Glass Reinforced Plastic (GRP) The Leka Roof frame made up of rafters, a ring beam and ridge is made from glass reinforced plastic. GRP is a composite with tensile strength greater or equal to steel. Yet it will never corrodes or rot. Nor will it shrink or crack. It's the perfect choice for a roof which is why we chose it. Other materials cannot beat it.

Internal Leka Boards We call them 'Leka boards' because we established the benefit for the Leka roof purpose. These are fitted beneath the GRP rafters. They are one third the weight of standard plasterboard, more thermally efficient and 100% waterproof. As well reverse degradable, they can be returned to use and plastering may be supplied. Depending on your chosen system energy value, alternative boarding may be supplied.

Insulation Sheets We tested a number of insulation sheets before choosing a small number of brands. In our opinion, these are the best insulation products on the market. The sheets are fitted within a 15mm gap from the Leka boards to create a warm air pocket. This provides high value thermal efficiency. Each sheet is perfectly cut for your roof. Alternative materials can be supplied, dependent on required energy values.

External Leka Boards Next, our structurally tested, thermally efficient external Leka sheets are installed onto the rafters, covering up the construction beneath. The outer sheets are lightweight, strong and highly weather resistant. They are 100% waterproof, impermeable to moisture and one third lighter than wooden alternatives. This makes them truly superior.