Maps and GPS directions to Jewson Amersham and other Jewson stores in the United Kingdom. Find your nearest Jewson stores. Jewson is the UK's leading supplier of timber and building products to the trade and general DIY public. Jewson also has specialist landscaping, joinery, tool hire, kitchen and bathroom centres, providing the best quality materials and products the builder needs to get the job done fast. Jewson is part of the Saint-Gobain Building Distribution Group, Europe's number one building materials distributor.