Polypipe Overlay Floor allows floor heating to be installed in to existing spaces quickly, simply and practically. The unique system is a patented low profile panel, which is laid over existing solid or timber floors. Tiles and laminate can be laid directly onto the system. Carpet and vinyl require a capping layer of 4-6mm plywood. Overlay is perfect for kitchens, bathrooms or conservatories where wall space is available and total design freedom is required. This Polypipe Polyplumb is the polyurethane expanding foam glue suitable for use with the Overlay heating system.