Internal Wall Insulation

Up to 35% of heat is lost through poorly insulated walls in homes. Upgrading your internal wall insulation is an excellent way to make long-term savings and improve the comfort of your home.

Celotex GA4000 General Purpose PIR Insulation Board 50mm to 100mm 2.4m x 1.2m
Celotex GA4000 General Purpose PIR Insulation Board 50mm to 100mm 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
from £15.66 £18.79
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from £15.66 £18.79
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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
£23.28 £27.94
Sale price
£23.28 £27.94
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£0.00
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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
£41.44 £49.73
Sale price
£41.44 £49.73
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£0.00
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Rockwool RWA45 (All Sizes)
Rockwool RWA45 (All Sizes) Floor Insulation
Vendor
Rockwool
Regular price
from £16.57 £19.88
Sale price
from £16.57 £19.88
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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
£15.66 £18.79
Sale price
£15.66 £18.79
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£0.00
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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
£34.12 £40.94
Sale price
£34.12 £40.94
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£0.00
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Celotex TB4000 Thermal Bridging Board 1.2m x 2.4m - 25mm to 40mm
Celotex TB4000 Thermal Bridging Board 1.2m x 2.4m - 25mm to 40mm Floor Insulation
Vendor
Celotex
Regular price
from £15.66 £18.79
Sale price
from £15.66 £18.79
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£0.00
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Celotex PL4000 Insulated Plasterboard (All Sizes) 2.4m x 1.2m
Celotex PL4000 Insulated Plasterboard (All Sizes) 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
from £39.12 £46.94
Sale price
from £39.12 £46.94
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£0.00
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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
£51.39 £61.67
Sale price
£51.39 £61.67
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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
£21.19 £25.43
Sale price
£21.19 £25.43
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Celotex XR4000 Insulation Board 1.2m x 2.4m - 110mm to 200mm
Celotex XR4000 Insulation Board 1.2m x 2.4m - 110mm to 200mm Loft Insulation
Vendor
Celotex
Regular price
from £51.24 £61.49
Sale price
from £51.24 £61.49
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£0.00
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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
£32.86 £39.43
Sale price
£32.86 £39.43
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£0.00
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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
£26.61 £31.93
Sale price
£26.61 £31.93
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£0.00
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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
£61.64 £73.97
Sale price
£61.64 £73.97
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£0.00
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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
£39.94 £47.93
Sale price
£39.94 £47.93
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£0.00
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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
£17.86 £21.43
Sale price
£17.86 £21.43
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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 £18.84 £22.61
Sale price
from £18.84 £22.61
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£0.00
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Gyproc ThermaLine Basic Insulation 1.2m x 2.4m (All Sizes)
Gyproc ThermaLine Basic Insulation 1.2m x 2.4m (All Sizes) Wall Insulation
Vendor
British Gypsum
Regular price
from £23.17 £27.80
Sale price
from £23.17 £27.80
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£0.00
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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
£35.78 £42.94
Sale price
£35.78 £42.94
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Celotex PL4025 37.5mm 2.4m x 1.2m
Celotex PL4025 37.5mm 2.4m x 1.2m Wall Insulation
Vendor
Celotex
Regular price
£39.12 £46.94
Sale price
£39.12 £46.94
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£0.00
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Celotex PL4050 62.5mm 2.4m x 1.2m
Celotex PL4050 62.5mm 2.4m x 1.2m Wall Insulation
Vendor
Celotex
Regular price
£51.62 £61.94
Sale price
£51.62 £61.94
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£0.00
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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 £61.43 £73.72
Sale price
from £61.43 £73.72
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£0.00
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Celotex PL4040 52.5mm 2.4m x 1.2m
Celotex PL4040 52.5mm 2.4m x 1.2m Wall Insulation
Vendor
Celotex
Regular price
£46.50 £55.80
Sale price
£46.50 £55.80
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£0.00
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Warmline XPS Insulated Plasterboard 1.2m x 2.4m - All Sizes
Warmline XPS Insulated Plasterboard 1.2m x 2.4m - All Sizes Loft Insulation
Vendor
Warmline
Regular price
from £0.00 £0.00
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from £0.00 £0.00
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£0.00
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Celotex PL4060 72.5mm 2.4m x 1.2m
Celotex PL4060 72.5mm 2.4m x 1.2m Wall Insulation
Vendor
Celotex
Regular price
£54.83 £65.80
Sale price
£54.83 £65.80
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£0.00
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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 £304.23 £365.08
Sale price
from £304.23 £365.08
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£0.00
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140mm Celotex XR4140 Insulation Board 2.4m x 1.2m
140mm Celotex XR4140 Insulation Board 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£59.16 £70.99
Sale price
£59.16 £70.99
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£0.00
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Kingspan Thermawall TW55 Steel/Timber Framing Board (All Sizes) 2.4m x 1.2m
Kingspan Thermawall TW55 Steel/Timber Framing Board (All Sizes) 2.4m x 1.2m Wall Insulation
Vendor
Kingspan
Regular price
from £0.00 £0.00
Sale price
from £0.00 £0.00
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
£79.63 £95.56
Sale price
£79.63 £95.56
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£0.00
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Warmline PIR Insulated Plasterboard 1.2m x 2.4m - All Sizes
Warmline PIR Insulated Plasterboard 1.2m x 2.4m - All Sizes Loft Insulation
Vendor
Warmline
Regular price
from £0.00 £0.00
Sale price
from £0.00 £0.00
Regular price
£0.00
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per 
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EcoTherm Eco-versal Insulation Board (2.4m x 1.2m) - All Sizes
Eco-versal (2.4m x 1.2m) - All Sizes Floor Insulation
Vendor
Ecotherm
Regular price
from £18.07 £21.68
Sale price
from £18.07 £21.68
Regular price
£0.00
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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
£51.24 £61.49
Sale price
£51.24 £61.49
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£0.00
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Why do you need Internal Wall insulation?

