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Facade Insulation

Facade Insulation involves the installation of an insulating layer to the external fabric of an existing, or new building, and is usually finished with a render and painting, or cladding, or rainscreen facade system. External wall insulation solution depends on the level of thermal performance to be achieved, which finish is the most suitable and the Reaction to Fire classification of the insulation. Using a breathable mineral rock wool solution allows moisture vapour to pass through the construction to outside, removing the risk of condensation. Rock wool is non-combustible and have the best possible A1 Euroclass Reaction to Fire classification.

New solid walls should prevent moisture ingress arising from exposure to rain and snow without moisture penetrating to the inside and damaging the building. The most important issue to be considered is the level of thermal performance to be achieved, the insulation type and which finish is the most suitable. Particular attention will need to be made to window sills, jambs, rainwater goods and the roof eaves as structural changes may be required to accommodate the thickness of the external wall insulation system. 

The best facade insulation solutions are usually comprised of rock mineral wool or expanded polystyrene (EPS). Both rock mineral wool and EPS boards have excellent thermal insulation performance, whilst rock mineral wool products are non combustible which negates the need to install fire barriers and EPS has the advantage of being lightweight.

An external wall insulation can deliver an airtight structure and reduce draughts and heat loss as any cracks and gaps in the external fabric of the building will be covered and sealed by the system. An excessive air leakage which, if not treated, can lead to high energy costs, occupant discomfort from draughts and external noise, as well as a reduction in indoor air quality.

An external wall insulation system prevents interstitial condensation from forming because the dew point temperature is moved closer to the external face of the insulated structure. Interstitial condensation occurs when warm, moist air from inside a building penetrates into the fabric of a structure and meets a cold surface, where it cools, reducing its ability to carry water vapour and increasing the risk of condensation forming within the construction. A vapour permeable insulation product can further reduce the risk of condensation forming as it will offer negligible resistance to the passage of water vapour and in effect allows the wall to breathe. It should be used in conjunction with a vapour permeable render coat. Surface condensation thus is prevented from forming on internal wall surfaces. Overlaying the existing thermal bridges with insulation removes any significant thermal bridging, reducing the heat loss and prevents condensation from forming.

CHOOSE MANUFACTURERS

Brand: Ceresit Model: 1000x500mm - 30m2
Delivery Time: In stock, 1-2 days
10mm Grey Polystyrene (Graphite EPS) for Insulated Render - Ceresit CT315 is a high quality expanded polystyrene board enhanced with integrated graphite within its bead structure. The graphite pa..
£39.33
£47.20 inc VAT
Brand: Ceresit Model: 1000x500mm - 30m2
Delivery Time: In stock, 1-2 days
10mm White Expanded Polystyrene (EPS) for Insulated Render Systems - Ceresit CT305 is a very lightweight and easy to handle and install, expanded polystyrene (EPS) board specially designed t..
£36.29
£43.55 inc VAT
Brand: Kingspan Model: 1200x400mm - 5.76m2
Delivery Time: In stock, 1-2 days
30mm Kingspan Kooltherm K5 External Wall Board is a high performance rigid thermoset phenolic insulation core faced on both sides with a glass tissue based facing bonded to the insulation core du..
£129.21
£155.05 inc VAT
Brand: Kingspan Model: 1200x400mm - 8.64m2
Delivery Time: 3 - 5 days
20mm Kingspan Kooltherm K5 External Wall Board is a high performance rigid thermoset phenolic insulation core faced on both sides with a glass tissue based facing bonded to the insulation core du..
£134.75
£161.70 inc VAT
Brand: Kingspan Model: 1200x600mm - 0.72m2
Delivery Time: Out of Stock
20mm Kingspan Kooltherm K5 External Wall Board is a high performance rigid thermoset phenolic insulation core faced on both sides with a glass tissue based facing bonded to the insulation core du..
Brand: Kingspan Model: 1200mm x 2400mm - 17.28m2
Delivery Time: 2 - 3 weeks
50mm Kingspan Kooltherm K15 Rainscreen Board is a rigid thermoset board with modified phenolic resin insulation core, covered with low emissivity composite foil on both sides. This board used in ..
£328.30
£393.96 inc VAT
50mm Rockwool Rainscreen Duo Slab (pack of 8) - pallet of 12
Guide Price
Brand: Rockwool Model: 1200mm x 600mm - 69.12m2
Delivery Time: 2 - 3 weeks
50mm Rockwool Rainscreen Duo Slab is a dual density noncombustible rigid insulation with water repellent outer surface for use in ventilated cladding systems and sealed systems such as curtain walling..
Guide Price: £1,204.05
£1,444.86 inc VAT
20mm Rockwool Frontrock S External Wall Insulation Slab - 1000mm x 600mm (pack of 8)
New Guide Price
Brand: Rockwool Model: 1000mm x 600mm - 4.8m2
Delivery Time: 1 - 2 weeks
20mm Rockwool Frontrock S is a rigid high density thermal and acoustic insulation slab made from volcanic rock, thus extremely durable, fire resistant and specifically created for external wall a..
Guide Price: £34.50
£41.40 inc VAT
Brand: Rockwool Model: 1000mm x 600mm - 3.6m2
Delivery Time: 3 - 7 days
50mm Rockwool Frontrock Plus is a rigid dual density thermal and acoustic insulation slab made from volcanic rock, thus extremely durable, fire resistant and specifically created for external wal..
50mm Rockwool Dual Density Slab for Insulated Renders - 1200mm x 600mm (pack of 4)
Guide Price
Brand: Rockwool Model: 1200mm x 600mm - 2.88m2
Delivery Time: 3 - 7 days
50mm Rockwool Dual Density Slab is a specialised dual density rock wool board that can be used for external wall insulation, where the higher density face of the board can take renders directly, while..
Guide Price: £40.60
£48.72 inc VAT
Brand: ZVM Model: 270mm x 130mm
Delivery Time: In stock, 1-2 days
270mm x 130mm Abrasive Tool (Grinder) for Polystyrene EWI boards, an essential tool used for rasping and smoothing polystyrene boards used for insulating external walls. The abrasive surface shaves of..
£17.00
£20.40 inc VAT
12.5mm Fermacell Powerpanel H2O Render Carrier Board 2600x1200mm
Guide Price
Brand: Fermacell Model: 2600mm x 1200mm - 3.12m2
Delivery Time: In stock, 1-2 days
12.5mm Fermacell Powerpanel H2O is a 2600mm x 1200mm light concrete construction render carrier board with a laminated structure, reinforced on both sides with an alkali-resistant glass-fibre mes..
Guide Price: £74.23
£89.08 inc VAT
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