Warmed Finnish Foundation: With their own hands

Along with the popular on FORUMHOUSE foundation UWB (insulated Swedish stove) the interest of users is another type of energy-efficient foundation. This - UFPh, insulated Finnish foundation representing warmed strip foundation with floors on the ground. That's about it and will be discussed in today's material.

Comparison of UWB and warmed Finnish foundation

First UFPh want to build those developers who are thinking how to neutralize a number of shortcomings (both imaginary and real), inherent in UWB. This is a low plinth. Here it is largely affected by the Russian mentality, and a fear that the low plate and standing on her house in winter snow sweep up. As shown by extensive practice UWB users using our portal, this characteristic of the foundation is not particularly affect the ease of operation.

The second indicator - the high cost of UWB devices in areas with a large height difference. It affects a large amount of preparatory earthworks. And the third factor - the high cost of UWB, and more specifically, the need to put up a large sum for a range of activities related to the construction of this type of foundation.

UWB - is a real system consisting of the foundation of the body, drainage, warmed blind area and all necessary utilities: floor heating, electrical cables and mortgages under the water pipes, the system drain. A plate surface is ready for laying the finishing coat.

Besides all of the above, UWB requires high culture construction works of artists, it is not always possible in relation to our conditions. Hence: for many private developers UFPh more understandable, less complex to implement, and allows you to stretch the work on time.

UFPh may eventually prove to be more expensive than UWB, the possibility of "installment" to pay for the whole cycle of works, as well as the usual high base or the possibility of a foundation on uneven area outweigh.

In classical form UFPh represents precast strip foundation, composed of 3 - 4 rows HEC (hollow or lightweight aggregate concrete blocks corpulent) (200h200h400 mm). The cross section of the tape - 600 - 800 (height) x 200 (width) mm. Each row of blocks reinforced with two steel rods "tens".

Finnish stove, foundation. An important detail: the tape from HEC built on a monolithic reinforced concrete "heel" size - 600 (width) x 200 (thickness) mm.

Foundation insulated inside extruded polystyrene foam, after which the perimeter is filled with sand, sand compacted, laid all the necessary utilities. Then poured concrete screed with the pipes, as a variant, floor heating.

Those. arranged the classic and well-known user of our portal on the ground floor. UFPh Also, to reduce the cost and accelerate the construction, it is possible to build without the use of classic wooden formwork.

This is done as follows: digs a trench (in fact, can only be removed fertile layer), it vtrambovyvayut rubble line the polyethylene film, the outer edges of which plant for HEC.

Blocks are bumpers for pouring the concrete foundation, and also act as a removable formwork. After pouring the "heel" and pour concrete blocks removed and used for laying the tape.

As this is done, clearly demonstrate the following photos, taken from the theme of "Finnish Feng Shui St. Pete" portal user with the nickname Tim1313.

Also interesting is the option of building UFPh using corpulent peskotsementnyh blocks that are used Dmitr173, who decided on their own to repeat the Finnish foundation.

Budget option Finnish insulated foundation

Dmitr173 (Member FORUMHOUSE):

Explore our portal and read the topics with examples of building users, I literally inspired to their own constructed karkasnika in the CHT. Karkasnik I decided to put on size UFPh 10h6.5 m, as I think this type of foundation for optimal suburban soils. As an asset of the foundation will record a high base. UWB for seasonal living, I would not do at home.

To optimize the work of the user has decided to bring to the construction worker. Under control Dmitr173 workers cleared the building spot, and for marking, dug a trench depth of 50 cm.

The geometry of the trench was controlled using a tape measure and a laser level.

Once dug trench, its Shots geotextile, covered gravel, which is compacted homemade wooden tamper.

Dmitr173:

Altogether, according to my calculations, on filling took 7 cubic meters of gravel. Gravel asleep and rammed myself. All materials are expected to multiply machines in order to minimize costs. The site already lived, and to store blocks and gravel nowhere.

Then, on the gravel bed laid steklogidroizol. It is necessary to separate the gravel from the concrete "heel."

The walls of the trench, as well as the bottom Shots thick polyethylene film and put reinforcement cage.

After the preparatory work Dmitr173, all carefully calculated, ordered a mixer with the concrete. Total spent on the base 3.9 m³ of concrete B35.

the question arose at the zero cycle, a material used for laying the tape. The user has decided to use the full-bodied peskotsementnye blocks. This unit has dimensions 39h19h19 cm. Weight - about 27 kg. Frost resistance is F50. Durability - M150.

Finns are used for the construction UFPh HECs with voids, as believe that a lightweight frame house strength of the claydite-concrete block enough. These blocks are "warmer" than full-bodied concrete, lighter, and easier to stack them physically working.

Dmitr173:

Spin the heavy blocks in hand, I realized that with the volume of work he could not do it. I decided to hire workers.

Blocks laid in three rows. Each row reinforced. First, the user planned prodolbit punch with groove for the valve (in the Finnish version of the foundation in the HEC has a groove), but I thought this idea was abandoned. Reinforcement between the blocks were placed in the solution.

