Collection: Loft Insulation

At Insulation4less, we sell a variety of loft insulation products to help keep your home warm and energy efficient. Our selection includes both rolls and batts of insulation, as well as insulation board, plasterboard and more. We also carry a variety of accessories, such as loft hatches and ladders, to make it easy to install your insulation. Whether you're looking to insulate a new home or improve the energy efficiency of your existing home, we have the products and expertise to help. Give us a call today to learn more about our loft insulation products. Thank you for shopping at Insulation4less!

Loft insulation will stop a quarter of the heat escaping through the roof and there are several types available, depending on your needs. Insulating your attic also saves an average of £600 over five years and can increase the value of your home with better ratings on an Energy Performance Certificate. We stock top loft insulation brands like Celotex, Knauf, Rockwool and Isover so you’ll get a high-quality product when you buy through our website.

When starting loft insulation, start with the right products for your project. Sheet insulation boards are made from natural or synthetic materials and are fantastic for insulating your roof’s underside. Blanket insulation (loft roll insulation) is the cheapest and most common loft insulation, as it is easy to fit between joists and comes in glass, mineral fiber, rolls of rock, and foil-backed felt. Blown-fiber insulation requires a qualified technician, as it involves various loose materials being blown in between the joists. Loose-fill insulation tops up existing insulation, using lightweight materials like mineral wool, cellulose fiber, cork granules or recycled newspapers.

To turn your loft into a warm living space, you’ll need to use roof insulation in addition to insulation in the joists so that some heat will enter the room to regulate the temperature but you won’t lose it through the roof. If you are trying to create a colder atmosphere or are on a tighter budget, you would need to insulate the floor joists but not the roof. Just remember to lag any pipes so they do not become damaged in the cold.

For more information about our products, call our expert team on 020 3582 6399 or talk to us via Live Chat .

