Fasteners for aerated block / foam block. Fasteners that can withstand loads over 500 kg.

Now many people build houses from aerated concrete blocks, foam blocks. It is a lightweight material with a porous structure. The cells in the gas block increase the thermal insulation properties.

However, then many ask themselves the question: how to fix objects on the walls: a picture, a TV, a Swedish wall, shelves, a water heater, stretched ceiling strips, etc.

Lightweight objects can be attached to the walls with screws, nails (at an angle). But such fasteners will not be secure enough to hold. Over time, it will become loose. Sometimes the screws just break off inside the gas block.

Aerated concrete is a brittle material. Therefore, it is not recommended to use a hammer drill. From such a load, the gas block will crack. Drill with a screwdriver at low speeds, a hand drill with special. punch.

Fasteners for foam-gas block

There are spiral nails with a twisted surface that are screwed into aerated concrete without breaking its structure.

Various dowels are used for the foam block and aerated block. It can be a dowel-nail, a front dowel, nylon (for a light shelf, pictures), frame.

There is a metal expansion plug with 4 petals. You don't even need to drill a hole. All you need is a hammer and dowel. Withstand up to 5 kg.

Once I saw such a "picture" in an old house. Although the house was made of bricks, it was still interesting. The screw was screwed into the hole and "sat" there thoroughly. I was able to remove it on more than one attempt. The hole itself in the wall was about 1 cm. A screw with a diameter of 5 mm. The point was that the screw seemed to be wrapped around a two-core wire.

First, the wire was inserted into the hole, and then a screw is wrapped in it. It turns out an excellent dowel. It does not swell or dry out and holds the fasteners well.

There is one way that allows you not to use special fasteners for aerated concrete. Drill a hole. Then blow everything out of the hole with a vacuum cleaner or some other method. There should be no dust. Take foam glue for aerated concrete.

Fill the hole with foam and insert the dowel. We are waiting for the glue-foam to solidify, and then we screw in the self-tapping screw. The load can withstand up to 60 kg.

There is a dowel for sale Thermofix specially for aerated concrete. A hole is drilled. You don't even need to blow out the dust. The dowel tip is heated with a lighter (about 20 sec.). The composition on it becomes soft and sticky. Then it is hammered into the hole. The manufacturer assures that such a dowel can withstand up to 90 kg. (tested on a D500 gas block).

It must be remembered that no dowel in foam concrete, aerated concrete can withstand significant weight.

The most secure mount

Therefore, for reliability, a chemical anchor is always used. It is needed when it is necessary to fix an element that has a lot of weight (for example, heavy water heaters). Frozen chemical. the anchor can withstand a load of up to 800 kg.

Sometimes it is necessary to wait up to 48 hours for the complete solidification of the solution. A chemical anchor (175 ml.) Costs about 300-400 rubles.