How to fix polystyrene
Foams, including polystyrene foam, mineral wool to compete for the title of the best insulation. In its main characteristics - Thermal insulation - they are superior to mineral wool, but inferior to it by fire. Since retardant foams, it is desirable that they be insulated layers of non-combustible materials, such as plaster or brickwork. Expanded polystyrene, enclosed within a stone wall, is a perfect insulator.
You will need:
- polystyrene; - Primer; - Tile adhesive; - Ground strap; - An electric drill with a set of drill bits pobeditovye; - Mixing nozzle; - Belleville dowels; - Capacity for dilution and primer adhesive; - A set of construction tools (hammer, spatulas, rollers, etc.).
Instruction how to fix polystyrene
Polystyrene foam is attached to the base with glue and special fasteners - Belleville dowels (fungi) .Ochistite wall from sagging solution, dirt and dust. Prime with it that any suitable primer (for example, AC-5 polyomino). If the wall material has a high absorbency (slag concrete), prime with the wall twice. This will prevent the absorption of moisture from the adhesive base. Before proceeding, let time work the primer to dry.
For support of the lower row of plates attach to the walls of the ground strips - a C-shaped profile made of perforated metal. The lower edge of the strips must match the joint line of the cap to the wall. Fixing is carried out plugs in the amount of 3 pieces per 1 meter length of strap.
Stir adhesive (Polymin P-22, ceresit CT 85 and so forth.) At a specific amount of water with an electric mixer and nozzles. Some brands of adhesives require mixing with a break. Carry out this procedure in strict accordance with the instructions.
Apply glue to a sheet of polystyrene foam strip around the perimeter at a distance of 2-3 cm from the edge, leaving small gaps for the release of air from the central zone of the plate. In the center of the sheet adhesive is applied locally, the size of missed areas should be about 10 cm.
Starting from the bottom corner of the wall, install the plate with the long edge on the ground bar and firmly press it to the wall. Control the vertical surface plate level or plumb. When laying the second row provide a mismatch (overlapping) joints compared to the first row. Cutting boards made a long, sharp knife.
By installing several slabs, secure them with disc dowels, pre-drilling a hole so deep to anchor entered into the wall at least 50 mm. Plate dowels must be installed flush with the surface of the insulation. This can be achieved by striking a hammer with the required force on the plate dowels or slightly flattened surface of the plate in the zone of contact with nut before you install it.
Once the heater is attached to the entire wall, put on the surface of the adhesive layer width equal to the width of the reinforcing grid, level its wide spatula. On the edge of the insulation at the corners of the walls and window openings, apply perforated angle - to protect the edges of polystyrene foam from mechanical damage.
Apply a layer of adhesive on the reinforcing mesh, and roll it with a roller. On top of the grid and leveled with a spatula, apply another layer of glue. Once the entire wall will proarmirovana and missed glue, give it time to harden, then prime with the surface. After the primer has dried the surface of the wall will be ready for plastering.