Weatherstrong Timber Garden Buildings Direct Garden Rooms Summerhouses and Garden Office UK Weatherstrong offer a complete Garden Buildings design service plus FREE delivery* and All of our buildings are solid wood construction (unlike many of our competitors who use inferior materials such as chipboard or OSB board), and double nailed and fully treated All buildings are manufactured to a high standard using quality materials and workmanship and come with a twelve month warranty against faulty materials or workmanship provided the building has been erected by our own fitters, plus a five year warranty against rot provided the building is maintained and retreated annually