The foam (or expanded polystyrene) is used in the repair of a decoration. Due to physical and chemical properties of the insulation it is very easy to spoil. So you should carefully approach the choice of substances that affect the material.
Foam - this is one of the most popular materials used in the repair and siding - external facing of walls. There are different types of insulation differing structure and density, which depend on the elasticity and thermal insulating properties of the material.
Popular type of insulation premises - izolon because it has a good thermal insulation. Working with him is quite simple when you consider some of the properties of insulation. For high-quality results you need to choose carefully glue, tools and equipment to comply with foam.
Brief instructions how to glue the foam:
- Prepare material and tools.
- Align and clean the surface prior to attachment material.
- If it is necessary to glue the foam between them, it is enough to wipe dust from the sheet. When attaching the sheet to the other materials to be processed: cleaned of dirt, smooth the surface with plaster, lay a reinforcing mesh.
Apply adhesive on one of the sheets. First, glue is applied along the contour of insulation, followed by the entire surface of stripes or dots. Some formulations are expanded when dry - it should be considered and, if necessary in advance to pave the reinforcing mesh sheets.
- Fast and accurate press sheet to the surface.
It is desirable to press down the sheet heater for a few minutes for a better bonding. If the material is laid on a flat surface, can be put on top of a small load.
How glue can glue the foam?
To attach the foam to a sheet of the same foam using different adhesive masses. When selecting an adhesive must be studied carefully its composition, because some components of the mixtures can ruin the material.
Clay powder
Dry mixes - one of the budget options that have good bonding quality. When choosing such a powder, you need to carefully examine the packaging and make sure that they can work with polystyrene foam. Typically, for such mixtures include:
- Glue for foam - suitable for all kinds of polystyrene.
- Adhesive for facade work, this option is universal, because with the help of the facade structure it is possible to attach the insulation to almost any kind of surface. However, this adhesive is stored for long - about 6 months from the date of issue.
Mounting Foam
Due to its physical properties, thermal insulation sheets are attached foam "for centuries". However, we must take into account the expansion of the mounting property of the masses, if necessary, use a reinforcing mesh. Also, when working with the foam should have on hand a special solvent to clean the cylinder tube through which the extruded mounting structure.
polyurethane Adhesive
Reliable adhesive composition suitable for bonding together a variety of materials. Less of it is that it is sold in bottles, and to work will have to buy a special tool.
Liquid Nails
Suitable for bonding of almost all kinds of materials to work with glue bottle just enough. But over time, the glued material can come off, so for greater reliability liquid nails is best used in conjunction with any other adhesive composition.
consumption of glue
When choosing an adhesive mixture need to calculate the area of the treated surface and the flow of materials:
- Flow of dry adhesive foam is 3 kg per 1 sq. m.
- One cylinder of foam volume 0.85 liter. enough for 15 - 18 square meters. m.
- The balloon polyurethane composition volume of 0.75 liters. designed for 10 - 13 sq. m.
The cost of these types of solutions can vary greatly. Dry adhesive mixtures - the cheapest option, if the treated area is relatively small. If you need to insulate the area of 100 square meters. m., require 300 kg of powdered glue. Polyurethane compositions or installation - more expensive. But when a large area of processing them requires much less than the adhesive powder.
What is the glue can not be used for the foam?
Some components of the composition different adhesives destroy the structure of the insulation.
When buying a mixture or solution you need to pay attention to the composition, in which there should be:
- solvent (e.g., acetone);
- alcohol;
- substances derived from gas and oil.
If the acquired adhesive on the package that does not specify the composition, it is possible to check availability. You need to apply a little mixture on a small piece of foam and wait for about 30 minutes. If the material was not damaged, there is no trace of a hardened, this adhesive composition is suitable for use with insulation.
The glue foam to other materials?
Some types of glue intended bonding insulation sheets together, are not suitable for other materials. Therefore, when choosing the composition must be considered particularly surfaces to which are attached sheets of insulation.
- Concrete. While insulating walls of the house under the foam siding is attached directly to the concrete. The most versatile option for such adhesive insulation - or PVA foam.
- Metal. For fixing styrofoam to-metal fit liquid nails, PU glue PVA. Also, a good result is when using double-sided tape, when pasted over a small area.
- The cloth. Wrapping tissue surfaces commonly used aerosol or liquid-purpose adhesive and nails.
- Glass. Best embodiment for bonding polystyrene to glass epoxy is universal or spray adhesive.
- Paper. To improve the thermal insulation of the wall areas of the house are often insulated from the inside, followed by repair. It is important to remember that pokleit wallpaper can not be on top of the foam. It is necessary to close the insulation plasterboard. A conventional approach for wallpaper wallpaper adhesive composition.
- Wood. For bonding wood surfaces with insulation or plywood used polyurethane glue or instant liquid and nails.
As a self-adhesive foam do?
For bonding between the foam sheets are well suited PVA glue, which can be done at home. The same adhesive is suitable for fixing of insulation to the surfaces of other materials. PVA is a universal adhesive mixture is often used to repair, for example, wallpapering.
Ingredients for PVA:
- 1 liter of pure water;
- 20 - 25 ml of ethyl alcohol;
- 4 - 5 grams of glycerol;
- 5 - 6 grams of photographic gelatin;
- 100 grams of sifted flour.
Step by step instructions for the preparation of the PVA.
- Soak gelatin in a little water and leave for a day.
- Swollen gelatin put on a steam bath to dissolve. Slowly add water and flour. Stir.
- Over medium heat to maintain weight, until the liquid has thickened to the consistency of thick cream. All the while stirring the mixture, so that no lumps.
- When the contents of the pan reaches the desired consistency, turn off the oven and leave to cool.
- The chilled mixture was added ethyl alcohol and glycerol. Stir to dissolve all lumps.
- Cool the mix and ready to use.
