Warming of the roof with polyurethane foam, prices for ppu -
The construction market does not lack the materials for thermal insulation of the roof. They vary in efficiency, cost, and installation methods. Among the products of this type, polyurethane foam (PUF) is notable, which is very popular among professional builders and home craftsmen. Due to the versatility of this material, it is successfully used for applying to all types of surfaces. In this article, we will describe how the roof insulation using PPU is performed and how much it costs.
Composition and types
Polyurethane foam is a special type of foamed plastic, which has a finely cellular structure filled with gas. Almost 98% of the volume of this material is a mixture of air and carbon dioxide, and the remaining 2% is hardened plastic. Due to this structure, PPU has a low thermal conductivity, low mass and low hygroscopicity. Roof insulation is performed using 2 types of materials:
- Elastic PUF. Elastic polyurethane foam is called seams or rolls of foam insulation based on plastic, the density of which does not exceed 20 kg per cubic meter. Due to the open structure of the cells, the air in them moves, and the material itself bends well and restores its original shape. The bulk of the elastic foam has a density of 8-15 kg / cu. m. With it, perform internal and external insulation of roof slopes. In addition, the elastic type polyurethane foam has a high noise insulation ability. To install this insulation on the slope, you just need to lay the strip of the required size between the rafter legs.
- Hard PUF. Rigid polyurethane foam is called insulation based on foamed plastic, the structure of which consists of closed cells of small volume. The composition of this material includes 2-3% solids, which, due to the structure of the material does not deform, is highly resistant to mechanical or chemical damage, weighs little. The density of the polyurethane foam of the hard type is 30-60 kg / cu. The price of thermal insulation work performed with this material depends on the thickness of the applied layer.
Roof insulation with polyurethane foam is cheaper than using thermally similar mineral materials for thermal insulation. The total price of work depends on the area of the slope and the thickness of the coating layer. Experienced roofers recommend spraying 50-100 mm of polyurethane foam, then the cost will be 550-600 rubles per square meter.
Mounting methods
PUF is considered the most versatile material that is used for waterproofing, sealing joints, insulation, noise insulation of roofing structures. Due to the variety of forms of release, it is applied in various ways suitable for buildings under construction and for reconstructed buildings. Warming polyurethane foam perform the following methods:
- Fill method In the course of this method of applying polyurethane foam fill the cavity between the rafters. Using a powerful pump, liquid insulation is pumped out of the tank, and then the ramp is poured. For better thermal insulation, application is carried out in several layers, gradually filling layers of small thickness, taking breaks for drying. If you immediately fill the entire volume of PU foam, it takes longer to harden and dry the insulating layer. The advantage of this method in the speed, simplicity and easy adjustment of the thickness of the insulation. During pouring polyurethane foam fills the smallest gaps and gaps, which allows this method to warm the roof of complex shape or geometry.
- Spraying method. This method differs from casting in that polyurethane is applied to the surface of the slope in a pre-foamed form. For this purpose, a special installation is used in which liquid PU foam is poured, where it mixes with air, foams, and then sprayed in the form of foam. Liquid polyurethane foam hardens in just 10 seconds, but it takes 1-2 days to fully dry. The price of this method is higher due to the use of special equipment, but the costs are justified by the efficiency and speed of installation.
Note! PPU - thermoinsulating material with unlimited service life. It will reliably serve 30-50 years. And if new gaps appear in the roofing structure, you can easily seal them with a new layer of insulation.
Benefits
The modern building materials market is famous for tough competition, therefore, strict requirements are imposed on roof insulation materials. The insulation used to isolate the stingray is affected by many negative factors - temperature drops, moisture, mold and fungus. However, PUF has the following characteristics, which bring this material to the leading positions among analogs:
- A light weight. PPU weighs less than most types of insulation, due to which it can be used for thermal insulation of old and dilapidated buildings without dismantling roof structures.
- Resistant to moisture, UV, chemicals and fungus. PUF retains high thermal insulation qualities despite the effect of precipitation, does not burn and has a service life of 30-50 years.
- Efficiency. Thermal insulation of the roof of the roof with the help of polyurethane foam reduces the cost of heating by 15-20%, which in the budget of an individual family results in significant savings.
- Low price. The cost of thermal insulation with polyurethane foam is less than with mineral wool or other modern heaters. And due to the fact that the installation does not require any additional structures, the cost of optimizing the temperature of the house even more reduced.