Read Our Guide.
Knauf Glass Mineral Insulation Loft Roll 44 Combi-Cut (13.89m2 roll)
Knauf Earthwool Glass Mineral Insulation Loft Roll 44 Combi-Cut (13.89m2 roll) Loft Insulation
Vendor
Knauf
Regular price
£24.00 £28.80
Sale price
£24.00 £28.80
Regular price
£0.00
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Knauf 150mm Loft Roll 44 Combi-Cut (9.18m2 roll)
Knauf Earthwool 150mm Loft Roll 44 Combi-Cut (9.18m2 roll) Loft Insulation
Vendor
Knauf
Regular price
£23.54 £28.25
Sale price
£23.54 £28.25
Regular price
£0.00
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per 
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Knauf 170mm Loft Roll 44 Combi-Cut (8.01m2 roll)
Knauf Earthwool 170mm Loft Roll 44 Combi-Cut (8.01m2 roll) Loft Insulation
Vendor
Knauf
Regular price
£27.46 £32.95
Sale price
£27.46 £32.95
Regular price
£0.00
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per 
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Knauf 200mm Loft Roll 44 Combi-Cut (6.84m2 roll)
Knauf Earthwool 200mm Loft Roll 44 Combi-Cut (5.93m2 roll) Loft Insulation
Vendor
Knauf
Regular price
£24.20 £29.04
Sale price
£24.20 £29.04
Regular price
£0.00
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per 
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Knauf Loft Roll 44 Combi-Cut - All Sizes
Knauf Earthwool Loft Roll 44 Combi-Cut - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £23.54 £28.25
Sale price
from £23.54 £28.25
Regular price
£0.00
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per 
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Isover Spacesaver Combi-Cut - All Sizes
Isover Spacesaver Combi-Cut - All Sizes Loft Insulation
Vendor
Isover
Regular price
from £27.82 £33.38
Sale price
from £27.82 £33.38
Regular price
£0.00
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per 
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Rockwool Roll - 150mm x 1200mm x 3650mm
Rockwool Roll - All Sizes Loft Insulation
Vendor
Rockwool
Regular price
£66.35 £79.62
Sale price
£66.35 £79.62
Regular price
£0.00
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per 
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Rockwool Twinroll 100mm Mineral Wool Insulation (6.60m2)
Rockwool Twinroll 100mm Mineral Wool Insulation (6.60m2) Loft Insulation
Vendor
Rockwool
Regular price
£57.64 £69.17
Sale price
£57.64 £69.17
Regular price
£0.00
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per 
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100% Sheepwool Insulation Premium Roll (All Sizes)
100% Sheepwool Insulation Premium Roll (All Sizes) Loft Insulation
Vendor
Sheepwool
Regular price
from £83.57 £100.28
Sale price
from £83.57 £100.28
Regular price
£111.42
Unit price
per 
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100% Sheepwool Insulation Comfort Roll (All Sizes)
100% Sheepwool Insulation Comfort Roll (All Sizes) Floor Insulation
Vendor
Sheepwool
Regular price
from £50.94 £61.13
Sale price
from £50.94 £61.13
Regular price
£67.92
Unit price
per 
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100% Sheepwool Insulation Optimal Roll (All Sizes)
100% Sheepwool Insulation Optimal Roll (All Sizes) Loft Insulation
Vendor
Sheepwool
Regular price
from £72.18 £86.62
Sale price
from £72.18 £86.62
Regular price
£96.24
Unit price
per 
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Superglass Multiroll 44 - All Sizes
Superglass Multiroll 44 - All Sizes Loft Insulation
Vendor
Superglass
Regular price
from £30.02 £36.02
Sale price
from £30.02 £36.02
Regular price
£0.00
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per 
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Knauf Acoustic Roll - All Sizes
Knauf Earthwool Acoustic Roll - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £36.00 £43.20
Sale price
from £36.00 £43.20
Regular price
£0.00
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per 
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Rockwool RWA45 (All Sizes)
Rockwool RWA45 (All Sizes) Floor Insulation
Vendor
Rockwool
Regular price
from £20.17 £24.20
Sale price
from £20.17 £24.20
Regular price
£0.00
Unit price
per 
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Rockwool RW5 (All Sizes)
Rockwool RW5 1200mm x 600mm (All Sizes) Cavity wall Insulation
Vendor
Rockwool
Regular price
from £582.91 £699.49
Sale price
from £582.91 £699.49
Regular price
£0.00
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per 
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Rockwool RW3 Acoustic, Thermal, and Fire Performance Insulation Slabs (All Sizes)
Rockwool RW3 Acoustic, Thermal, and Fire Performance Insulation Slabs (All Sizes) Cavity wall Insulation
Vendor
Rockwool
Regular price
