Internal Wall Insulation

If the house is built using solid wall or hollow block construction methods, cavity fill insulation is not an option and internal insulation can be used. Internal insulation (sometimes referred to as 'drylining') involves fixing insulation to the inner surfaces external walls. This usually involves fixing an insulation board to the walls and covering it with a vapour barrier layer and plasterboard.

URSA, ROCKWOOL, KNAUF, CELOTEX, XTRATHERM, KAY-METZELER, CELLECTA, LOW-E, KINGSPAN


One of the main disadvantages of internal insulation is the loss of room space; this may be minimised by using high performance insulation products that are thinner. While this is often a more affordable option than installing external wall insulation, the loss of space and potential necessity to take out and re-fit fitted kitchens and appliances can result in people choosing the external insulation option.

Insulation Shop offers a wide range of high performance PIR rigid insulation from manufacturers Celotex, Xtratherm. That includes PIR boards bonded to plasterboard (Celotex PL4000) which gives user the ability to install both the insulation and plasterboard in one operation thus significantly reducing installation time.



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27.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF - Mech Fix (15mm PIR Insulation bonded to 12.5mm Plasterboard)

27.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF - Mech Fix (15mm PIR Insulation bonded to 12.5mm Plasterboard)

1200x2400 (2.88m2)  show quantity discountsDelivery Time: 2 - 3 days

Guide Price: £28.81 (£34.57 inc VAT)

£10.00/m2 (£12.00/m2 inc VAT)

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27.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF is a composite insulated panel of 15mm Xtratherm Polyiso (PIR) core with foil faces bonded to 12.5mm tapered edge plasterboard for mechanically fixing to internal walls. XT/TL-MF is designed to provide high levels of thermal insulation and dry..

Guide Price: £28.81 (£34.57 inc VAT)

£10.00/m2 (£12.00/m2 inc VAT)

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24.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF - Mech Fix (15mm PIR Insulation bonded to 9.5mm Plasterboard)

24.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF - Mech Fix (15mm PIR Insulation bonded to 9.5mm Plasterboard)

1200x2400 (2.88m2)  show quantity discountsDelivery Time: 2 - 3 days

Guide Price: £28.81 (£34.57 inc VAT)

£10.00/m2 (£12.00/m2 inc VAT)

show quantity discounts

24.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF is a composite insulated panel of 15mm Xtratherm Polyiso (PIR) core with foil faces bonded to 9.5mm tapered edge plasterboard for mechanically fixing to internal walls. XT/TL-MF is designed to provide high levels of thermal insulation and dry ..

Guide Price: £28.81 (£34.57 inc VAT)

£10.00/m2 (£12.00/m2 inc VAT)

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12mm Celotex TB4000 PIR Insulation Board

12mm Celotex TB4000 PIR Insulation Board

1200x2400mm - 2.88m2  show quantity discountsDelivery Time: 2 - 3 days

£10.40 (£12.48 inc VAT)

£3.61/m2 (£4.33/m2 inc VAT)

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Celotex TB4012 is targeted at ‘cut-to-fit’ applications between rafters or joists and enables users to achieve lower U-values with a single layer of insulation than has previously been possible. TB4012 is also appropriate for use in floors and walls. With low emissivity foil facings, TB4012 is manuf..

£10.40 (£12.48 inc VAT)

£3.61/m2 (£4.33/m2 inc VAT)

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50mm Celotex GA4000 PIR Insulation Board

50mm Celotex GA4000 PIR Insulation Board

2400x1200mm - 2.88m2  show quantity discountsDelivery Time: 1 - 2 days

£17.85 (£21.42 inc VAT)

£6.20/m2 (£7.44/m2 inc VAT)

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50mm Celotex GA4050 is a multi-purpose insulation board that provides solution to overcome from the localized thermal bridges problem. Featuring a low emissivity foil facings, this board has been manufactured from tough polyisocyanurate (PIR) by using a perfect mix of certain blowing agent..

£17.85 (£21.42 inc VAT)

£6.20/m2 (£7.44/m2 inc VAT)

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25mm Celotex FR5000 Fire Resistant PIR Insulation Board (pack of 16)

25mm Celotex FR5000 Fire Resistant PIR Insulation Board (pack of 16)

1200x2400mm - 46.08m2  show quantity discountsDelivery Time: 3 - 5 days

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Celotex FR5025 is one of the available dimensions of the Celotex FR5000 PIR insulation boards made from polyisocyanurate rigid core and faced on both side with low emissivity aluminum foils for improved thermal performance. The product is applicable to different types of constructions incl..

