost.
You can DIY loft insulation and basic draught proofing, which are straightforward projects. However, cavity wall insulation, external wall insulation, and underfloor insulation should be installed by certified professionals to ensure effectiveness, building regulations compliance, and warranty coverage.
Check your EPC certificate which will state whether cavity wall insulation is present. For a physical check, a professional can drill a small hole in the wall and use a borescope to inspect the cavity. Homes built after 1990 are likely to have insulation fitted during construction.
A lean-to conservatory is one of the most thermally challenging spaces in the British home, not because it is badly built, but because glass and polycarbonate simply cannot hold heat the way brick and insulation do. Owners who heat a poorly insulated lean-to generously in January are, in practical terms, warming the outdoors. Quick Answer […]
The average UK home loses heat through an uninsulated loft hatch, here is the figure from a 2023 DESNZ report An uninsulated loft hatch can be a significant weak point in your home’s thermal envelope. According to a 2023 report from the Department for Energy Security and Net Zero (DESNZ), an uninsulated loft hatch can […]
Caravan and motorhome owners often ask whether insulation upgrades are worthwhile for winter use. The answer depends on the type of vehicle, your budget, and how you plan to use it. Insulation can make a significant difference to comfort and heating costs. Quick Answer Caravan insulation costs £600-£2,500 in the UK for materials and DIY […]
Internal roof insulation costs £8–£35 per m², the final price depends on rafter depth and insulation type Insulating a pitched roof from inside is a common home improvement that can reduce heat loss through the roof by up to 25 percent. The cost to insulate a pitched roof from inside typically ranges from £8 to […]
Metal sheds lose heat six times faster than brick garages, here’s the data If you are planning to use a metal shed as a workshop, the first thing to understand is that the structure itself is a major source of heat loss. A standard single-skin metal sheet has a U-value of roughly 5.0 W/m²K, meaning […]
Insulation for a garden room year round A well-insulated garden room can cost from £1,500 to £4,000 to insulate properly, but the right choice between rigid foam and natural fibre boards can cut heating bills by up to 60% compared to an uninsulated structure. The two main options are rigid foam boards, which give the […]
