Underfloor Insulation

Over 20% of total building heat loss is through the floor. Choose from our range of underfloor insulation and start saving money on heating bills today!

Celotex TB4000 Thermal Bridging Board 1.2m x 2.4m - All Sizes
Celotex TB4000 Thermal Bridging Board 1.2m x 2.4m - All Sizes Floor Insulation
Vendor
Celotex
Regular price
from £13.05 £15.66
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from £13.05 £15.66
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Celotex GA4000 General Purpose PIR Insulation Board (All Sizes) 2.4m x 1.2m
Celotex GA4000 General Purpose PIR Insulation Board 1.2m x 2.4m - All Sizes Floor Insulation
Vendor
Celotex
Regular price
from £13.05 £15.66
Sale price
from £13.05 £15.66
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£0.00
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Celotex XR4000 Insulation Board 1.2m x 2.4m - All Sizes
Celotex XR4000 Insulation Board 1.2m x 2.4m - All Sizes Loft Insulation
Vendor
Celotex
Regular price
from £42.84 £51.41
Sale price
from £42.84 £51.41
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£0.00
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25mm Celotex TB4025 2.4m x 1.2m
25mm Celotex TB4025 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£13.05 £15.66
Sale price
£13.05 £15.66
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£0.00
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40mm Celotex TB4040 2.4m x 1.2m
40mm Celotex TB4040 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£17.77 £21.32
Sale price
£17.77 £21.32
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30mm Celotex TB4030 2.4m x 1.2m
30mm Celotex TB4030 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£15.12 £18.14
Sale price
£15.12 £18.14
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£0.00
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20mm Celotex TB4020 2.4m x 1.2m
20mm Celotex TB4020 2.4m x 1.2m Wall Insulation
Vendor
Celotex
Regular price
£13.06 £15.67
Sale price
£13.06 £15.67
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50mm Celotex GA4050 2.4m x 1.2m
50mm Celotex GA4050 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£19.39 £23.27
Sale price
£19.39 £23.27
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100mm Celotex GA4100 2.4m x 1.2m
100mm Celotex GA4100 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£35.19 £42.23
Sale price
£35.19 £42.23
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75mm Celotex GA4075 2.4m x 1.2m
75mm Celotex GA4075 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£28.64 £34.37
Sale price
£28.64 £34.37
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70mm Celotex GA4070 2.4m x 1.2m
70mm Celotex GA4070 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£27.60 £33.12
Sale price
£27.60 £33.12
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60mm Celotex GA4060 2.4m x 1.2m
60mm Celotex GA4060 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£22.71 £27.25
Sale price
£22.71 £27.25
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90mm Celotex GA4090 2.4m x 1.2m
90mm Celotex GA4090 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£34.44 £41.33
Sale price
£34.44 £41.33
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80mm Celotex GA4080 2.4m x 1.2m
80mm Celotex GA4080 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£30.42 £36.50
Sale price
£30.42 £36.50
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120mm Celotex XR4120 2.4m x 1.2m
120mm Celotex XR4120 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£42.84 £51.41
Sale price
£42.84 £51.41
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150mm Celotex XR4150 2.4m X 1.2m
150mm Celotex XR4150 2.4m X 1.2m Floor Insulation
Vendor
Celotex
Regular price
£51.75 £62.10
Sale price
£51.75 £62.10
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140mm Celotex XR4140 2.4m x 1.2m
140mm Celotex XR4140 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£51.80 £62.16
Sale price
£51.80 £62.16
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110mm Celotex XR4110 2.4m x 1.2m
110mm Celotex XR4110 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£44.25 £53.10
Sale price
£44.25 £53.10
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130mm Celotex XR4130 2.4m x 1.2m
130mm Celotex XR4130 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£50.95 £61.14
Sale price
£50.95 £61.14
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165mm Celotex XR4165 2.4m x 1.2m
165mm Celotex XR4165 2.4m x 1.2m Wall Insulation
Vendor
Celotex
Regular price
£68.55 £82.26
Sale price
£68.55 £82.26
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Kingspan Thermafloor TF70 Floor Board (All Sizes) 2.4m x 1.2m
Kingspan Thermafloor TF70 Floor Board 1.2m x 2.4m - All Sizes Floor Insulation
Vendor
Kingspan
Regular price
from £110.48 £132.58
Sale price
from £110.48 £132.58
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Eco-versal (2.4m x 1.2m) - All Sizes
Eco-versal (2.4m x 1.2m) - All Sizes Floor Insulation
Vendor
Ecotherm
Regular price
from £16.26 £19.51
Sale price
from £16.26 £19.51
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£0.00
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Mannok Insulation Board 1.2m x 2.4m (All Sizes)
Mannok Insulation Board 1.2m x 2.4m (All Sizes) Floor Insulation
Vendor
Mannok
Regular price
from £17.33 £20.80
Sale price
from £17.33 £20.80
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£0.00
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Danosa Danopren TR XPS Insulation 600mm x 1250mm - All Sizes
Danosa Danopren TR XPS Insulation 600mm x 1250mm - All Sizes Floor Insulation
Vendor
Danosa
Regular price
from £33.50 £40.20
Sale price
from £33.50 £40.20
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£0.00
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Danosa 75mm XPS Concrete Slab Grey - 500mm x 500mm
Danosa 75mm XPS Concrete Slab Grey - 500mm x 500mm Flat Roof Insulation
Vendor
Danosa
Regular price
£6.41 £7.69
Sale price
£6.41 £7.69
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Greenguard GG300 1.25m x 0.6m - All Sizes
Greenguard (Styrozone) GG300 (1.25m x 0.6m) All Sizes Wall Insulation
Vendor
Kingspan
Regular price
from £0.00 £0.00
Sale price
from £0.00 £0.00
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£0.00
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GreenGuard GG500 600mm x 1250mm - All Sizes
GreenGuard (Styrozone) GG500 600mm x 1250mm - All Sizes Floor Insulation
Vendor
Kingspan
Regular price
from £8.46 £10.15
Sale price
from £8.46 £10.15
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£0.00
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Fibran 300L 1250mm x 600mm (All Sizes)
Fibran 300L 1250mm x 600mm (All Sizes) Floor Insulation
Vendor
Fibran
Regular price
from £30.68 £36.82
Sale price
from £30.68 £36.82
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£0.00
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BASF Styrodur XPS (1265mm x 615mm) All Sizes
BASF Styrodur XPS (1265mm x 615mm) All Sizes Insulation Board
Vendor
BASF
Regular price
from £78.02 £93.62
Sale price
from £78.02 £93.62
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£0.00
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Thin-R 2.4m x 1.2m (All Sizes)
Thin-R 2.4m x 1.2m (All Sizes) Floor Insulation
Vendor
Xtratherm
Regular price
from £0.00 £0.00
Sale price
from £0.00 £0.00
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£0.00
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EPS 70 (All Sizes) 2400mm x 1200mm
EPS 70 2400mm x 1200mm (All Sizes) Floor Insulation
Vendor
Insulation4Less
Regular price
from £51.96 £62.35
Sale price
from £51.96 £62.35
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£0.00
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Kingspan Kooltherm K103 Floorboard (All Sizes) 2400mm x 1200mm
Kingspan Kooltherm K103 Floorboard 1.2m x 2.4m - All Sizes Floor Insulation
Vendor
Kingspan
Regular price
from £237.60 £285.12
Sale price
from £237.60 £285.12
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£0.00
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Underfloor insulation - Temperature Control