Not without minor problems. As workers have tried to put audio blocks horizon drop reached about 3-4 cm. Eventually Dmitr173I decided to withdraw at the top of the blocks 0, using the CPU (cement-sand mixture). Junction blocks to the "heel" waterproofed with two layers of weld steklogidroizola.

Finished construction of the foundation, the user has started its insulation (inside) extrusion polystyrene foam in a single layer.

Plates were fixed with plastic plugs with pressure caps.

After completing this step, made backfill the perimeter of soil excavated when digging a trench for the foundation.

Backfill should not do the excavated soil with organic inclusions and sand.

Dmitr173:

Filling fulfilled itself. The thing is a chore. I want to quickly go from earthworks to the finish.

Having filled the inner perimeter of the foundation soil, the user drew on the compacted surface of the wall and again checked the layout of the future house.

Making sure that the project is carried out correctly, Dmitr173 spaced trenches for laying and installation of sewer pipes.

It was required that the tube passed under the foundation pad, and must comply with a certain bias.

For sewer pipe of 110 mm in diameter deviation is 2 cm to 1 meter. Total: path length for a 10 must perform a smooth decrease in the trench (between the entrance and exit points) in a 20 cm.

At the laying of non-recoverable communications should focus. Our portal has in detail told, how to mount the utilities under the slab types of foundationsIncluding UWB.

An interesting option of Dmitr173, which, in turn, took the advice of friends plumbing. So:

1. Sewer pipes are joined with each other using a special paste - lubricants intended for connecting plastic pipes. The use of a paste simplifies the connection and extends the service life of the sealing rubbers.

2. Further pipes connected with each other by small screws, so-called «Ê». Moreover, the two self-tapping screws are screwed in the following way. If we imagine that sink (black water) flows to the "6" hours, the screws are screwed to "10" and "2" hours.

3. The inside of the pipe screw should stick to minimum. Too much is cut and trimmed.

4. Joints of sewer pipes, for better sealing, further wrapped with aluminum tape.

5. Pipes are dressed in a foamed heat insulation material, so-called "Coat". Outputs pipes through the body of future boards, also dress in insulation. This design would unleash and provide certain mobility pipes. In the case of leakage drains, both on the sleeve, will flow through a heater outside the foundation.

6. Tubes are placed on compacted sand base of the trench, and then also backfilled with sand rammer.

Dmitr173:

The depth of the trench turned out 0.6 m. The work is significantly complicated by the rains. The walls of the trench collapses. While dig again, have brought the level podsyplesh, if necessary sand. It took time.

When you have finished laying sewer pipe, and filled with sand, poured on a user base of gravel.

Gravel or crushed stone needed for douplotneniya sand. When compacting crushed rock (especially coarse fraction 20-40 and higher) due to the hardness provides additional load on the ground. The result is a deeper sand seal. Moreover, not only inside, but also to the sides.

Then Dmitr173 geotextiles spread (it is necessary to separate layers) and ordering sand, began his pilfering.

At this stage again needed the help of hired workers. The main thing - to look after them and supervise the work. Because, at the user's words, "professional" believed that the difference in the Delta level sand base in the 4-7 cm is - normal, and you can align the curvature of the concrete screed.

I had Dmitr173 explain to the workers how to do everything.

After the sand were separated and stamped, dug two trenches - the future ribs rigidity under transverse load-bearing walls.

At the bottom of the trenches laid Epps and proceeded to the layout of the base layer insulation.

Work on the device floor screed on the ground consisted of several steps:

1. Cross-laid layer of extruded polystyrene lay a polyethylene film.

2. Laid a metal grid, which was put on the spacer so that it was in the "body" of the plate and joined in the work.

3. 5 m³ of concrete was poured.

That's what happened in the end.

Dmitr173:

I'm happy with the result. I got a flat and rigid base, ready for final finishing. Gender does not bend. He insulated. I got rid of a problem with the air holes and underground ventilation. Do not worry, will disappear or not wood, as is the case with wooden beams.

Total for the construction of the foundation of the user spent 220 thousand. rubles (the house he is building near Moscow). At the end of the article say about the common misconception. Many novice developers think that if there is no ekstraarmirovaniya, and not filled with a monolithic tape or plate freezing depth of 30 - 40 cm thick, and the fragile foundations. Common practice - to build a normal country cottage excessive and expensive foundation on which, in the end, you can put a multi-storey residential building, is incorrect.

That's right: use proven technology for decades, forward under the weight of the concrete foundation of the building and the bearing capacity of soil. Especially because under the frame - a relatively light house, is not required to build a strong foundation.

The topic on FORUMHOUSE recounts how to replicate the Finnish foundation and not go broke. Also we advise to study the theme of construction of a frame house on UFPh near St. Petersburg.

Of our articles, you'll learn Whether in need plinth produhiand how to make your own hands on the ground floor.

And in the video shown basic nuances of the construction of a UWB.

Discuss the article and read other materials devoted to country life you can on the websiteFORUMHOUSE.

Subscribe to the channel so as not to miss the next release!