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10mm Sempatap Thermal Solid Wall Insulating Wallpaper

10mm Sempatap Thermal Solid Wall Insulating Wallpaper

1000x12500 - 12.5m2  show quantity discountsDelivery Time: 2 - 3 days

£204.00 (£244.80 inc VAT)

£16.32/m2 (£19.58/m2 inc VAT)

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Sempatap Thermal is 10mm thick, specifically developed as solid wall insulation and has been in use in the UK and Europe for over 30 years successfully installed in 1,000’s of flats and houses by Local Authorities, Housing Associations, private Landlords and homeowners. It is a remarkable thermal in..

£204.00 (£244.80 inc VAT)

£16.32/m2 (£19.58/m2 inc VAT)

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Sempatap Thermal Adhesive

Sempatap Thermal Adhesive

5L - Adhesive  show quantity discountsDelivery Time: 2 - 3 days

£43.05 (£51.66 inc VAT)

£3.44/m2 (£4.13/m2 inc VAT)

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Sempatap Thermal Adhesive has been specifically designed for installation of Sempatap Thermal solid wall insulation rolls also available in Insulation Shop London. One 5L tube is needed per roll of Sempatap Thermal.   ..

£43.05 (£51.66 inc VAT)

£3.44/m2 (£4.13/m2 inc VAT)

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Sempatap Thermal Sealant

Sempatap Thermal Sealant

310ml sealant  show quantity discountsDelivery Time: 2 - 3 days

£8.19 (£9.83 inc VAT)

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Sempatap Thermal Sealant is a non-silicone based sealant that has been specifically designed for bonding seams and joints of Sempatap Thermal solid wall insulation rolls. Two tubes are needed per roll of Sempatap Thermal - Wallpaper.   ..

£8.19 (£9.83 inc VAT)

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25mm Earthwool RS45 Universal Insulation Slab Knauf (pack of 20)

25mm Earthwool RS45 Universal Insulation Slab Knauf (pack of 20)

1200x600 - 14.4m2  show quantity discountsDelivery Time: 2 - 3 days

Guide Price: £30.78 (£36.94 inc VAT)

£2.14/m2 (£2.57/m2 inc VAT)

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25mm Earthwool RS45 Universal Slabs are unfaced, rock mineral wool slabs, available in a range of densities from 33 to 200 kg/m3. The standard product is supplied unfaced, but slabs can also be manufactured with a factory applied foil or tissue facing and are also available with a water repellent ad..

Guide Price: £30.78 (£36.94 inc VAT)

£2.14/m2 (£2.57/m2 inc VAT)

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50mm Earthwool RS60 Universal Insulation Slab Knauf (pack of 9)

50mm Earthwool RS60 Universal Insulation Slab Knauf (pack of 9)

1200x600 - 6.48m2  show quantity discountsDelivery Time: 1 - 2 days

Guide Price: £30.78 (£36.94 inc VAT)

£4.75/m2 (£5.70/m2 inc VAT)

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Earthwool RS60 Universal Slabs are unfaced, rock mineral wool slabs, available in a range of densities from 33 to 200 kg/m3. The standard product is supplied unfaced, but slabs can also be manufactured with a factory applied foil or tissue facing and are also available with a water repellent additiv..

Guide Price: £30.78 (£36.94 inc VAT)

£4.75/m2 (£5.70/m2 inc VAT)

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50mm ThermaFleece CosyWool Roll 370mm Wide (pack of 3)

50mm ThermaFleece CosyWool Roll 370mm Wide (pack of 3)

13000x370 - 14.43m2  Delivery Time: 2 - 3 days

Guide Price: £57.75 (£69.30 inc VAT)

£4.00/m2 (£4.80/m2 inc VAT)

Thermafleece CosyWool roll is a versatile low density insulation rich in British sheep’s wool, which would give you all round performance and value for money. It contains 75% Sheep’s wool, 15% recycled polyester and 10% polyester binder with a high recycled content making it highly environmenta..

Guide Price: £57.75 (£69.30 inc VAT)

£4.00/m2 (£4.80/m2 inc VAT)

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100mm  Superglass Acoustic Insulation Roll 11m2

100mm Superglass Acoustic Insulation Roll 11m2

100mm - 11m2  show quantity discountsDelivery Time: 1 - 2 days

£39.98 (£47.98 inc VAT)

£3.63/m2 (£4.36/m2 inc VAT)

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100mm Multi Acoustic Roll is lightweight, flexible roll of mineral wool, designed to be used as an acoustic absorbent layer in timber and metal stud partitions and in separating walls and floors in accordance with Part E (England and Wales ) and Section 5 (Scotland) acoustic requirements. Multi Acou..