from £396.03 £475.24
Sale price
from £396.03 £475.24
Regular price
£0.00
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per 
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Rockwool Flexi-Slab - All Sizes
Rockwool Flexi-Slab - All Sizes Loft Insulation
Vendor
Rockwool
Regular price
from £32.08 £38.50
Sale price
from £32.08 £38.50
Regular price
£0.00
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per 
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Round Thermahood Downlight Cover
Round Thermahood Downlight Cover All Insulation
Vendor
Thermahood
Regular price
£5.80 £6.96
Sale price
£5.80 £6.96
Regular price
£0.00
Unit price
per 
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Square Thermahood Downlight Cover
Square Thermahood Downlight Cover All Insulation
Vendor
Thermahood
Regular price
£5.80 £6.96
Sale price
£5.80 £6.96
Regular price
£0.00
Unit price
per 
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Knauf RS45 (All Sizes) 600mm x 1200mm
Knauf Earthwool RS45 (600mm x 1200mm) - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £349.11 £418.93
Sale price
from £349.11 £418.93
Regular price
£0.00
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per 
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Knauf RS60 (600mm x 1200mm) - All Sizes
Knauf Earthwool RS60 (600mm x 1200mm) - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £359.64 £431.57
Sale price
from £359.64 £431.57
Regular price
£0.00
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per 
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Knauf RS140 (600mm x 1200mm) - All Sizes
Knauf Earthwool RS140 (600mm x 1200mm) - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £499.48 £599.38
Sale price
from £499.48 £599.38
Regular price
£0.00
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per 
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Knauf Rocksilk Flexible Slab (All Sizes) 1200mm x 600mm
Knauf Earthwool Flexible Slab 600mm x 1200mm - All Sizes All Insulation
Vendor
Knauf
Regular price
from £375.51 £450.61
Sale price
from £375.51 £450.61
Regular price
£0.00
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Knauf OmniFit Roll - All Sizes
Knauf Earthwool OmniFit Roll - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £1,387.63 £1,665.16
Sale price
from £1,387.63 £1,665.16
Regular price
£0.00
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Thinsulex TLX Silver Multifoil 1.2m x 10m (12m2 roll)
Thinsulex TLX Silver Multifoil 1.2m x 10m (12m2 roll) Loft Insulation
Vendor
Thinsulex
Regular price
£134.60 £161.52
Sale price
£134.60 £161.52
Regular price
£0.00
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per 
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Spacetherm Blanket (All Thicknesses) 2.4m x 1.2m
Spacetherm Blanket (All Thicknesses) 2.4m x 1.2m Loft Insulation
Vendor
Proctor
Regular price
from £145.28 £174.34
Sale price
from £145.28 £174.34
Regular price
£0.00
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per 
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Knauf OmniFit Slabs (All Sizes)
Knauf Earthwool OmniFit Slabs (All Sizes) Loft Insulation
Vendor
Knauf
Regular price
from £559.08 £670.90
Sale price
from £559.08 £670.90
Regular price
£0.00
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per 
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Knauf DriTherm 32 Mineral Wool Cavity Slabs (455mm x 1200mm) - All Sizes
Knauf Earthwool DriTherm 32 Mineral Wool Cavity Slabs (455mm x 1200mm) - All Sizes Cavity wall Insulation
Vendor
Knauf
Regular price
from £29.85 £35.82
Sale price
from £29.85 £35.82
Regular price
£0.00
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per 
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Sheepwool SilentWool Floor Insulation - 1m x 25m
Sheepwool SilentWool Floor Insulation - 1m x 25m Loft Insulation
Vendor
Sheepwool
Regular price
£87.44 £104.93
Sale price
£87.44 £104.93
Regular price
£116.58
Unit price
per 
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Actis Hybris 1200mm x 1145mm - All Sizes
Actis Hybris 1200mm x 1145mm - All Sizes All Insulation
Vendor
Actis
Regular price
from £698.16 £837.79
Sale price
from £698.16 £837.79
Regular price
£0.00
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per 
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Sheepwool SilentWool Joist Insulation - 0.1m x 10m
Sheepwool SilentWool Joist Insulation Loft Insulation
Vendor
Sheepwool
Regular price
£5.98 £7.18
Sale price
£5.98 £7.18
Regular price
£7.97
Unit price
per 
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Knauf Frametherm Slab - All Sizes
Knauf Frametherm Slab 570mm x 1170mm - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £962.75 £1,155.30
