Collection: All Insulation

Are you in the market for some new insulation? Look no further than Insulation4less! We've got a great selection of insulating materials for sale, so you can find the perfect product for your needs. Whether you're looking to insulate your attic or garage, or you want to make sure your home is well insulated, we've got you covered. Check out our selection today!

Huge range from all the top brands. Suitable for all applications from floor, roof, loft, wall and more. Need expert advice? Contact us by phone on 020 3582 6399, or
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Celotex GA4000 General Purpose PIR Insulation Board 2.4m x 1.2m (All Sizes)
Celotex GA4000 General Purpose PIR Insulation Board 50mm to 100mm 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
from £14.49 £17.39
Sale price
from £14.49 £17.39
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£0.00
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Knauf Bonding Compound Plasterboard Adhesive 25kg
Knauf Bonding Compound Plasterboard Adhesive 25kg All Insulation
Vendor
Knauf
Regular price
£7.48 £8.98
Sale price
£7.48 £8.98
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£0.00
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Celotex 30mm TB4030 2.4m x 1.2m
30mm Celotex TB4030 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£17.44 £20.93
Sale price
£17.44 £20.93
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£0.00
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Kingspan Thermafloor TF70 Floor Board (All Sizes) 2.4m x 1.2m
Kingspan Thermafloor TF70 Floor Board (All Sizes) 2.4m x 1.2m Floor Insulation
Vendor
Kingspan
Regular price
from £112.72 £135.26
Sale price
from £112.72 £135.26
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£0.00
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Tyvek Housewrap 100m x 1.4m
Tyvek Housewrap 100m x 1.4m All Insulation
Vendor
Tyvek
Regular price
£95.83 £115.00
Sale price
£95.83 £115.00
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£0.00
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Kingspan Thermaroof TR27 Flat Roof Board - All Sizes
Kingspan Thermaroof TR27 Flat Roof Board - All Sizes All Insulation
Vendor
Kingspan
Regular price
from £70.00 £84.00
Sale price
from £70.00 £84.00
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£0.00
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Kingspan Kooltherm K103 Floorboard (All Sizes) 2400mm x 1200mm
Kingspan Kooltherm K103 Floorboard (All Sizes) 2400mm x 1200mm Floor Insulation
Vendor
Kingspan
Regular price
from £267.24 £320.69
Sale price
from £267.24 £320.69
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£0.00
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Kingspan Thermaroof TR26 Flat Roof Board (All Sizes) 2400mm x 1200mm
Kingspan Thermaroof TR26 Flat Roof Board (All Sizes) 2400mm x 1200mm All 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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Kingspan Kooltherm K106 90mm x 1.2m x 0.45m (2.16m2)
Kingspan Kooltherm K106 90mm x 1.2m x 0.45m All Insulation
Vendor
Kingspan
Regular price
£82.94 £99.53
Sale price
£82.94 £99.53
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£0.00
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Kingspan Kooltherm K107 Pitched Roof Board (All Sizes) - 2.4m x 1.2m
Kingspan Kooltherm K107 Pitched Roof Board (All Sizes) - 2.4m x 1.2m Roof Insulation
Vendor
Kingspan
Regular price
from £229.75 £275.70
Sale price
from £229.75 £275.70
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Kingspan Kooltherm K118 Insulated Plasterboard (All Sizes) 2.4m x 1.2m
Kingspan Kooltherm K118 Insulated Plasterboard (All Sizes) 2.4m x 1.2m All Insulation
Vendor
Kingspan
Regular price
from £914.38 £1,097.26
Sale price
from £914.38 £1,097.26
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£0.00
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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
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Kingspan Kooltherm K108 Cavity Board (All Sizes) 1200mm x 450mm
Kingspan Kooltherm K108 Cavity Board (All Sizes) 1200mm x 450mm All Insulation
Vendor
Kingspan
Regular price
from £91.41 £109.69
Sale price
from £91.41 £109.69
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£0.00
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Enhanced EPS 1200mm x 600mm - All Sizes
Enhanced EPS 1200mm x 600mm - All Sizes External Wall Insulation
Vendor
EPS
Regular price
from £2.49 £2.99
Sale price
from £2.49 £2.99
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£0.00
