Heating cables in concrete floors
Concrete floors are very suitable for electric underfloor heating. The power requirement varies with the type of room to be heated. Normally, heating cables are installed in the lower part of a 30-50 mm thick layer of screed (concrete), atop thermal isolation with high insulation properties. It is always advisable to install insulation under the concrete floor, so as to avoid heat loss downwards.
In renovation projects or when, for other reasons, it is necessary to keep the building height of the floor at a minimum, special low profile screeds, which provide a thickness down to 10-15 mm, are used.
Pouring of concrete/screed
In all types of concrete floors, it is important with good mixing, proper mixing ratio (follow the vendor’s user manual carefully), and good compacting of the screed so as to avoid air pockets and to ensure that the screeds thermal conductivity is as good as possible.
Screeds of concrete shall dry and cure naturally, and the heating cable can be connected and carefully put to use after 6-8 weeks (normally).
NB! It is advised not to use so-called fast-drying screeds. This is very dry type of screed, and will easily assume a porous structure with a lot of air inside. If this type of screed is still required, it is very important with good mixing, using an electrical mixer, and thorough compacting. Especially approved low profile systems require very short curing and drying. Consult the manufacturers installation instructions.
TKXP/2R / TXLP/2R NORDIC / MILLIMAT®
TKXP / 2R and TXLP / 2R NORDIC is a flexible and installer-friendly heating cable that is ideal for heating in concrete floors, both traditional and low profile floors.
MILLIMAT® is designed for embedding, which provides comfortable, safe and economical heating. It can be installed under resilient flooring, tiles, hardwood, laminate, etc. The product consists of a twin conductor heating cable unit, attached to a thin self-adhesive flexible fiberglass net.
MILLIMAT/100 is intended for rooms like kitchen, hallways, living rooms, etc., and may be installed on any surface (including combustible surfaces).
MILLIMAT/150 is suitable for bathrooms, WC or other rooms with higher power requirements, and shall only be installed on non-combustible surfaces.
It is a prerequisite in all cases that the subfloor is leveled and stable. It is often a requirement that the screed be min. 20 mm to achieve self-sustaining strength.
MILLIMAT® is designed in accordance with international standards and directives, with the production being quality assured according to ISO 9001 and environmental secured according to ISO 14001. MILLIMAT® comes with a 20 years product warranty, assuming proper installation and use.
In renovation projects or when, for other reasons, it is necessary to keep the building height of the floor at a minimum, special low profile screeds, which provide a thickness down to 10-15 mm are used.