Specification

Altherm ICF Blocks

Our premade forms fit together as large interlocking blocks. We use two EPS panels spaced apart by high strength polypropylene webs, that form an insulated permanent shuttering into which concrete is poured.

By using polypropylene instead of steel webs, we can further reduce thermal bridging and these webs maintain a core thickness between the EPS panels of either 150mm (300mm ICF block) or 200mm (350mm ICF block).

300mm - StandarD ICF Blocks

300mm Straight Form
Length x Height x Width(mm)1200 x 400 x 300
Width of Concrete Form (mm)150
Width of Concrete (m3)/m2 of wall0.014
U-Value (W/m2K)0.20
Average area weighted (Um) U-Value (W/m2K)<0.18

300mm Straight Form are comprised of two insulating EPS panels (75mm thick) connected by high strength polypropylene webs. These webs maintain a core thickness between the EPS panels of 150mm, where the concrete is poured.

  • Suitable for foundations & ground floor
  • Reversible
300mm Corner Form
Length x Height x Width (mm)1200 x 400 x 300
Width of Concrete Form (mm)150
Width of Concrete (m3)/m2 of wall0.014
U-Value (W/m2K)0.20
Average area weighted (Um) U-Value (W/m2K)<0.18

300mm Corner Form have 75mm insulating panels on either side of a 150mm core. The forms are 462mm on the short side and 862mm on the long side.

  • Suitable for foundations & ground floor
  • Reversible
300mm Vertical Cavity Closer
Length x Height x Width (mm)1200 x 400 x 300

The 300mm Vertical Cavity Closer slots neatly into either the 300mm corner or straight forms to close off the concrete core at the sides of openings.

  • Fits into 300m straight or corner ends
  • Essential to minimise thermal bridging
  • Reversible
300mm Horizontal Cavity Closer
Length x Height x Width (mm)1200 x 400 x 300

The 300mm Horizontal Cavity Closer fits neatly into either the top or bottom of the 300mm straight forms to close off the concrete core at the heads and sills of openings

  • Fits into 300m straight or corner ends
  • Essential to minimise thermal bridging
  • Reversible

350mm - ICF Block for Multi-StorEy & Apartments

350mm Straight Form
Length x Height x Width (mm)1200 x 400 x 300
Width of Concrete Form (mm)150
Width of Concrete (m3)/m2 of wall0.014
U-Value (W/m2K)0.20
Average area weighted (Um) U-Value (W/m2K)<0.18

350mm Straight Form provides a concrete core of 200mm which is sufficient bearing for hollow core thickness between the EPS panels of 150mm, where the concrete will be poured.

  • Suitable for multi-storey floor/apartments
  • Reversible
350mm Corner Form
Length x Height x Width (mm)1200 x 400 x 300
Width of Concrete Form (mm)150
Width of Concrete (m3)/m2 of wall0.014
U-Value (W/m2K)0.20
Average area weighted (Um) U-Value (W/m2K)<0.18
350mm Corner Form have 75mm insulating panels on either side of a 200mm core. The forms are 462mm on the short side and 862mm on the long side.
  • Suitable for multi-storey floor/apartments
  • Reversible
350mm Vertical Cavity Closer
Length x Height x Width (mm)1200 x 400 x 300

The 350mm Vertical Cavity Closer slots neatly into either the 350mm corner or straight forms to close off the concrete core at the sides of openings.

  • Fits into 350m straight or corner ends
  • Essential to minimise thermal bridging
  • Reversible
350mm Horizontal Cavity Closer
Length x Height x Width (mm)1200 x 400 x 300

The 350mm Horizontal Cavity Closer fits neatly into either the top or bottom of the 350mm straight forms to close off the concrete core at the heads and sills of openings

  • Fits into 350m straight or corner ends
  • Essential to minimise thermal bridging
  • Reversible

Declared Characteristics

Essential CharacteristicTechnical SpecificationProduct Performance
Declared Thermal Conductivity (50mm)IS EN 126670.030 W/mK
Compressive Strength at 10% DeformationIS EN 826:2013129 kPa
Bending StrengthIS EN 12089:2013329.65 kPa
EPS DensityIS EN 1602:2013Min 24 kg/m3
Reaction to FireIS EN ISO 11925-2, IS EN 13501-1:2007Euroclass E
Water Vapour PermeabilityIS EN 12086:20130.7208 mg/m·h·Pa
Water Absorption by Partial ImmersionIS EN 12087:20130.23 kg/m2
Water Absorption by Total ImmersionIS EN 120872.1 %

Get Quotation

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Upload your drawings and programme details and we’ll get back to you within 5 working days. Or if you prefer you can give our 
Commercial Director, Trevor Coyle, a call on +353 1 8422 823