Every garden room will require external cladding to complete the construction.

Future SIPS supplies a choice of four external cladding timbers for your DIY garden room project.

We offer Tanalised Redwood, Thermowood, Larch or Cedar cladding.



Tanalised Redwood is a popular timber frequently used for garden buildings. Durable and cost effective, Tanalised Redwood is our standard timber.


Thermowood is manufactured by heating premium quality Redwood to very high temperatures. Preservatives are injected into the wood to ensure durability and zero maintenance.


Western Red Cedar is a perfect choice for any Future Room and is a natural timber with a beautiful, aesthetic quality. It is naturally resistant to decay and will simply weather over time. Left untreated the Cedar will silver and weather into a beautiful natural finish.