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