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Knauf XPS Thermal Laminate Plus 1.2m x 2.4m - All Sizes
Knauf XPS Thermal Laminate Plus 1.2m x 2.4m - All Sizes Plasterboard
Vendor
Knauf
Regular price
from £914.24 £1,097.09
Sale price
from £914.24 £1,097.09
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£0.00
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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
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£0.00
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Kingspan Kooltherm K112 Framing Board (All Sizes) - 2.4m x 1.2m
Kingspan Kooltherm K112 Framing Board (All Sizes) - 2.4m x 1.2m Wall Insulation
Vendor
Kingspan
Regular price
from £276.00 £331.20
Sale price
from £276.00 £331.20
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£0.00
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Kingspan Kooltherm K12 Framing Board (All Sizes) - 2.4m x 1.2m
Kingspan Kooltherm K12 Framing Board (All Sizes) - 2.4m x 1.2m All Insulation
Vendor
Kingspan
Regular price
from £252.36 £302.83
Sale price
from £252.36 £302.83
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£0.00
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Rectangle Thermahood Downlight Cover
Rectangle Thermahood Downlight Cover All Insulation
Vendor
Thermahood
Regular price
£5.80 £6.96
Sale price
£5.80 £6.96
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£0.00
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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
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£0.00
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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
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£0.00
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Kingspan Nilvent Breathable Membrane (75m2 roll)
Kingspan Nilvent Breathable Membrane (75m2 roll) All Insulation
Vendor
Kingspan
Regular price
£121.00 £145.20
Sale price
£121.00 £145.20
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HControl Hybrid 45mm x 1.6m x 6.25m (Roll size 10m2)
HControl Hybrid 45mm x 1.6m x 6.25m (Roll size 10m2) All Insulation
Vendor
Actis
Regular price
£73.67 £88.40
Sale price
£73.67 £88.40
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Knauf EPS Thermal Laminate 1.2m x 2.4m T/E - All Sizes
Knauf Thermal Laminate 1.2m x 2.4m T/E - All Sizes Plasterboard
Vendor
Knauf
Regular price
from £802.25 £962.70
Sale price
from £802.25 £962.70
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Kingspan Kooltherm K15 Rainscreen Board (All Sizes) 2.4m x 1.2m
Kingspan Kooltherm K15 Rainscreen Board (All Sizes) 2.4m x 1.2m All Insulation
Vendor
Kingspan
Regular price
from £244.76 £293.71
Sale price
from £244.76 £293.71
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Kingspan Kooltherm K110 Soffit Board (All Sizes) - 2.4m x 1.2m
Kingspan Kooltherm K110 Soffit Board (All Sizes) - 2.4m x 1.2m All Insulation
Vendor
Kingspan
Regular price
from £270.58 £324.70
Sale price
from £270.58 £324.70
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£0.00
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Recticel Eurothane PL (2.4m x 1.2m) All Sizes
Recticel Eurothane PL (2.4m x 1.2m) All Sizes Insulation
Vendor
Recticel
Regular price
from £48.42 £58.10
Sale price
from £48.42 £58.10
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£0.00
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Thermaroof TR24 (All Sizes) 1200mm x 600mm
Thermaroof TR24 (All Sizes) 1200mm x 600mm All Insulation
Vendor
Kingspan
Regular price
from £56.14 £67.37
Sale price
from £56.14 £67.37
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£0.00
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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
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£0.00
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Corex Fire Plasterboard TE - 2.4m x 1.2m x 12.5mm (Pallet Of 60 Sheets)
COREX Fire Plasterboard TE 2.4m x 1.2m x 12.5mm (Pallet Of 60 Sheets) 12.5mm (60 Sheets) Insulation Board
Vendor
Corex
Regular price
£566.67 £680.00
Sale price
£566.67 £680.00
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£0.00
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Aluminium 2.5m Starter Track/ Base Profile - All Sizes
Aluminium 2.5m Starter Track/ Base Profile - All Sizes External Wall Insulation
Vendor
Wetherby
Regular price
from £8.74 £10.49
Sale price
from £8.74 £10.49
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£0.00
