External Wall Insulation – Mechanical Fix

Product Information

Around 35% of the energy used to heat and cool a building is lost via its external walls. External wall insulation (also known as Solid Wall Insulation) is one of the quickest and most effective ways to improve energy efficiency; whilst at the same time transforming a building’s external aesthetics.

Expanded polystyrene boards are perfect for use in an external facade system and help to provide an efficient and cost-effective energy-saving solution. S and B EPS external wall insulation is an accepted and affordable way of reducing unnecessary energy loss, by adding thermal value to the outer face of external walls.

In many new-build applications, S and B solid wall insulation is applied to a building’s external framework (brick, block, timber or steel frame)  by way of a supportive rail system. This supportive framework not only creates a natural drainage cavity to aid moisture egress but also helps towards creating a denser thermal barrier.

Similarly, an external wall rail system can also be used on dwellings such as non-traditional houses, or properties with a brittle substrate, especially where the insertion of mechanical fixings would prove detrimental to the fabric of the building.

The versatility of EPS allows it to be used with a variety of finishes including weatherboarding, cladding, tile hanging and reinforced render systems.

S and B offer various bespoke grades for thermal wall insulation; grades such as S and B External Wall Insulation, S and B Lambdatherm® (a graphite enhanced, low thermal valued board), plus EPS 70E and EPS 200E – all containing a polymeric fire retardant additive. Thermal values range depending on product and thickness from 0.038 down to 0.030 W/mk. Selected grades of EPS raw material are used for external wall applications to reduce any bowing and shrinkage of the EPS.

Recent years have seen a huge growth in the use of solid wall insulation on domestic properties, especially following government-funded initiatives such as the Green Deal and the Green Homes Grant.

Rail System Boards:

S and B Rail System Insulation Boards come in a standard dimension of 500 x 500mm, ranging from 40mm up to 250mm in height. These boards are recessed and rebated on all four sides to aid fitting to a rail system that has been mechanically fixed to an external wall.

Recycling

Expanded Polystyrene (EPS) is 100% recyclable. Any leftover waste can be disposed of via our ‘Waste Recycling Scheme’.  Ask a member of our team for further details.

Grades

S and B EPS External Walls are available in:

EPS 70E

EPS 100E

EPS 150E

EPS 200E

EPS 250E

Lambdatherm® 70E

Lambdatherm® Elite

Advantages

• Our EPS insulation boards are EWI system designer approved.
• EPS is 98% air and is, therefore, an excellent thermal insulator.
• The closed-cell structure of expanded polystyrene inhibits water absorption leaving it unaffected by the normal range of climatic conditions.
• Faster, more efficient single leaf construction can be used, creating additional internal space with improved thermal performance.
• EPS is lightweight, easy to cut and install.
• S and B EPS is manufactured in the UK!
• ETAG 004 compliant
• Green guide A+ rating
• Expanded polystyrene is 100% recyclable

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