The robust heating wire systems are suitable to protect driveways, car parks, pathways, steps, loading ramps and bridges. When used in conjunction with intelligent thermostats they provide an energy efficient and fully automated heating system. Heated Driveway System’s Scandinavian designed Ice & Snow melting systems can be used beneath virtually any surface to ensure it remains free from dangerous ice and snow build-up. Custom made ice and snow melting thermostats monitor both the ground temperature and the moisture level to ensure that they only operate when they are really needed. The thermostats are fully programmable and can be set up for the specific local conditions as required. In addition to ensuring that driveways and walkways remain free of dangerous ice and snow build-up the heating systems also prevent the need to use salt to keep areas clear, minimising costs and also ensuring both the road surface and the surrounding environment are not damaged or contaminated by salt build-up.
Why install a HDS driveway de-icing system?
For most ramps, driveways and walkways the entire area would be heated to provide a uniform heat. In some circumstances, such as long driveways or where the power supply is restricted, it can be preferable to heat targeted areas. The most common example of this is to heat two tyre tracks on a ramp or driveway, or to heat a specific proportion of a pedestrian walkway.
Where a long driveway requires heating it is quite acceptable to simply heat two tyre tracks, leaving other areas unheated. This saves on the power requirements, and installation and running costs, and it allows longer driveways to be heated than would otherwise be possible.
When heating a driveway or path area, it is vital to ensure that the water can safely run away and does not become pooled to then refreeze. When heating a driveway area, we recommend that trace heating cables are installed into the drainage channels to ensure complete clearance
Hot asphalt can be poured directly on top of these cables which offers a huge advantage over conventional systems. The base layer that the cables are going to be placed onto should be firm, level and should not contain any sharp elements which could damage the cable. A flexible wire mesh should be placed in 1.2m strips across the area to be heated, with 2m between each strip. The cables can then be cable-tied onto the mesh at the appropriate spacing. The coldtail connection and coldtail lead are not designed to come into direct contact with hot asphalt so these should be covered with tile adhesive, cement or cold asphalt ahead of covering the main area. A minimum depth of 50mm of hot asphalt should be poured on top of the system and this can be compacted with a light roller if required. If a resin finish is desired this can be laid once the asphalt has cooled.
Care must be taken not to drop any paving slabs onto the cable during installation as these could damage the heating system. The normal method of installation would be to level the current surface and lay a 60mm layer of sand/grit then compact this as required. A flexible 1.2m wide wire mesh is then laid on top, with 2m between each run, and the heating cables are cable tied in place. A further 40-50mm layer of sand/grit is then laid on top of the cables and this layer is compacted by hand to ensure no damage. Block paving can then be laid; to achieve the greatest benefit from the heating system, blocks should be no more than 80mm thick.
Heating cables are often installed into concrete bases as concrete is particularly prone to damage from rock salt and freeze/thaw activity. The standard installation method would be to level the existing base and place a reinforcement fabric or rebar grid onto this layer. The grid should be raised at least 10mm above the base layer to allow total encapsulation of the cable by the concrete. The cables should be cable-tied in place on the grid at the appropriate spacing. There is no need to provide any additional protection to the coldtail connection or coldtail itself. The concrete can now be poured and it should form a layer with a minimum depth of 50mm; the concrete mix must not include sharp aggregate as this could damage the cables.