Natural structural insulated panels
Developments in modern and off-site construction methods have led to the production of structural panel systems. These are panels of wall, floor and roof cassettes which are fabricated in controlled factory conditions then delivered to site for erection. Approximately 70% of all new housing in Scotland is now delivered in this way. The benefits of this system are in the controlled fabrication process conducted off-site and the speedy construction time on-site that have brought improvements to efficiency of the build process, quality of construction and energy performance of the finished build through improved air tightness.
The most common Structural Insulated Panel [SIP] or closed panel systems use polyurethane or polystyrene insulation at their core. Both materials are derived from petrochemicals which have been linked to toxic off-gassing and will have a negative impact on the environment after the lifespan of the building.
MAKAR has developed their own closed panel system which differs from panels produced by most other manufacturers through the intergration of locally grown timber and natural insulation materials. MAKAR use cellulose and sheeps' wool insulation as an alternative means of achiving good energy performance. Insulation in MAKAR's closed panel is sealed between the interior and exterior surfaces of the cassette whilst in factory conditions ensuring that insulation material is not exposed to moisture on site. The panel can also be pre-plumbed and wired before arriving on site to further accelerate the construction process.
A MAKAR house can typically be constructed on site in 3-4 days using MAKAR's structural panel system. This reduces costs associated with wet trades such as brick laying which are slower to perform, release more carbon and may be significantly delayed by poor weather conditions.