For insulation of facades often used plates of polystyrene foam or in another way – penoplex. This is a high-quality material that allows you to save the accumulated heat in the room and significantly improve the energy efficiency of the house. Quite relevant is the question: how to glue such plates, and how to choose an adhesive for expanded polystyrene for outdoor use.
Among the huge number of existing adhesives, you must choose one that would meet the following requirements:
- provides good adhesion to any surface;
- resistant to temperature and other atmospheric differences;
- easy to use and does not drip;
- does not contain toxic, toxic substances.
Helpful advice! During the work with expanded polystyrene it is impossible to use the mixes having aggressive solvents in structure. They destroy the material.
Adhesive for expanded polystyrene for outdoor use: variations
The adhesive mixture can be produced in different forms. This may be special formulations that must be diluted independently or ready-made solutions. Glue for penoplex should not contain potent solvents, such as acetone, gasoline. Such compounds can dissolve the insulation, burning through them big holes. Also they should not be:
- drying oils;
- diethyl ether;
Such adhesive compositions consist of a special light solvent, which does not affect the polystyrene foam, the plasticizer and the bitumen itself. Such mixtures are quite popular, they are sold fully prepared in small buckets, which greatly facilitates their use.
Before applying the bituminous adhesive, the surface of the walls must be thoroughly dried, sanded and primed. On the basis should not remain dust, dirt, rust and other stains. For applying the composition using a special comb spatula. With it, a thin continuous layer of wavy lines laid on the wall, then glue the plate. The adhesion of polystyrene foam to the surface occurs in the first 20 minutes, so during this period additional fixation with supports or some kind of load is required.
This adhesive is resistant to gasoline, various oils, acids, ultraviolet radiation. It provides additional insulation from moisture throughout the insulation system.
Such a composition can be used both inside and outside the room. Cement-polymer adhesive for polystyrene foam for outdoor use is ideal for laying foam concrete on concrete, cinder block or brick walls. Glue of this type quite strongly adheres polystyrene plates, but requires a fairly deep priming of any surface. They are sold mainly in the form of dry powder, which requires dilution according to the attached instructions.
Various polymers have been added to the Portland cement in the mixture, which allows the finished glue to be quite flexible and convenient for application. The resulting solutions are resistant to high humidity, low temperatures and do not collapse over time.
This type of adhesive composition is radically different from the above. It is sold in cylinders and is used as regular mounting foam. Polyurethane adhesive for polystyrene for outdoor use has high adhesive properties, and also has a number of other important advantages:
- easy to use;
- dries quickly;
- has an economical consumption;
- not exposed to various weather disasters;
- does not spread;
- possesses high frost resistance.
The quality of bonding penoplex when using foam-adhesive for polystyrene for outdoor use much higher. There is no need for constant monitoring of the correctness of the preparation of the composition, as well as compliance with the recommended proportions. This adhesive mixture does not need mixing. Full strength is gained in about 2 hours, while bitumen and cement mortars require at least 6. One cylinder of such glue replaces more than 25 kg of dry mix.
Clay foam does not require continuous application, which is why it is economical. Apply it directly on a polystyrene foam plate around the edge around the perimeter and at several additional points for a stronger grip. Application is also required at the joints in order to fix the foam sheets to each other.
Helpful advice! Glue-foam should be applied with a special construction pistol. With its help you can glue the gaps between the plates.
Before buying the selected foam polystyrene adhesive for outdoor use, in order to determine its quantity, it is necessary to calculate the future consumption of the composition. Exact figures can not be calculated, of course, since they can depend on the wall material, its absorbency, but approximate data can be obtained by checking the instructions from the manufacturer.
The average consumption of various compositions:
|Dry mixes||500 gr. / m?|
|Bituminous formulations||800-1000 gr. / m?|
|Polyurethane adhesive foam||1 cylinder on 8-10 m?|
The quality of thermal insulation primarily depends on the health of the building and the people living in it. The choice of glue used in outdoor insulation is an important task. After reviewing the description of the main adhesive materials for polystyrene foam, as well as with the methods of their application, you can choose the ideal composition suitable for a specific surface.