The avance is a top selling value summerhouse the attractive joinery quality glazed doors and large canopy make for an attractive addition in any garden it is constructed on 34mm square framing and clad with planed shiplap tongue and groove boards made only from the highest grade fsc slow grown northern european pine the summerhouse is supplied with a dip treated base coat preservative ready for top coating to the customers choice immediately on installation to ensure your safety the do