Sale price
from £962.75 £1,155.30
Regular price
£0.00
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per 
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Knauf Mineral Wool FrameTherm Roll - All Sizes
Knauf Frametherm Roll - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £1,276.47 £1,531.76
Sale price
from £1,276.47 £1,531.76
Regular price
£0.00
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per 
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Isover Acoustic Partition Roll - APR 1200 (All Sizes)
Isover Acoustic Partition Roll - APR 1200 (All Sizes) Loft Insulation
Vendor
Isover
Regular price
from £45.27 £54.32
Sale price
from £45.27 £54.32
Regular price
£0.00
Unit price
per 
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Thinsulex TLX Gold Multifoil 1.2m x 10m (12m2 roll)
Thinsulex TLX Gold Multifoil 1.2m x 10m (12m2 roll) Loft Insulation
Vendor
Thinsulex
Regular price
£224.84 £269.81
Sale price
£224.84 £269.81
Regular price
£0.00
Unit price
per 
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Sheepwool SilentWool Carpet Insulation - 1m x 10m
Sheepwool SilentWool Carpet Insulation - 1m x 10m Loft Insulation
Vendor
Sheepwool
Regular price
£79.15 £94.98
Sale price
£79.15 £94.98
Regular price
£105.53
Unit price
per 
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Knauf RS100 (600mm x 1200mm) - All Sizes
Knauf Earthwool RS100 (600mm x 1200mm) - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £534.16 £640.99
Sale price
from £534.16 £640.99
Regular price
£0.00
Unit price
per 
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Knauf DriTherm 34 (All Sizes)
Knauf Earthwool DriTherm 34 (All Sizes) Cavity wall Insulation
Vendor
Knauf
Regular price
from £929.78 £1,115.74
Sale price
from £929.78 £1,115.74
Regular price
£0.00
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per 
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Knauf SteelTherm Roll 40 (All Sizes)
Knauf Earthwool SteelTherm Roll 40 (All Sizes) 150mm / 5550mm Loft Insulation
Vendor
Knauf
Regular price
from £1,563.62 £1,876.34
Sale price
from £1,563.62 £1,876.34
Regular price
£0.00
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per 
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310ml Flexible Filler (Box of 12)
310ml FLEXIBLE FILLER (Box of 12) Loft Insulation
Vendor
Insulation4Less
Regular price
£36.00 £43.20
Sale price
£36.00 £43.20
Regular price
£0.00
Unit price
per 
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Roll Out Rafter 6m (Pack Of 10) - All Sizes
Roll Out Rafter 6m (Pack Of 10) - All Sizes Roofing
Vendor
Klober
Regular price
from £52.95 £63.54
Sale price
from £52.95 £63.54
Regular price
£0.00
Unit price
per 
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Thermafleece SupaSoft Roll
Thermafleece SupaSoft Roll
Vendor
Thermafleece
Regular price
£0.00 £0.00
Sale price
£0.00 £0.00
Regular price
£0.00
Unit price
per 
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Thermafleece CosyWool Roll
Thermafleece CosyWool Roll
Vendor
Thermafleece
Regular price
£0.00 £0.00
Sale price
£0.00 £0.00
Regular price
£0.00
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per 
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Warmline PHE Insulated Plasterboard 1.2m x 2.4m - All Sizes
Warmline PHE Insulated Plasterboard 1.2m x 2.4m - All Sizes Loft Insulation
Vendor
Warmline
Regular price
£0.00 £0.00
Sale price
£0.00 £0.00
Regular price
£0.00
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per 
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Knauf Timber Frame Party Wall Slab (All Sizes)
Knauf Earthwool Timber Frame Party Wall Slab 600mm x 1200mm - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £2,332.70 £2,799.24
Sale price
from £2,332.70 £2,799.24
Regular price
£0.00
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per 
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Knauf OmniFit Stud - All Sizes
Knauf Earthwool OmniFit Stud - All Sizes Loft Insulation
Vendor
Knauf
Regular price
from £2,687.88 £3,225.46
Sale price
from £2,687.88 £3,225.46
Regular price
£0.00
Unit price
per 
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Celotex 200mm XR4200 2.4m x 1.2m
200mm Celotex XR4200 2.4m x 1.2m Loft Insulation
Vendor
Celotex
Regular price
£88.49 £106.19
Sale price
£88.49 £106.19
Regular price
£0.00
Unit price
per 
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Knauf Frametherm Roll 40 90mm (24 Packs)
Knauf Frametherm Roll 40 90mm (‭14.25m2‬ pack) Loft Insulation
Vendor
Knauf
Regular price
£1,446.90 £1,736.28
Sale price
£1,446.90 £1,736.28
Regular price
£0.00
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DIY Loft Insulation: What do you need to know?

