How to make effective floor heating on wooden joists

Warm floor - one of the most popular today, the heating method used both independently and in conjunction with other systems. stacking technology studied and perfected, but is preferably used on the first floors of the great weight of cement covering traditionally used for pouring line. To safely stow heated floors and hardwood floors, without fear that the foundation will "play", an original technology came up with the Finns. And to their needs and possibilities of its adapted users FORUMHOUSE. They are willing to share their experiences with everyone.

dry screed

Dry screed - the floor heating device of hardwood floors without grouting. In the conventional system, screed performs the functions of not only the lock, but the conductor - thanks to the high thermal conductivity effectively gives heat up. But due to the heavy weight of it can not be used on logs. According to Finnish technology in dry screed perform this function plasterboard in three layers - as a base between the loops of pipes as the completion of the "pie". Voids between the pipes and sheets smeared tile adhesive, the upper layer is attached to it.

Variations on a theme

In our country, on the basis of the Finnish technology that allows to abandon a monolithic casting, there were variations of it - the principle remains and materials were added:

• Gypsum sheets (GVL) - compared to gypsum denser, stronger to bending and deformation in the composition comprise cellulose fibers and other additives that improve their characteristics. For wet areas use water-resistant variety (GVLV)
• Chipboard, OSB (OSB), plywood - on heat transfer such a construction is obtained worse as wood and its derivatives act insulator. Sold complete sets of floor heating for dry screed of sheets of chipboard, with the selected slots for loop, but their value is not a master.
• Cement chipboard (DSP).
• Epps - pipes laid directly in the insulation and the voids obscure the adhesive. To improve the heat transfer are used foil or similar material.

The thickness of the sheet for the middle layer to the backbone is selected, based on the pipe diameter, so that after filling an adhesive to obtain a flat surface, and the final layer is pressed onto the pipe. Alternatively, a glue between the two sheets if the thickness is not enough.

Forum users are actively organize their floor heating systems for hardwood floors.

Serg177 (User FORUMHOUSE)

If something happens with the pipe (today, tomorrow or in 25 years), do not have to break the tie. I will be purchasing 200 m² plywood 50 sheets, 18 mm thick, dissolve it into strips in the gaps - the tube 16 mm and above - Ten sheets 200 close up and the laminate.

One embodiment of a dry screed - laying pipes in special aluminum plate with grooves. They are tight-fitting pipes and increase the heat. Minus this configuration - the high cost of these metal gaskets, their use increases the cost of the entire system.

Vladimir Tallinn (User FORUMHOUSE)

Lacks specialized aluminum sheets that are placed under the pipe and the output heat up. I stand, they "hug" pipe size of about 30 cm per meter, a groove for a pipe with a few thorns, so that the pipe was kept.

Sheets gypsum base - one of the most sought after, as the best in all respects material.

• Acceptable cost.
• It is easy to cut into segments.
• Environmentally friendly (do not contain synthetic binders as plates with woody fillers).
• Incombustible.

Installation

assembly algorithm floor heating on wooden joists on the basis of the Finnish technology - the standard, regardless of the materials used, whether the FCL, GVL (B) or other plates.

evraz (User FORUMHOUSE)

Similar technology where the pipe heating cable or smeared solution in grooves GOLS and covered with the topsheet GOLS painted many manufacturers of floor heating systems.

Warming

The system must give up heat, and not pass it to the overlap that will result in increased heating of the carrier and reduced efficiency. Fit between joists, steam, from the top - a layer of insulation (rockwool, Epps), hiding vapor barrier layer. Insulation protection and wood, and insulation against condensation, provided that it is not just a plastic film. Under ordinary film condensation will form in the still large quantities.

Base

The optimal distance between joists when mounted system - 60 cm in this case does not require the creation of additional batten for load balancing, and the sheets form a monolithic structure. To lag sheets are mounted on screws.

Highway

Meters and diameter of the pipe depends on the floor space, heat, power equipment used for heating the coolant. The most demanded range - 16-20 mm in diameter. Step pipe too is different in each case, but on average - 100 mm, the edges often. The pipe is attached with special metal or plastic clips or clamps homemade.

laying

The space between the tubes is filled segments cut from sheets around pipes must remain under filling the grooves with adhesive. The optimal slot size - 3 pipe diameters, it is sufficient for maximum heat removal. The segments are fastened with screws with a pitch of 10 - 15 cm, length of the fastener should be sufficient to lock in the joists.

filling

To fill slots most commonly used tile adhesive can be used cement-sand mixture, but when mixing necessary to use plasticizers. To improve adhesion and topcoat "pie" tightly joined with an intermediate, it is recommended after filling the joints with the tubes pass across the surface of the adhesive mixture "to tearing." This is a tip from a user under the nickname VitaonHe is professionally engaged in the installation of such systems, and shared with the forum users their cunning.

Vitaon (User FORUMHOUSE)

Before finishing layer surface consists of alternating strips of dry plasterboard and trenches filled with adhesive. Immediately before gluing, it is necessary as a filler, a broad spatula and a thin layer of adhesive to cover the entire surface - to obtain a homogeneous base. Following apply adhesive at finishing layer. With this method of adhesion is increased many times.

finishing the floor

For warm floor joists can be used for almost any decorative coating, it acts as a contraindication only cheap linoleum - it is a constant heat will be felt, "to smell." The best option - ceramic tile or laminate. In the case of a laminate substrate does not fit under it, due to the insulating properties.

Warm floor with dry screed on the Finnish technology - basic version, which can be adjusted to the specific conditions and needs. All the subtleties and nuances - in the subject line on the warm floor of plasterboard. article for heating private houses It selected the most economical way of heating. And in the video about engineering heating equipment - advices of the master of your choice.