DURISOL PERMANENT FORMWORK SYSTEM
View the certificate: 10/4784
In a market where ‘eco-friendly’ and ‘energy efficiency’ drives product development decisions and spend, when it came to building product credibility for an alternative solution to construction blocks, Durisol recognised the need to get back to the drawing board. Striving to create a product range that is energy efficient, simple to use, fast to construct and cost effective, the Durisol wall form units made of woodcrete (a mixture of wood paste and cement) aimed to fill that gap. Their permanent formwork system, assessed by the BBA, was designed to create a form of fossilised wood, as strong as conventional blockwork but with the thermal efficiency of timber.
The Product: The Durisol Permanent Formwork System comprises a range of woodchip-aggregate hollow block units with crosswebs, for laying in a stretcher bond with dry joints to form a wall construction. Mineral wool or PIR inserts are inserted into the unit hollows, with the remaining void to be filled with concrete. The webs vary in thickness between 38 mm and 90 mm depending on unit type. The concrete forms vertical columns connected horizontally with concrete between the unit webs to form a grid pattern. Vertical and horizontal steel reinforcement is introduced into the voids, for structural purposes, as required by the building design. The units interlock at the sides and are a flush fit at the top and bottom.