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Rockwool Rainscreen Duo Slab (All Sizes)
Rockwool Rainscreen Duo Slab (All Sizes) External Wall Insulation
Vendor
Rockwool
Regular price
from £828.01 £993.61
Sale price
from £828.01 £993.61
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£0.00
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Thermaclass Cavity Wall 21 (1190mm x 450mm) - All Sizes
Thermaclass Cavity Wall 21 (1190mm x 450mm) - All Sizes Insulation
Vendor
Celotex
Regular price
from £1,260.00 £1,512.00
Sale price
from £1,260.00 £1,512.00
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£0.00
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Kingspan Aquazone Infiltration (300M2 per roll)
Kingspan Aquazone Infiltration (300M2 per roll) All Insulation
Vendor
Kingspan
Regular price
£589.29 £707.15
Sale price
£589.29 £707.15
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£0.00
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Ecotherm Eco Deck 1.2m x 2.4m (+ 6mm Ply) - All Sizes
Ecotherm Eco Deck 1.2m x 2.4m (+ 6mm Ply) - All Sizes All Insulation
Vendor
Ecotherm
Regular price
from £2,204.17 £2,645.00
Sale price
from £2,204.17 £2,645.00
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£0.00
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Masonry Fixings 10mm (Box of 200) - All Sizes
Masonry Fixings 10mm (Box of 200) - All Sizes External Wall Insulation
Vendor
Insulation4Less
Regular price
from £22.30 £26.76
Sale price
from £22.30 £26.76
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£0.00
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Kingspan Kooltherm Cavity Closers - All Sizes
Kingspan Kooltherm Cavity Closers - All Sizes All 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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Superfoil SFBA BB 4mm x 1.35m x 50m
Superfoil SFBA BB 4mm x 1.35m x 50m Insulation
Vendor
Superfoil
Regular price
£156.14 £187.37
Sale price
£156.14 £187.37
Regular price
£0.00
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Hammer Fixings Hit-M (Box of 100) - All Sizes
Hammer Fixings Hit-M (Box of 100) - All Sizes External Wall Insulation
Vendor
Insulation4Less
Regular price
from £5.71 £6.85
Sale price
from £5.71 £6.85
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£0.00
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Weathercoat 422 Grey (68622) 20 Litres
Weathercoat 422 Grey (68622) 20kg External Wall Insulation
Vendor
Wetherby
Regular price
£66.21 £79.45
Sale price
£66.21 £79.45
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£0.00
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Kingspan Thermataper TT46
Kingspan Thermataper TT46
Vendor
Kingspan
Regular price
£0.00 £0.00
Sale price
£0.00 £0.00
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£0.00
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Kingspan Thermataper TT47
Kingspan Thermataper TT47
Vendor
Kingspan
Regular price
£0.00 £0.00
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£0.00 £0.00
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£0.00
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Profloor Support Batten
Profloor Support Batten Accessories
Vendor
Proctor
Regular price
from £7.72 £9.26
Sale price
from £7.72 £9.26
Regular price
£0.00
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Profloor Solo Batten
Profloor Solo Batten Insulation
Vendor
Proctor
Regular price
from £5.95 £7.14
Sale price
from £5.95 £7.14
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£0.00
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Profloor Excel Batten
Profloor Excel Batten Insulation
Vendor
Proctor
Regular price
from £8.89 £10.67
Sale price
from £8.89 £10.67
Regular price
£0.00
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Profloor Dynamic Batten
Profloor Dynamic Batten Insulation
Vendor
Proctor
Regular price
from £8.53 £10.24
Sale price
from £8.53 £10.24
Regular price
£0.00
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Ecotherm PrO Versal 1.2m x 2.4m - All Sizes
Ecotherm PrO Versal 1.2m x 2.4m - All Sizes All Insulation
Vendor
Ecotherm
Regular price
from £208.60 £250.32
Sale price
from £208.60 £250.32
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£0.00
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Ecotherm Eco Torch (1.2m x 0.6m) - All Sizes
Ecotherm Eco Torch (1.2m x 0.6m) - All Sizes All Insulation
Vendor
Ecotherm
Regular price
from £42.26 £50.71
Sale price
from £42.26 £50.71
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£0.00
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What Is Insulation?

