Insulated slab foundation: instructions for construction

Users of our portal have accumulated vast experience in the construction of foundations. Starting from tape, piles, monolithic slabs and ending with popular type - UWBAnd are eager to share their knowledge with the novice developers. I was no exception Turkish945. User detail told about all stages of the construction of insulated slab foundation as a garage-workshop, boiler room, size 7500h7500 mm.

Turkish945 (Member FORUMHOUSE):

I've been analyzing what the foundation to choose. In the end, I stopped on the type of UWB. At first I thought to make a plate with stiffening ribs, then without ribs. But me worried one moment - whether stand plate in a thickness of 10 cm from a point load TA (heat storage). So I decided not to engage in independent action, and ordered the foundation of the project.

After the calculation it turned out that the thickness of the slab should be increased to 20 cm, otherwise there is no guarantee that it will withstand the expected load. Judging that the economy in the 30 th. rub. (The difference between the plate thickness of 100 mm and 200) is - undue risk, the user has stopped in the second embodiment of the foundation.

The foundation - a layer between the building and the grounds, which redistributes the load from the house to the ground. The foundation should be built not by sight, and not on the principle of "so did the neighbor", and design on the basis of data geological studies of the soil (it will find its bearing capacity) and further collection of all loads from the building.

Having defined the project of the foundation, the user has hired an excavator for digging the pit. All chosen and taken away about 50 cubic meters of soil. In addition, it was possible to negotiate with the excavator and at the same time to uproot bushes and trees on the site. For this work, we gave 15 thousand. rubles (in prices of Defense for 2015).

Accuracy heights at the bottom of the pit does not exceed 50 mm. Also Turkish945 I asked users of the portal, what to do with the grooves on the bottom of the pit, formed after the operation bucket: clean or compacted as it is, and then pour "cushion"?

Also conceived user via hired workers to dig a trench along the perimeter of the foundation (400x600 mm) under drainage. Then lay geotextile and to start compacting the sand cushion. unable to dig a trench, due to lack of laborers, ready to do the job.

Because Turkish945 from the beginning doubted the need for drainage, he decided to completely abandon it, saving 40 thousand. rub. Although this decision, the opinion of our users is very controversial, the work continued. On weekends, the user, with the help of a friend, had brought on a garden wheelbarrow from the pit full of loosened soil.

Turkish945:

When you look at the pit from the top, it seems that the soil loosened quite a bit, but for two people it is easy work. As a result, we will work 4 hours without a break, and very tired.

Here's what happened after the removal of soil.

Also unloaded simultaneously extruded polystyrene (19 cm 120h60h10 size packs for insulation boards and 2 mm for packs 1160h580h50 skirting board) which is brought to the site.

After finishing the preparatory stage, the user is spread on the bottom of the pit geotextiles and started to form a sand cushion. For this he needed a vibrating plate (Turkish945 I took it for rent), but the sand got a hitch.

Turkish945 I ordered sand from one "local" to the seller, who promised that he would bring eight cubic meters of clean sand for the price of 5 thousand. rub for Kamaz. As a result, the construction site brought sand with lots of stones and clay.

I had to manually sort through and throw out foreign inclusions. The work was delayed until the evening. Also, the user has agreed with two laborers, that on Sunday they will come to the laying of sand.

Because ordered enough sand, Turkish945, nekonditsiyu received a discount for the first truck, ordered from the same seller second machine and the third Kamaz sand just in case ordered from another vendor.

On Sunday morning it became clear that the laborers who were hired before, linger. To save the day, the user has started to work.

Turkish945:

I rammed sand vibratory plates weighing 85 kg. Total made 4 penetration. One tunneling took 30-40 minutes. Sand spilled water.

By this time, we arrived two trucks filled with sand. The first - with the sand from the seller had deceived the quality, but gave discount and solemnly promised that this will not happen again. The second truck - from a new supplier. Unloaded two piles next, Turkish945 saw that the sand again with clay. Additionally, a heap, which in volume, according to the first of the seller, to be 8 cubes, looks exactly like a bunch from a second vendor, but privozshego 6 cubes excellent sand.

The result: the first provider of a fully exhausted credibility and good-bye to him. Without waiting for the laborers, who promised had already come, the user alone with the father engaged in stripping the rest of the sand.