£39.98 (£47.98 inc VAT)

£3.63/m2 (£4.36/m2 inc VAT)

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110mm Celotex XR4000 PIR Insulation Board

110mm Celotex XR4000 PIR Insulation Board

2400x1200mm - 2.88m2  show quantity discountsDelivery Time: 1 - 2 days

Guide Price: £37.09 (£44.51 inc VAT)

£12.88/m2 (£15.46/m2 inc VAT)

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Celotex XR4110 is targeted at ‘cut-to-fit’ applications between rafters or joists and enables users to achieve lower U-values with a single layer of insulation than has previously been possible. XR4110 is also appropriate for use in floors and walls. With low emissivity foil facings, XR4110 is manuf..

Guide Price: £37.09 (£44.51 inc VAT)

£12.88/m2 (£15.46/m2 inc VAT)

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15mm Xtratherm PIR Rigid Insulation Board

15mm Xtratherm PIR Rigid Insulation Board

TThin-R - 2400 x 1200 - 2.88m2  show quantity discountsDelivery Time: 3 - 5 days

Guide Price: £12.50 (£15.00 inc VAT)

£4.34/m2 (£5.21/m2 inc VAT)

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15mm Xtratherm Thin-r is a foil faced Polyisocyanurate (PIR) insulation board formed by a blowing process which generates rigid foam composed of fine cells filled with Pentane blowing agent trapped within the foam. Pentane has very good insulating properties and gives Thin-r superb insulating capabi..

Guide Price: £12.50 (£15.00 inc VAT)

£4.34/m2 (£5.21/m2 inc VAT)

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20mm Thermafloor TF70 PIR Insulation Board Kingspan

20mm Thermafloor TF70 PIR Insulation Board Kingspan

TF70 - 1200x2400  show quantity discountsDelivery Time: 1 - 2 days

£13.23 (£15.88 inc VAT)

£4.59/m2 (£5.51/m2 inc VAT)

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20mm Kingspan TF70 comprises a high performance rigid thermoset insulation core faced on both sides with a low emissivity composite foil facing. The product is manufactured with a blowing agent that has zero Ozone Depletion Potential(ODP) and low Global Warming Potential (GWP). CHARA..

£13.23 (£15.88 inc VAT)

£4.59/m2 (£5.51/m2 inc VAT)

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20mm Thermawall TW55 PIR Insulation Board Kingspan

20mm Thermawall TW55 PIR Insulation Board Kingspan

TW55 - 1200x2400  show quantity discountsDelivery Time: 1 - 2 days

£13.23 (£15.88 inc VAT)

£4.59/m2 (£5.51/m2 inc VAT)

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20mm Kingspan Thermawall TW55 is a stud wall PIR insulation board comprising a high performance rigid thermoset insulation core faced on both sides with a low emissivity composite foil facing. The product is manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Glob..

£13.23 (£15.88 inc VAT)

£4.59/m2 (£5.51/m2 inc VAT)

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25mm Celotex GD5025 PIR Insulation Board with 9.5mm Plasterboard (pack of 26)

25mm Celotex GD5025 PIR Insulation Board with 9.5mm Plasterboard (pack of 26)

1200x2400mm - 74.88m2  show quantity discountsDelivery Time: 3 - 5 days

£1,137.91 (£1,365.49 inc VAT)

£15.20/m2 (£18.24/m2 inc VAT)

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Celotex GD5025 is a premium performance PIR insulation bonded to 9.5mm tapered edge plasterboard. Allows for the installation of both the insulation and plasterboard in one operation, thereby reducing installation time. Simplifies compliance to current building regulations for the upgrade of interna..

£1,137.91 (£1,365.49 inc VAT)

£15.20/m2 (£18.24/m2 inc VAT)

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25mm Celotex GS5025 PIR Insulation Board with 9.5mm Plasterboard (pack of 26)

25mm Celotex GS5025 PIR Insulation Board with 9.5mm Plasterboard (pack of 26)

Celotex GS5025 - 74.88m2  show quantity discounts

Guide Price: £1,137.91 (£1,365.49 inc VAT)

£15.20/m2 (£18.24/m2 inc VAT)

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Celotex GS5025 is a premium performance PIR insulation board faced with low emissivity aluminum foils on both sides and bonded to 9.5 mm tapered edge plasterboard, providing an insulation product and a plasterboard in one. The product is designed for mechanically fixed applicatio..

