Working with our partners in the UK, Silva Timber Products, Sansin Wood Sealer was selected for Leven Valley Primary School, located in the Lake District National Park, which is surrounded by beautiful woodland so the building had to use natural materials that blended into the landscape.
We’re sharing below a case study posted on Silva Timber Products’ blog.
The main concern for the school was the lack of insulation in the building. New double-glazed windows and sheep’s wool were used to insulate the building. An additional layer of insulation came from the Western Red Cedar ‘board-on-board’ style siding. Wood in general has low thermal conductivity, but the low density of cedar makes it one of the best thermal insulators of any wood species.
Western Red Cedar was chosen as the siding material, not only because of its beautiful natural appearance, but also its proven ability to perform in damp environments. As the Lake District experiences more rainfall than any other part of England, this was an important consideration.
Leven Valley Primary School wanted to let the cedar age naturally to a silver grey but understood the importance of protecting the wood from moisture. It was decided to protect the cedar siding with Sansin Wood Sealer, which was factory applied by Silva Timber prior to delivery.
Sansin Wood Sealer is a water-borne penetrating sealer with very low volatile organic compounds (VOCs) that works by repelling water while allowing the wood to breathe. Wood protected with Sansin Wood Sealer doesn’t hold excess moisture, so it is far less prone to water staining, mold and algae growth and turning black. Wood Sealer allows the wood to weather gradually to a consistent silver grey color.
Sansin Wood Sealer contains only 10 grams per litre of VOCs (the EU regulatory limit is 130 grams per litre), making it one of the most eco-friendly wood protection products on the market. VOCs contribute to atmospheric pollution, so using products like this helps create a healthier environment.
An inspection 12 months after installation showed that the Western Red Cedar siding and Sansin Wood Sealer were performing perfectly together. In an area with high rainfall and large trees surrounding the building creating a damp environment, there were no water stains, black marks or mold growth and the cladding is mellowing steadily to a pleasing silver grey color.