It is recommended to start with a focus reference slab in the centre of the soffit with subsequent slabs being fixed working towards each edge. The use of string lines or laser alignment equipment will assist in ensuring alignment and squareness of the installation.

Lay the insulation slabs in a staggered joint pattern. Refer to Illustration 2. It is recommended that the insulation slabs are tightly butted to minimise heat loss through insulation gaps, ensuring a professional finish is achieved.