Guide Price: £1,137.91 (£1,365.49 inc VAT)

£15.20/m2 (£18.24/m2 inc VAT)

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25mm EPS70 Polystyrene Insulation Board Jablite (pack of 12)

25mm EPS70 Polystyrene Insulation Board Jablite (pack of 12)

2400x1200 (34.56m2)  show quantity discountsDelivery Time: 2 - 3 days

£43.20 (£51.84 inc VAT)

£1.25/m2 (£1.50/m2 inc VAT)

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25mm Jablite EPS is a lightweight cellular plastic material suitable for a wide range of building insulation applications. It is an excellent insulating medium which exhibits consistent thermal performance over the range of temperatures normally encountered in buildings. The material is versatile, l..

£43.20 (£51.84 inc VAT)

£1.25/m2 (£1.50/m2 inc VAT)

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25mm EPS70 Polystyrene Insulation Board Kay-Metzeler (pack of 12)

25mm EPS70 Polystyrene Insulation Board Kay-Metzeler (pack of 12)

2400x1200mm - 34.56m2  show quantity discountsDelivery Time: 2 - 3 days

£43.20 (£51.84 inc VAT)

£1.25/m2 (£1.50/m2 inc VAT)

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25mm EPS70 Kay-Metzeler boards are produced by cutting expanded foam blocks. Placed above a concrete slab or a precast concrete floor in domestic ground-floor constructions, then finished with a wearing layer of chipboard to satisfy the Building Regulations' U-value requirements. Kay-Metzeler achie..

£43.20 (£51.84 inc VAT)

£1.25/m2 (£1.50/m2 inc VAT)

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25mm Isover Acoustic Partition Roll

25mm Isover Acoustic Partition Roll

20mx1.2m - 24.00m2  show quantity discountsDelivery Time: 2 - 3 days

£28.46 (£34.15 inc VAT)

£1.19/m2 (£1.43/m2 inc VAT)

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25mm Isover Acoustic partition roll (APR 1200) is a glass mineral wool, non-combustible product used for partitions, walls and floors acoustic insulation. Although very lightweight and flexible, thus easy to transport, cut into shape and install, it is very strong and highly resilient. Its non-hygro..

£28.46 (£34.15 inc VAT)

£1.19/m2 (£1.43/m2 inc VAT)

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25mm Thermawall TW50 PIR Cavity Wall Insulation Board (pack of 20)

25mm Thermawall TW50 PIR Cavity Wall Insulation Board (pack of 20)

TW50 - 1200x450 - 10.8m2  show quantity discountsDelivery Time: 3 - 5 days

Guide Price: £49.35 (£59.22 inc VAT)

£4.57/m2 (£5.48/m2 inc VAT)

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25mm Kingspan Thermapitch TW50 comprises of a high performance rigid thermoset insulation core faced on both sides with a low emissivity composite foil facing. The product is manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential&nb..

Guide Price: £49.35 (£59.22 inc VAT)

£4.57/m2 (£5.48/m2 inc VAT)

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25mm URSA Acoustic Insulation Roll

25mm URSA Acoustic Insulation Roll

1.2x20m - 24.00m2  show quantity discountsDelivery Time: 1 - 2 days

Guide Price: £29.24 (£35.09 inc VAT)

£1.22/m2 (£1.46/m2 inc VAT)

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25mm URSA Acoustic Roll is a lightweight, non-combustible, unfaced glass mineral wool product used for sound insulation of lightweight metal or wooden stud partitions in both new and existing buildings. This product is manufactured from sand, an abundant, sustainable resource and may also utilise up..

Guide Price: £29.24 (£35.09 inc VAT)

£1.22/m2 (£1.46/m2 inc VAT)

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25mm Xtratherm Safe-R Phenolic Insulation Board (pack of 12)

25mm Xtratherm Safe-R Phenolic Insulation Board (pack of 12)

2400x1200 - 34.56m2  show quantity discountsDelivery Time: 2 - 3 days

£267.24 (£320.69 inc VAT)

£7.73/m2 (£9.28/m2 inc VAT)

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25mm Xtratherm Safe-R Phenolic foam is a superior performance rigid insulation with enhanced fire performance, consisting of a Class O phenolic foam core with negligible smoke obscuration. Safe-R is faced with low emissivity aluminium facings both sides, and has a thermal conductivity as low as 0.02..