Rather tired, Turkish945 I decided to call again a laborer, and find out where they are. Having received the answer that they are already on the way, the work continued. As a result, "helpers" have arrived in the evening, and in ordinary clothes, and the question of how they are going to work in this way, they said, "we came just to see the work front."

Looking around, the guys with the move said the price of 1,000 rubles per 1 cubic rastaskannogo sand. It is about 30 thousand. rub. for two, 2 days work. Saying "goodbye", the developer refused their services.

After all the ordeals, Turkish945 found guys who quickly scattered and stamped the sand at the price of 1500 rubles. per person per day. Total spent on a sandy base 40 sand cubes. Turkish945

Sand up to the plate, we stamped state. To obtain a flat and solid base.

The next stage - marking trails for utilities. For the convenience of the user fashioned a simple device - "beacons", by driving in the caps of plastic bottles nail "weave."

"Tracker" is stuck in the sand, but for the head of a nail clings to ring roulette.

This allows you to mark the track without help.

Mark the road, dug trenches for utilities.

The main thing - to observe all the slopes under the sewers. 2 cm to 1 meter for a pipe of 110 mm in diameter and 3 cm 1 meter for a pipe diameter of 50 mm.

Pipes (under water and a heating) in the foundation body enter the liner - a tube of larger diameter. In this case, on 110 and 160 mm. Moreover, the input pipe intentionally made not at 90 and under 60 degrees. To do this, and have put together the two knee with an angle of 30 degrees.

Covered with sand and tamping his communication, the developer laid insulation offset plates.

The final version.

Now we go to the mating of the reinforcing cage. To speed up the work Turkish945 I ordered rebar already sawn on the necessary size.

Turkish945:

When I saw the amount of delivered fittings, I realized that I made the right decision. And the time saved and the tool sberog because I'm not sure that my "Bulgarian" would withstand such a volume of work.

For mating fittings have rented a special gun, despite skepticism from the portal users on this expensive equipment.

The most frequent complaints: the battery does not hold a bad knits, wire confused, but Turkish945 I was pleased with the gun. According to him, the wire was confused at the very beginning - the first 10 minutes of work, then, "filled his hand," he knitted gun without marriage.

As for the speed of work, binding the reinforcing cage in increments of 25 cm it took about one hour from the break. A coil of wire, valued at 120 rubles., Enough for about 170 knots.

Pursuing self-construction, to be ready for a variety of force majeure - a sharp change in weather conditions, etc. Arriving one day at the site to complete the binding of the reinforcing cage, the developer saw the following picture.

Because of the temperature reduction at night on the grass there was frost and dew formed inside the casing.

In the morning the thermometer showed only + 2 ° C, and the so-called "Winter" conditions concreting foundation - when daytime temperature does not exceed +5 ° C, and at night it falls below 0 ° C. Yield: use of special antifreeze additives. Nevertheless, Turkish945, ending the reinforcement plate, moved to the most important stage - pouring concrete.

Turkish945:

Concrete Volume I counted very carefully, because ordered mixture with a small margin (as recommended by pouring the foundation), I could not have nowhere to drain the excess. As a result, after several measurements of the thickness of the rim, and excluding the volume of the used fittings and sleeves, I have ordered 10.5 concrete cubes.

Concrete was brought to the two mixers.

In the first car 7 cubes, the rest in the second. Concrete dragging away via assistants, not forgetting provibrirovat mixture.

Concrete enough right on the calculation of the entire foundation.

At the end of the article we present the cost of the plate:

• the foundation of the project - 20390 rub .;
• earthworks - 15000 rub .;
• shipping costs (delivery) - 15600 rub .;
• wage laborers - 10500 rub .;
• Tool Rentals - 11000 rub .;
• concrete - 38500 rub .;
• Sand - 30000 rub .;
• fittings - 26810 rub .;
• Epps - 28615 rub .;
• utilities (pipes) - 11940 rub .;
• Other expenses - about 14,000 rubles.

Total: (approx) 222 452 rubles, or (roughly) - 4120 rubles. 1Q. m plates.

Learn more about insulated building slab foundation can be subject to FORUMHOUSE. Recommend that you read the article, which describes, how to calculate the formworkThat it is not rasporlo concrete when pouring, and whether it is necessary to do the foundation sand podsypku. And from a movie, you will learn the nuances of construction a new type of slab foundation "Box-cooker."

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

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