General information
There is a lot of information you will need to know when designing an eco-friendly system for your project.
Screeded Floors
Screeded ground floors require a minimum screed thickness of 50mm, whilst 100mm is the thickest that we would recommend, whilst 65mm will provide the best mix of heat retention and output.
Temperatures
The following temperatures will be achieved providing the property insulation meets or exceeds current building regulations.
Main living areas - 21°C
Hallways, kitchens and bedrooms - 19°C
Bathrooms (with towel rail assistance) - 24°C
Insulation
Underfloor heating loops are set on foil backed foam insulation board. To ensure liquid screeds do not have a detrimental effect on the insulation boards we recommend the fitting of a membrane between the pipework and the foil face of the insulation boards.
Foil backed foam insulation board such as Kingspan or Celotex should be used above the main building slab and between joists for the underfloor heating pipework to sit on, we currently recommend a minimum of 60mm thickness on ground floor with 25mm for the upper floors.
Polystyrene insulation boards do not have sufficient insulation properties and should not be used as part of an underfloor heating system.
Lytag
Lytag pellets are a lightweight alternative to a 'PUG or Biscuit Mix'. The pellets are simply spread over the underfloor heating loops. The finished floor is then laid directly over the joists, or battens, for final fixing. On their site they can calculate how much Lytag you will need to cover the size of your house.
Wooden Floors
If you are intending to have a hardwood floor on any level it is
essential that any non-screeded floor has a PUG (a loose mixture of
sand and cement or Lytag) filling between the pipework and final floor to maximize heat distribution. We do not recommend that any timber, chipboard or MDF floor exceeds 25mm in overall thickness.
Conservatories
If your home has a conservatory or sun room, we will have added additional pipework to allow for the additional heat loss of such areas. Whilst we do not envisage a problem with heating such areas we are unable to guarantee temperatures in very cold weather.
Timber Frame
Many timber frame buildings have a fitted sub-floor to upper levels as part of the buildings construction, Chelmer underfloor heating is easily installed in these situations.
System Treatment
Chelmer Heating reccommend the use of some form of water treatment with our systems to prolong the life of the system and reduce the effects of limescale. We can supply electronic or chemical softners depending on user preference and the level of protection required.
Borehole Water
Water supplied from a bore hole will require treatment as some Ph levels will have a detrimental effect on equipment. Chelmer are
unable to accept any responsibility for damage caused that is a result
of using bore hole supplied water
Deliveries to Site
In general our prices include for two deliveries to a UK mainland site address, additional deliveries maybe chargeable.
Deposit
If our quotation is acceptable a 25% deposit will secure your order at
the quoted prices, orders for Boilers, Solar Panels, Air Source Heat Pumps and Thermostore Cylinders will require full payment with
order.