Internal wall insulation is an essential way of insulating your home to maintain heat and to keep your home warm. Wall insulation is extremely necessary in colder countries as it locks in the heat and blocks out the cold and harsh weather. The installation of Internal wall insulation means you cut costs on energy bills while enjoying a more comfortable living environment. Let’s now talk about the need of Internal Wall insulation and its key benefits in a little more detail.

Acoustic Insulator – Insulation works great when it comes to reducing noise pollution. One of the most important purposes of internal wall insulation is being comfortable in your home, and with well insulated walls one can relax especially at night as external sounds are muted. You do not have to worry about a single pinch of sound once you have installed high quality wall insulation.

Temperature Control – Temperature control is what these wall insulators do best. They will minimize the cold and heat up the environment within your homes. There will be no waste of energy through your walls, and this allows you to make sure that the temperature is well maintained. One can also expect a lower electricity bill every month, and that can be a quick money saver also.

Fire Protection - Internal wall insulation is a great way to protect from fire. In the event of a fire, our non-combustible insulation slows the spread of the flames. In addition, polystyrene boards can help resist fire, and they are very good retardants during an emergency. Big organizations and offices use internal wall insulators with fireproofing as an extra precaution as they are more prone to experiencing short circuits.

Condensation Reduction - The use of Mineral wools, Natural materials, Foam boards and planned ventilation is required results in far less condensation build up. Eliminating Condensation is a significant task that should be performed correctly to get the most out of your insulation.

Things worth knowing when installing wall thermal insulation

There will be cold bridges, floor voids and other reveals that must be taken care of. One must remove everything that is fixed on the walls such as – radiators, pipes, covings, kitchen cabinets, Kitchen cabinets, light switches, curtain rails, fitted wardrobes etc. Chalking out the right methods are necessary before installing insulators. Fix insulation by building a stud wall.The connecting of the joints and skimming of plasterboard is necessary to give it the finishing needed for optimum results.

Preparing the walls for internal insulation

It is important to check the condition of the wall. The condition of the walls will determine the preparation that is needed. You must inspect damp areas and decide whether the old plaster needs to be hacked off. There are many factors to verify –

-Whether the insulators can be fixed with the help of adhesive

-Whether you need mechanical fixing

-Whether battening is required to provide a flat surface



If the wall is damp, then the insulators can worsen the temperature of the wall and this will result in more dampness/damage. If you have a damp wall, then you must make sure that all the damp is taken care of first. By redoing the wall with damp proof materials along with a fresh coat of paint you will be in a better decision to install insulation and receiving positive results.

Dry lining Insulation

This is a process by which internal walls are fixed with insulators with dry lining instead of plastering, and this can be a quick alternative. Dry lining involves masonry of metal and timber and unlike traditional plastering; this needs no water at all. This new type of insulation fixing can increase thermal efficiency. One needs to be cautious in selecting the right plasterboard because these are available in a large range of different sizes and lengths. The process of installation is effortless, and you only need to know the right method to go about it. If you are about to fix dry lining to metal or timber frames, tacking or using screws is the best approach.



The pros of internal wall insulation

-Less expensive than the external wall insulation.

-If you cannot insulate your property externally then this might be the only option for you.

-You can have breathability and ventilation with this IWI.

-They are not very costly, and they are sorted by their Width, thermal conductivity, length, price, thickness, coverage, brand and category meaning you are spoiled for choice.



We here at Insulation4Less hope to have successfully informed you of all the benefits internal wall insulation has to offer! Go ahead and browse our large range of insulation and remember that a member of our support team is always here to help!
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