Sustainability is an increasingly important issue. By making your home energy-efficient, you are helping nature and also saving on your energy costs. One of the most efficient and cheapest sustainability solutions is insulating your roof. In this article, you will read all about the sloping roof insulation costs.
Sloping roof insulation costs
Insulating your sloping roof costs an average of £1,000 to £5,500. The cost of insulating a pitched roof depends on a number of factors and choices you make. Among others, the size of the roof, the construction of your roof and the maintenance condition of the house affect the insulation prices. Check here the average sloping roof insulation costs for a 60m² roof.
| Type of roof | Average costs including installation and VAT | Average savings m³ gas | Annual energy savings | Return time |
|---|---|---|---|---|
| Inside (cold roof method) | £1.000 – £3,000 | 500 m³ | £300 | 5 years |
| Outside (warm roof method) | £2,500 – £5.500 | 900 m³ | £ 500 | 7 years |
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Price structure sloped roof insulation
What choices affect the sloping roof insulation cost?
There are a number of choices that affect the sloping roof insulation cost. Check out the choices that affect the price here.
Choice 1: Different types of insulation material
The type of insulation material partly determines the cost of sloping roof insulation. There are many different types of insulation material. Comparing insulation materials often saves money. Check out the average prices and pros and cons for each type of insulation material below.
| Type of insulation | Costs | Advantages | |
|---|---|---|---|
| Glaswool | £8 per m² | Erg cheap, easy to use and good insulation value | Can be irritating during installation and not suitable for very narrow cavity walls |
| EPS (Tempex) | £ 10 per m² | Light material and recyclable | Tough to work with, poor at sealing corners and seams |
| Stone wool | £ 8 per m² | Good sound absorber, does not get mouldy and is recyclable | Not suitable for narrow cavity walls |
| Pir | £ 12 per m² | Light material ideal for damp spaces | Is not environmentally friendly due to harmful chemicals in production |
| Pur | £ 25 per m² | Seals seams and gaps perfectly | High price |
Choice 2: Inside or outside
When insulating a pitched roof, you have the option of having the inside or outside of your roof insulated. For insulation on the inside, the specialist will place insulation material between the roof boarding and the finish, such as plasterboard. For insulation on the outside, the insulation material is placed directly under the roof tiles. This has the advantage that much less heat escapes through the roof structure as well. See below the average sloping roof insulation costs per type of house.
| Type of house | Average price roof insulation inside (cold roof method) | Average price roof insulation outside (warm roof method) |
|---|---|---|
| Tween house (50 m²) | £ 1.000 – £2,500 | £2,000 – £3,000 |
| Corner house (60 m²) | £1.200 – £ 3,000 | £ 2,400 – £ 3,600 |
| Detached house (75 m²) | £ 1,500 – £ 3,750 | £ 3,000 – £ 4,500 |
Choice 3: Use vapour barrier foil
Many types of insulation material are sensitive to moisture. When a material such as glass or rock wool comes into contact with water, the insulation value decreases. It is therefore wise to use vapour barrier foil. This foil prevents moisture from getting onto the insulation material. Vapour barrier foil costs an average of £1 to £2 per m².
Choice 4: Additional options
In addition to insulating your sloping roof, there are a number of additional options to make your home even more sustainable. Check out additional options below that will affect your pitched roof insulation costs.
Go for insulated roof tiles
What many people don’t know is that there are special roof tiles with insulation available. Are your roof tiles due for replacement soon? Then look into insulated roof tiles. These special models ensure that even less heat escapes from the house. Insulated roof tiles cost just a little more than their non-insulated counterparts. For example, insulated plastic tiles cost £18 per sq m, while you pay £12 per sq m for non-insulated tiles.
Insulate your attic floor
Insulating your attic floor will help keep the heat inside your home even better. In addition, less heat will escape upstairs from other floors. Check out the average costs for insulating your attic floor below.
| Type of insulation | Average costs | Average savings m³ gas | Average savings per year | Average payback time |
|---|---|---|---|---|
| Attic floor | £1.000 – £ 2,000 | 500 m³ | £ 400 | 4 years |
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