Building energy efficient walls

PolySteel Warmerwall is the revolutionary way to build house walls. We call our building block a PolySteel Form.

A PolySteel Form is probably the largest insulating concrete form in the business meaning you cover more wall area faster. In addition, the form arrives to you preassembled which means you can get on with the job at hand straight away.

Standard Size

The standard straight form is 1200mm length x 600mm high, building 0.72m² of wall area with every form put in place.

This, together with pre-formed right and left-handed corners, makes for a very fast building method.

Core Sizes

Forms are available in two overall widths 280mm and 330mm.

280mm: This form has 2 sheets of EPS Insulation with each sheet 65mm thick along with a 150mm concrete core. These forms are usually used in the construction of walls in buildings under 4 storeys in height.

330mm: This form is similar in that it also has 2 sheets of EPS Insulation with each sheet 65mm thick along with a 200mm concrete core. This core size is usually required for basements, pools and buildings of over 4 storeys in height.

Steel Ties & Fixing Strips:

This patented design is engineered to maximise strength. The tensile strength and high strength:size ratio of steel gives PolySteel a cross tie more than twice as strong as plastic cross-ties found in other ICFs. The forms also have Steel Fixing Strips every 150mm on a vertical plane to allow heavy loads (radiators, wall cupboards and external fittings) to be attached to the walls, saving time for follow-on trades.

Tongue & Groove Design

PolySteel forms have a tongue and groove edge design allowing forms to move against neighbouring forms easily in infinite increments. The tongue is easily cleaned of any concrete spillage before the next layer is placed, something which is more difficult with castellated edges.

U Value and Air Tightness:

A basic finished PolySteel wall (including PolySteel form, concrete, internal plasterboard, external rendering) achieves a U value of around 0.279.

At this U value, the wall produces air tightness results of less than three air changes per hour usually achieved. This enhanced air-tight performance makes the inside of a PolySteel building almost draught free.