£267.24 (£320.69 inc VAT)

£7.73/m2 (£9.28/m2 inc VAT)

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25mm Yelofoam X2i Cellecta

25mm Yelofoam X2i Cellecta

2500x600mm - 1.5m2  show quantity discountsDelivery Time: 2 - 4 days

Guide Price: £16.72 (£20.06 inc VAT)

£11.15/m2 (£13.38/m2 inc VAT)

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25mm Cellecta Yelofoam is made of extruded polystyrene (XPS) foam blown with a mix of HFA & CO2 gases, containing a yellow pigment, flame retardant additive and nucleating agent. Cellecta insulation products are manufactured to the highest possible specification. Ex All product’s’ physical prope..

Guide Price: £16.72 (£20.06 inc VAT)

£11.15/m2 (£13.38/m2 inc VAT)

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32.5mm Kooltherm K17 - Kingspan - Phenolic Insulation with Plasterboard - pack of 24

32.5mm Kooltherm K17 - Kingspan - Phenolic Insulation with Plasterboard - pack of 24

K17 - 1200x2400 - 69.12m2  show quantity discountsDelivery Time: 3 - 5 days

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32.5mm Kingspan Kooltherm K17 is a wall dry–lining insulation comprising 12.5mm plasterboard facing bonded to high performance rigid phenolic insulation core. The phenolic core of  Kingspan Kooltherm K17 is manufactured with a blowing agent that has zero Ozone..

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32.5mm Kingspan Kooltherm K18 Insulated Plasterboard - pack of 24

32.5mm Kingspan Kooltherm K18 Insulated Plasterboard - pack of 24

2400x1200mm - 69.12m2  show quantity discountsDelivery Time: 2 - 4 days

Guide Price: £758.63 (£910.36 inc VAT)

£10.98/m2 (£13.18/m2 inc VAT)

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32.5mm Kingspan Kooltherm K18 is a wall dry–lining insulation comprising 12.5mm plasterboard facing bonded to high performance rigid phenolic insulation core. The phenolic core of  Kingspan Kooltherm K18 is manufactured with a blowing agent that has zero Ozone Depletion Potential and low G..

Guide Price: £758.63 (£910.36 inc VAT)

£10.98/m2 (£13.18/m2 inc VAT)

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41mm Celotex CG5000 Partial Fill Cavity Wall Board (pack of 12)

41mm Celotex CG5000 Partial Fill Cavity Wall Board (pack of 12)

450x1200mm - 6.48m2  show quantity discountsDelivery Time: 2 - 3 days

Guide Price: £62.42 (£74.90 inc VAT)

£9.63/m2 (£11.56/m2 inc VAT)

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Celotex CG5041 is especially designed for partial fill cavity wall insulation, offering great thermal performance due to substantial R and U values, with decreased board thickness and lower emissivity values due to the aluminum foil facings on both sides of the PIR core. This set of products present..

Guide Price: £62.42 (£74.90 inc VAT)

£9.63/m2 (£11.56/m2 inc VAT)

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50mm Earthwool Flexible Insulation Slab Knauf (pack of 12)

50mm Earthwool Flexible Insulation Slab Knauf (pack of 12)

1200x600 - 8.64m²  show quantity discountsDelivery Time: 2 - 3 days

£35.83 (£43.00 inc VAT)

£4.15/m2 (£4.98/m2 inc VAT)

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50mm Earthwool Flexible is a non-combustible, inorganic rock mineral wool slab, used for thermal and acoustic insulation and specifically designed for installation by friction fitting. Earthwool Flexible is odourless, non-hygroscopic, rot proof, does not sustain vermin and will not encourage th..

£35.83 (£43.00 inc VAT)

£4.15/m2 (£4.98/m2 inc VAT)

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50mm Earthwool RS100 Universal Insulation Slab Knauf (pack of 6)

50mm Earthwool RS100 Universal Insulation Slab Knauf (pack of 6)

1200x600 - 4.32m²  show quantity discountsDelivery Time: 2 - 3 days

Guide Price: £26.19 (£31.43 inc VAT)

£6.06/m2 (£7.27/m2 inc VAT)

show quantity discounts

50mm Earthwool Universal Slabs are unfaced, rock mineral wool slabs, available in a range of densities from 33 to 200 kg/m3. The standard product is supplied unfaced, but slabs can also be manufactured with a factory applied foil or tissue facing and are also available with a water repellent additiv..

Guide Price: £26.19 (£31.43 inc VAT)

£6.06/m2 (£7.27/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
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