Knumerics Design – Narrowboat & Widebeam Interiors We design functional and decorative furniture for narrowboats and widebeams. From bulkheads to portholes, if you are planning a new interior for your boat, we can make it for you. Made to order and constructed from marine grade 18mm birch ply, oak or another material of your choice, … Continue reading Knumerics Design – Narrowboat & Widebeam Interiors