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Facade Insulation

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.

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 particles integrated within the insulation beads reflects radiant heat and significantly improves insu..
£32.50
£39.00 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 to be used as a part of various external wall insulation systems. It can be used in applications requ..
£29.99
£35.99 inc VAT
Brand: Kingspan Model: 1200x600mm - 18m2
Delivery Time: In stock, 1-2 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 during manufacture. The Kooltherm K5 External Wall Board is manufactured with a blowing agent that has..
£179.85
£215.82 inc VAT
Single Board 20mm Kingspan Kooltherm K5 External Wall Board - 1200mm x 600mm
New Guide Price
Brand: Kingspan Model: 1200x600mm - 0.72m2
Delivery Time: In stock, 1-2 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 during manufacture. The Kooltherm K5 External Wall Board is manufactured with a blowing agent that has..
Brand: Kingspan Model: 1200mm x 2400mm - 17.28m2
Delivery Time: 2 - 3 Days
50mm Kingspan Kooltherm K15 Rainscreen Board is a rigid thermostat board with modified phenolic resin insulation core, covered with low emissivity composite foil on both sides. This board used in ventilated cladding applications. The board is made environmentally friendly, with 0 ODP and low GWP blo..
£273.19
£327.83 inc VAT
8mm Cembrit Cempanel - Cement Particle Board - 2400mm x 1200mm
Hot Guide Price
Brand: Cembrit Model: 2400mm x 1200mm - 2.88m2
Delivery Time: In stock, 1-2 days
8mm Cembrit Cempanel is a strong, durable, impact resistant homogeneous cement particle board for external facade applications that is far superior to timber panels. It combines the strength of cement with the flexibility of wood. The combination of chips and cement creates a board that is..
Guide Price: £25.72
£30.86 inc VAT
12.5mm Fermacell Powerpanel H2O Render Carrier Board 2600x1200mm
Hot 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 mesh. It can be used for both internal and external applications exposed to high levels of moisture. Fe..
Guide Price: £47.85
£57.42 inc VAT
Brand: Resistant Building Products Model: 2400mm x 1200mm - 2.88m2
Delivery Time: 2 - 3 Days
12mm Multi-Rend is a high strength external noncombustible render carrier board that can be used in any location in the UK. The board is made of Magnesium Oxide and has a 4 layer alkaline resistant fibreglass mesh front, which is a heavily keyed surface designed to receive any kind of render, paint,..
£46.80
£56.16 inc VAT
12.5mm Siniat Weather Defence External Sheathing Board -  2400mm x 1200mm
Guide Price
Brand: Siniat Model: 2400mm x 1200mm - 2.88m2
Delivery Time: 2 - 4 days
12.5mm Siniat Weather Defence is a strong, noncombustible external sheathing board that gives superior weather protection and allows the building to be covered for the internal work to begin earlier. The board is made of gypsum and has a patented hydrophobic core and a water resistant face liner. Si..
Guide Price: £39.00
£46.80 inc VAT
6mm RCM Multipurpose - Cellulose Fibre Cement Board - 2400mm x 1200mm
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Brand: RCM Model: 2400mm x 1200mm - 2.88m2
Delivery Time: In stock, 1-2 days
6mm RCM Multipurpose Board is a noncombustible, versatile cellulose fibre cement building board offering excellent strength and excellent weathering and acoustic properties and the workability of wood. RCM Multipurpose board has a smooth face to be fixed outermost and a textured face for the back. I..
Brand: RCM Model: 2400mm x 1200mm - 2.88m2
Delivery Time: In stock, 1-2 days
9mm Renderflex is a cellulose fibre cement based render carrier board, primarily used as base board for polymer modified render systems that offers substantial tensile strength and minimal movement, reducing stress applied to the render system. Renderflex has high resistance to ingress of moisture a..
£41.82
£50.18 inc VAT
6mm Cembrit HD - Heavy Duty Base Board for External Applications - 2500mm x 1250mm
Hot Guide Price
Brand: Cembrit Model: 2500mm x 1250mm - 3.05m2
Delivery Time: In stock, 1-2 days
6mm Cembrit HD is a strong, durable, impact resistant homogeneous fibre-cement base board for external facade applications. It is a uncoated, untreated high density board of natural grey colour that can be used as a cladding board that can withstand extreme climatic situations. Cembrit HD can be pai..
Guide Price: £58.75
£70.50 inc VAT
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