Nowadays, homeowners are only starting to understand and appreciate the importance of home insulation. Insulation is one of the best ways to make your house comfortable and to control the indoor temperature. Whether you have chosen a cold or hot insulation system, the immediate results are hugely beneficial. From the tip of your roof right down to the underneath of your floor, you can insulate all the parts of your house. So now let’s discuss some of the benefits of Underfloor Insulation.

Prevents Heat Loss and Access of Cool Air

Up to 15% of heat has a chance of escaping through your floor. In this case, underfloor insulation boards help you to solve the issue. This insulation is effective in retaining heat during the winter months. Some buildings have a crawl space which is even more of a reason to install underfloor insulation. Cool air can pass through the crawl space meaning your room could be filled with unwanted cold air.

Why use a Vapour Barrier?

Moisture problems are very common in wooden floors. If wet, they become stained or warped. For these types of floors underfloor insulation is the right choice. It protects the floors against condensation build up.

Insulation - not only ideal for the Winter

Most of us think that the insulation products are useful for the winter season only. However, during hot summer days underfloor insulation can prove most beneficial to you. If your house has a basement, the rising heat can start accessing your living space. Installing underfloor insulation can prevent the access of this unwanted heat.

Foil Sheets

Foil sheet insulation is very common for insulating underfloor spaces. It is well known for its advanced abilities of trapping air and vapour.

The cheapest solution for you

When trying to more accurately control the heat of a room people often turn to the use of AC systems. These simply add to your monthly heating expenses. Installing Underfloor insulation provides more control over the temperature of a room and helps lowers annual heating bills drastically.

R-value - the higher the better right? no.

The R-value of insulation indicates its level of effectiveness. A Higher R-Value means the more powerful the insulation is. For underfloor insulation, the minimum R-value has to be R1.4. Your property condition, climate and the building type are all major factors that come into consideration when identifying the right R-value for your insulation product. You may think that it is best to have insulation with highest R-value. However, it is not always essential. It is best to get an expert opinion before commencing with the installation.

Insulation batts for underfloor insulation

This product has become a very popular choice in underfloor insulation. The insulation batts remain pressed together between joists. Best practice is to then slung the straps across these joists for the best backup and support.
You can invest in high quality and high-performance polyester insulation products which prevents any sagging issues that may arise down the line.


What Best Suits your Floor Type?

There are a huge range of different Insulation types and it is important that you pick the right one for your floor type.

Suspended Floor / Suspended Timber Floor - If you have a suspended floor, made of timber, a suitable choice of underfloor insulation would be polyester sheets or glasswool. Fit the sheets between your floor joists and you strap them securely. For optimum results you may use lining material.

In most older buildings, you can find suspended timber flooring systems. You can insulate these timber floors by raising the floorboards and laying the mineral wool beneath.



Concrete Floors - In some houses, concrete floors are present. The most popular concrete underfloor insulation choice is polystyrene board.

Underfloor Insulation - Things to Know

Placing a continuous insulation layer (polystyrene board) over a damp-proof covering will result in an increase of R-value by R0.2.
The slab edges are the major source of loss of heat. Thus, insulation of slab edge is much more important than that of the slab underside.
It is possible that your house may have waffle or conventional slab base. Polystyrene insulation is best choice for insulating it. However, the use of uPVC sheet at the outer part of this insulation panel is highly essential.

Here at Insulation4Less we aim to provide you with the highest quality insulation at the lowest prices. We hope this guide has helped you make a more informed decision on your insulation purchase.

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