Tip 1: How to make insulation with polyurethane foam

Tip 1: How to make insulation with polyurethane foam

To insulate your own home, the owners canchoose from a variety of ways, depending on your own taste and the state of your wallet. One of the most common methods of warming the walls of a residential house is the spraying of a special composition called polyurethane foam.

How to make insulation with polyurethane foam

Apply for insulation polyurethane foam in privatebuildings were not so long ago. The material has a lot of good performance - it's a small thermal conductivity, and excellent adhesion to the surface, and the filling of cracks regardless of their size, as well as mobility - in its original form, polyurethane foam is a foam. During transportation, it takes up very little space, which reduces the cost of shipping.

Polyurethane foam, or PPU, is applied to the surfaceby spraying. This technology allows you to create a single layer of thermal insulation without a single seam, which firmly connects with the wall or other prepared for insulation surfaces. It will not be necessary to tinker with the installation, as happens when choosing plates, there will be no need for measurements or cutting.

The technology of the process is that inA high pressure sprayer is supplied in a strictly defined proportion of two components. Under the influence of compressed air they are mixed and in the form of an aerosol are thrown to the surface. The mixture is applied in a thin layer, not foaming. A second or two after application, a chemical reaction begins, which causes a significant increase in the foam layer. After a while, the foam begins to harden, and a continuous layer of thermal insulation is formed on the surface.

PPU mixtures can have different density - choosethe desired composition follows, depending on which surface is to be insulated. For example, for the insulation of ceilings and walls, a material with a density of 40-50 kg / m3 is used.

But this material has a significant minus- for its spraying you will need to purchase equipment that is not cheap. You can also rent it or invite specialists for the work.

Tip 2: Warming with polyurethane foam: advantages and disadvantages

Penopolyurethane - found its application asheater in the sixties, then it was used in cold rooms. But polyurethane foam heaters (PPU) were used more widely in the late nineties. There are a number of opinions about this material, someone claims that it is a wonderful insulation, and someone on the contrary, rejects the very possibility of its use in residential and even office buildings.

Warming with polyurethane foam: advantages and disadvantages

Pros and Cons of Polyurethane Heaters

It is believed that polyurethane foam is a combustible material. Yes, it does burn, but just like all polymer materials for insulation. Absolutely do not burn only basalt fiber and expanded clay and then under certain conditions. Also PPU burns only with direct exposure to the flame. In addition, modern PPU have fire retardants and therefore are self-extinguishing.
The active use of PPU became possible not onlythanks to its thermal insulation properties, but also the convenience of use. Foamed liquid insulation easily penetrates into the far corners of roofs, pipes, deformed surfaces.
Polyurethane foam is toxic. However, only wood and stone can be considered as ecologically sound, and not treated with chemicals. Most of the plastic items emit harmful substances for the body and nature. Therefore, the norms of the maximum permissible concentration of harmful substances in the air are used. New books, for example, highlight the lead contained in the paint, the cladding of a new car is a complex toxin, and there are many such examples in everyday life. By the way, foam foam separates residual gases for only three days, after which it becomes practically safe. A test was carried out, as a result of which it was found out that mineral wool retained about 18% of moisture. Penoizol absorbs 13-14%, and high density polyurethane retains only 1-2% of water. From this it can be concluded that the thermal insulation of PPU is rather hygroscopic. The insulated house will not freeze and will not be affected by a fungus or mold. However, it should be remembered that the PPU should have a sufficiently high strength, otherwise this effect will not work.

Timely care for the heater - a guarantee of durability

The polyurethane foam is destroyed by about 1 mm peryear. But if it is covered with oil or water-based paint, the insulation will last for another 30 years. If the surface is well degreased and dried, the polyurethane foam sticks to almost everything, it allows it to be applied even on inclined surfaces, which is very convenient and practical.
Unlike many heaters, PPU can be used both outside buildings and inside them. Polyurethane foam is treated even the walls of cars and bottoms of small boats.
So, if you follow the rules of operation anduse a high-quality, dense polyurethane foam heater, and also to select a qualified specialist for this work, the heater will last for many years and without harm to health.