roof insulation foam building technology is known since then as the market there was such a product as a polystyrene (trade name Styrofoam). For over 50 years this method of insulation of the roof does not lose its relevance, because the technology is simple and accessible, and the raw material has several advantages compared with other materials.
The choice of material
Depending on the composition of raw materials used for producing the foam, as well as on the production technology, the material can be classified as follows:
- Polyurethane. Completed based on polyurethane consisting mainly of inert gas. A distinctive characteristic - a high density.
- PVC. Hard material yacheichny thermoplastic polymer which contains up to 56% bound chlorine that provides a product low flammability.
- Phenol-formaldehyde. Constructed on the basis of phenol-formaldehyde resins. The product was characterized by high thermal stability and resistance to solutions of alkali metal salts of weak acids and alkalis.
- Carbamide-formaldehyde. Melkoyacheichnuyu having a structure without large bubbles. A distinguishing characteristic is the low teplopropusknaya ability and resistance to microorganisms and rodents.
- Polystyrene. Gas-filled foams with high thermal conductivity characteristics and water resistance.
All types of polystyrene suitable for roof insulation, as the main criterion for material selection is its thermal conductivity, resistance to changes in temperature and water resistance. All of the above types of product have the technical characteristics of material suitable for use as a heater.
Advantages and disadvantages
As a foam insulation has a number of advantages compared to the same destination materials. The following list shows just some of them:
- Easy installation. Handling and stacking of sheets does not require special knowledge and skills of the builder. To carry out the installation of the material under the force of each. Professional tool is not required.
- Resistance to processes of self-destruction. Foam poorly to rot, which significantly improves its operational period.
- Low weight. In addition to ease of installation low weight material makes it possible to produce roof insulation without worsening the design.
- Low thermal conductivity. Among all the existing insulation foam is characterized by the lowest teplopropusknoy ability. The temperature of the sheet remains stable even with a + mark at ambient temperature up to 60 C.
- Dimensionally stable. During the service period, the material retains its shape and size as the warming layer protects from the appearance of backlashes.
- Sound-proof characteristics. Material characterized by high levels of noise reduction level. It can be used for the purpose of sound insulation premises.
- Environmental cleanliness. Despite the fact that the vapors are toxic feedstock, as the final product does not harm the material, and relates to a class of environmentally friendly materials.
The disadvantages of the heater can be attributed to vapor permeability and flammability. Before the roof insulation foam is necessary to take care of the ventilation system.
roof insulation technology
The process of laying insulation can be divided into several stages, the first of which is to prepare the roof to conduct work.
Preparing the roof
The process consists in careful removal of moisture from the entire surface of the roof battens and on the whole. It is desirable to dry the wood hairdryer construction to avoid condensation in consequence.
Related Content - technology polystyrene roof insulation.
Laying gidrobarer
From special film installation directly depends on the life of the roof. Gidrobarer must protect the insulation layer from penetration of moisture inside. Foam from exposure to water will not be affected. The risk exists for wooden structures, which are subject to the processes of decay and destruction.
Installation of the film produced on logs horizontally from the eaves to the ridge top to bottom. Required presence overlaps between the film strips. Fixing material should be implemented using staples or nails.
installation of thermal insulation
Building roof insulation foam inside design is carried out by fastening the sheets of material to the sheathing between the rafters. For a good coupling of the two surfaces along with special dowels made use glue. Chances education gaps between the sheets of insulation and joists. They must be eliminated by applying a foam or sealant. If this is not done, the apertures serve as the cause condensation inside the insulation, which ultimately reduce the insulation and lead to rot elements of the roof structure.
Technology external insulation of flat roofs
Flat roof unlike roof slope can be insulated from the outside. To this end, the foundation of roofing material is carefully cleaned and dried, it is a preparatory stage of work on warming.
The second stage is the laying of waterproofing material. In the case of a flat roof, this process is much simpler: the spread fairly evenly throughout the film to warm the surface, carefully secure it in the joints.
Next is laying insulation. It needs to be spread out evenly around the perimeter of the roof and fix dowels or glue. From the density of packing it depends on the quality of insulation. It is necessary to avoid the appearance of gaps between the plates. In the formation of such better to eliminate them using foam or sealant.
To increase the wear resistance of the design layer is laid on top of the vapor barrier insulator material, then poured bulk material surface of the roof. The final step is for insulation concrete screed.
Inner insulation of flat roofs
On the question whether it is possible to insulate the flat roof foam inside the best answer will be description of the technology consisting of three stages:
- preparation of the surface of the roof;
- assembling the insulating layer;
- fixing heater.
Preparatory work involves thorough cleaning and drying of the surface of the roof. When the flat roof insulation quality of this procedure affects the degree of strength of attachment of foam: detail treated surface provides sufficient coupling materials.
Gidrobarer installation procedure does not differ from the technology used in roof insulation angled. It can perform with your own hands.
Fixing the heat-insulating layer as in the case of a sloping roof, it is carried out by gluing and dowels. However, we must note that the installation of the ceiling finishing layer load on the layer of insulation will increase, so you need to fix it very carefully. The ideal option would be a decorative finish ceiling pendant mounting structure. Thus it is better to strengthen the roof frame using the reference profile installation.
Thermal insulation of the roof with his hands
On the question of whether their own hands to warm the roof from inside the foam, the answer is clear: The procedure to carry out every interested person. In this case, the main thing - to make accurate measurements. The perfect turn insulation, which is expected to further the development of the roof project. Then we can calculate the distance between joists so that when installing the insulation boards had no backlashes and gaps between the wood and foam. Pre-planned project on warming can save on the costs of the sealant.
Wizard errors or what not to do
In order not to disrupt the construction technology of roof insulation foam should be avoided laying deformed plates. When the sheet was damaged at the time of fastening, it is necessary to replace the whole. The presence of cracks in the insulation material will lead to the penetration of moisture and cold. This is detrimental to the wooden structural elements.
It is advisable not to use the material, the width of which does not correspond to the distance between the beams of the roof, as this is the cause of the formation of holes and gives tightness layer. In order to avoid leakage gaps must be treated with sealant.
As a layer of insulating moisture better to use a special material such as flashing. Using conventional film will not be able to fully protect the structure from moisture penetration. The same applies to water vapor retarder layer, it is better to use a vapor barrier membrane. Compliance with the assembly will extend the life of the roof. The minimum term of service in the foam as insulation is 15 years.