 

Insulation is a process to keep sound, electricity and heat from spreading. A material specially designed to prevent the transmission of heat or sound from one space to other is known as insulation material. The ultimate purpose of insulation is to create a barrier around the building which helps in reduction of the amount of heating needed on a cold day or vice versa. All year round you can keep the desired temperature in your house by the help of insulation.

 

How does insulation work?

 

You will need to understand heat flow if you want to understand how insulation works. Heat is transmitted in three different way like convection, conduction, and radiation. Thermal insulation works by restricting the movement of heat in any form providing a much more comfortable place to live in.

The combination of these two characteristics plays a main role in the quality of insulation

  • The natural capacity of insulation material to inhibit the transmission of heat.
  • Natural insulants which are trapped inside the pockets of insulation material.

 

What is R-Value?

 

R-value is the measure of resistance to heat flow in a material means the level of heat transfer from warm space to colder space. A material will work more effectively when the R-value of the material is higher. R-value is calculated by dividing the thickness of the material by its thermal conductivity. Therefore, the unit of R-value is m2K/W.

R-values are also the reciprocal of the U-values means the higher the R-value of the material the lower will be the U-value of the material.

R-value is affected by

  • The type of insulation
  • Density of the material
  • Thickness of the material
  •  

What is U-value?

 

U-value is also known as thermal transmittance. U-value is used to measure the efficiency of the insulation material in the construction. The lower the U-value of the material the slower the heat will transmit through the material.

 

U-value is a combination of all materials used in the construction including timber, foil tape, membranes etc 

 

Building regulation has set some standards in part L of the approved document which is mandatory to be achieved while carrying out building work.

 

What are the types of insulation?

 

Thermal insulation

Thermal insulation prevents or reduce heat loss and reduces the amount of money and gas and electricity we use to do this. With ever-rising energy costs if the house is properly insulated it can save up to 2/3 of the energy required.

 

Acoustic insulation

The sound that causes trouble to others is nothing but undesirable an unaccepted sound. Acoustic insulation is also known as sound insulation or soundproof insulation. The purpose of acoustic insulation is to block or decrease the intensity of soundwaves transmitting from outside the house to inside or vice versa.

 

Fire-resistant insulation

Fire-resistant insulation material slows the spread of fire and protects the building. Fire-resistant insulation material is specially designed to resist high temperature and ensure no toxic smoke is released if it does come in contact with flames.

Fire resistance insulation materials are classified in various ratings as follows

 

A1- non-combustible

A2- limited combustible

B-F - Low- high contribution to fire.

Insulation materials can be categorized based on various factors like its composition, form, and structural contribution.

The cavity closer acts as a seal, preventing external water vapour and damp from entering the cavity wall and the building, whilst also preventing heat from being lost through the gap. Cavity closers can be used in a range of different constructions, including masonry, timber frame and steel frame systems.

 

Another thing you may wish to consider when looking to reduce your heating bills is to use efficient doors and windows. A customer reported big improvements in their heating costs by installing a upvc door in their kitchen. There is no point in insulating your house if you let your heating escape straight into the garden and out onto the decking! It is definitely one to add to the list.

 

Why ventilation is important?

 

Ventilation plays a vital role when it comes to insulating a space. Ventilation helps to remove harmful substances from the air inside the building also eradicates moisture and provides fresh air inside the house.

 

A poorly ventilated house can have serious health consequences like fatigue, headaches, sinus congestion, dizziness, shortness of breath, and nausea. On the other hand, it can also damage the walls and fabric of the house with condensation and mould especially in high moisture areas like the bathroom.

 

What is the importance of insulation?

  • Insulation reduces heating cost
  • Control condensation
  • Improves thermal comfort
  • Reduces the amount of noise
  • Increases fire-resistant of your house
  • Increases the value of the property
  • Increases comfort
  • Protection against fire

 

Installing loft insulation

 

Loft insulation is the easiest way to improve comfort and save money in your home.

 

A well-insulated loft can reduce heat loss through the roof. That means you'll have a cosier home which will reduce your heating costs.

 

Choosing loft insulation

 

There are different types of loft insulation and they vary in cost and performance. So choose the one which best suits your needs.

The insulation typically comes in rolls or slabs which are pre-cut at common widths. Popular brands include Isover and Knauf.

 

For more information on choosing loft insulation, see our loft insulation page. We also sell a huge range of roofing products such as roofing membranes and roofing tiles on our sister site Build4less.

 

DIY Loft Insulation

 

Many people choose to install loft insulation themselves, as it works out much cheaper and is an easy job for most people. (Be warned - installing loft insulation is a messy job and you should definitely wear a mask, goggles and gloves!)

 

The first step is to measure your loft. You can then work out how much material you need (see our guide on measuring).

 

You might also consider boarding your loft at the same time, it's a smart way to add extra storage for your tools and household accessories.

Just be careful of electric cables. Electric cables are generally fine to cover with insulation, but you should consult with an electrician to be sure.  

 

For more detailed information see our diy loft insulation page.

 

Cavity wall insulation

 

Cavity wall insulation is an effective way to reduce the amount of heat that escapes from your home. It's also one of the most popular insulation retrofit options.

 

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All new builds must insulate their cavity walls to meet building regulations.

 

New builds typically use pir insulation or another similar insulation board to insulate because you have access to the cavity while building. This offers the best performance for the cost.

 

For an existing home, the installation involves using a spray type insulation such as beads or a foam which can be pumped into the wall. This is a technical process and the user needs to be well trained and used to the process in order to get the best results.

 

For our full range of cavity wall insulation options for new builds, click here.

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