DIY loft insulation is a common project among many DIY enthusiasts. The work doesn't require technical knowledge and if you are planning to improve your home efficiency and reduce your annual energy costs, then loft insulation is one of the easiest solution to implement.

You will need to answer a few preliminary questions first before choosing between insulation boards or loft insulation rolls. Such as, how much does it cost to insulate a loft? How thick should the insulation be? Are there any insulation grant available? What insulation thickness should you go for? What tools do you need, and finally, how much money can you save?

As every self-respecting insulation expert and home energy advice site will tell you, insulation is one of the most effective ways to reduce your heating bills. Most people do not realise that a quarter of your home’s heat is lost through the roof! Indeed, a lot of heat escapes through convection and conduction. Therefore, insulation can make a sizable difference as it cuts the carbon footprint along with the utility bills.

Loft roll insulation cost

So much so that, for the same range of houses, the difference between a home with no loft insulation and one with 270mm of insulation can reduce the annual carbon output from 550kg to 1000kg.

Before you can purchase insulation from such brands as Knauf insulation or Rockwool let's have a look at the main types of insulation available.

Types of insulation for your loft

Before telling you about the main types of standard loft insulation, let us give you a short overview of cold and warm loft insulation.

You will need insulation between the floor joists for a cold loft – thus preventing heat from entering into the loft. This is easy to install and relatively cheaper. However, it can leave the loft subject to condensation and fluctuations in temperature. Similarly, a cold loft is not suitable if you have plans regarding storing chemical materials that are sensitive to one another or if you are planning to turn the attic into a living area.

In contrast, if you want to create a warm loft, then you would use insulation that is divided between the underside of the roof and the loft floor. What does this mean? Well, simply put, some heat will enter the loft and regulate the temperature – however, it is important to know that the heat is prevented to make an escape through the roof.

A wide variety of uses are possible for cold loft, but you need to know that flat roof insulation is much harder and more expensive than to install loft insulation between the joists.

Let’s take a look at the main types of insulation.

Sheet insulation for your loft

Sheet insulation involves firm rigid boards, which are made either from natural or synthetic materials – it is one of the best solutions for insulating your roof’s underside. In addition, if you are looking for highly effective insulation, then sheet insulation is a good fit because it provides greater efficiency. This type of insulation is slightly more costly.

Blown-Fiber insulation for your loft

Blown-Fiber is a non-DIY type insulation, in which loose materials of various types are blown in between the joists. This type of insulation is ideal for places that are hard to get by. However, Blown-fiber insulation does not offer a complete solution, particularly in a draughty loft. On top of that you will need to hire a qualified technician to get the job done.

Loose-Fill insulation for your loft

Loose-fill insulation is about lightweight material – for instance, it involves mineral wool, cellulose fiber, cork granules or recycled newspapers. Loose-fill insulation is usually used for topping up the existing insulation.

Blanket Insulation ( Loft Roll Insulation)

Last but not least, it is the most commonly used insulation, which comes in glass, mineral fiber, rolls of rock, and foil-backed felt, sheeps wool loft also known as wool loft insulation. It is an ideal all-purpose insulation, which is likewise the cheapest option available. It works great between the joists and is easy to fit.

 

Advantages of Loft Insulation

If you live in the United Kingdom, then you must know that our country has the greatest stock of oldest housing in the developed world. This is fantastic in terms of aesthetics – but this is also inefficient housing when it comes to energy consumption and heat retention.

Among the many advantages of installing insulation you will be able to prevent one half of the heat from escaping through the roof and will save up to £150 a year by installing a few rolls of insulation. Similarly, you can significantly reduce the costs of electricity and gas. Your house will produce less carbon – thus helping the environment. Your home will be cooler in the summer and warmer during winter. You won’t have any issues with condensation and will notice a reduction in noise coming from the upper levels of the home. Furthermore, you will boost your ratings on “Energy Performance Certificate,” which will help you increase the value of your home – thus increasing the saleability.

How thick should standard loft insulation be?

The UK current regulations recommends a total depth of 250-270mm of blanket style insulation in a loft. If you already have insulation, then it is worth checking its depth, as a couple of years ago, the recommended insulation depth was 200mm and older houses tend to have 100mm of fibreglass insulation between the rafters.

Does loft insulation contain asbestos?

Asbestos was banned in 1999 and is still present in about half of all residential property. If your house was built in the 20th century, we recommend you talk to an independent surveyor before carrying out any improvement work. You can have loose-fill asbestos in cavity closers, cavity walls, under floorboards, and lofts. It is actually a fluffy and loose insulation material that looks like candy floss. Additionally, it can be whitish or blue-grey in color, which is considered a dangerous asbestos material. If disturbed, it may release asbestos into the air.

How long does loft insulation last?

Insulation experts claim that loft insulation with spray foam and wrap tape can last for more than 70 years. In addition, foam-board, loose fill, rock wool, and cellulose insulation can last up to 90 years. However this is not a DIY friendly job, and requires hiring a qualified technician. In comparison, a roll of knauf insulation is much easier to install.

Loft Insulation Cost and Savings (Install Loft Insulation)

Having insulation properly installed in a loft can cut your heating and energy bills by around £250 per year. You can also save around £120-£150 worth of energy. The average cost of boarding and insulating a loft is around £1500 and depending on the complexity of the job it will usually take 3-4 days to complete. It will pay for itself in roughly 2 years! Additionally you can visit gov.grants to see if are eligible for a grant.

Here at Insulation4less, we are dedicated to providing our customers with the best Insulation products at the best prices possible. If you seek advice, our support team is eager to help and can be contacted by calling 020 3582 6399 or via our Live Chat.

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