Most stable overlay system for all types of floor heating Heat-Pak Dual Overlay must NOT be used in bathrooms, wet rooms, en-suites or any other wet areas as they will expand upon contact with moisture. If installing carpet or vinyl in any of these areas, you must use an underfloor heating mat with self-levelling compound. Please speak to technical for further details. This system is required for both our Underwood and Under Carpet/Vinyl kits. Heat-Pak is a free floating sub-floor specially designed for installation over all types of floor heating systems. This innovative system provides a very smooth, stable base onto which all kinds of floor-coverings can be laid directly. The twin layers of Heat-Pak panels utilise an overlap joint configuration to produce a seamless surface and prevent lines from ghosting through shiny floor finishes. Heat-Pak creates the ideal sub-floor for carpet, linoleum, vinyl and cork etc. Heat-Pak is very simple to install and much quicker and easier to use than a traditional smoothing compound. It is also an entirely dry process so it is much cleaner and requires no setting time which allows the flooring to be laid immediately. Heat-Pak makes the installation of electric cable, mat, foil or film systems far easier than using the wet screed method. Only small amounts of adhesive tape are required to hold the elements in position until the Heat-Pak panels are laid on top ensuring that the entire heating system remains permanently flat and safely protected underneath the finished floor. The very low thermal resistance of Heat-Pak enables your valuable heat energy to pass quickly and easily through to the surface for a fast warm up time and maximum comfort. Heat-Pak also provides for the inclusion of a suitable insulation layer below electric systems for optimum efficiency. Heat-Pak is composed of high quality MDF and the 3mm baseboards and 4mm topboards are each coated with a special interactive contact adhesive to give a strong, permanent full-surface bond. Strict quality controls during production guarantee excellent results and a trouble-free installation every time. Overlay for all kinds of floor heating Very low heat-resistance (Rm value of only 0,047) Very stable, floating sub-floor Perfectly smooth surface for carpet, linoleum and cork Dry, dust-free installation Easy and quick to fit