Board Calculator Calculate = Add to Basket config = { calculator: 'board-cal', label: 'boards', coverage: 0.72, //simples: simpleqtys, //simple Trig: $j ('.super-attribute-select') }; board Cal.init (config); Budget Backer Boards are ideal for two primary purposes; as a superior waterproof surface to fix wall or floor tiles & as a first class heat insulation for underfloor heating systems. Budget backer boards are particularly suited to underfloor & under tile heating applications. Installation below underfloor heating systems on an existing un-insulated concrete or timber sub-floor will greatly reduce heat up time & running costs. When installing onto concrete sub floor we recommend using our flexible tile adhesive, when installing onto wooden floors we recommend using tile adhesive and/or screws & washers. Budget backer boards are waterproof & dimensionally stable (unlike plywood) Ideal for wetrooms Easy to carry, no more shifting huge sheets of plywood around Excellent sound