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Dry, floating and light screed Placosol® consists of 2 glued plasterboards generally implemented on a layer of Placoforme granules® to rehabilitate any bearing soil (concrete screed, slab, tile or floor) degraded or collapsed.
Formula perfectly dry (no use of water), this light screed makes it possible to put directly a tiling, a carpet or a parquet floor.

Lay a dry Placosol® screed

Necessary material

  • Set of three metal rules, two serve as guidance, the third in the draw of pellets
  • Blue to draw, meter, pencil, cutter
  • Level, platter, serrated rubber squeegee
  • Knife to coat

Plots and soil preparation

Plots and soil preparation

1. Find the unevenness of the floor by moving a long metal ruler on which the level is set. With the ruler level, place the highest point on the wall at the base of a wall. Add at least 2 centimeters, this is the minimum thickness of the layer of Placoforme granules®.

Lay a dry Placosol® screed: screed

2. On the four walls of the room, record a horizontal line about 1 m above the floor. Cut a peg whose length is equal to the distance between the line on the wall and the highest point of the ground raised by 2 cm. Trace down the second line, parallel to the first one, it will indicate the level of the soil after spreading of the granules.

Lay a dry Placosol® screed: floor

3. On an old floor, recap holes and slots (larger than 3 mm) with MAP adhesive mortar® Formula Plus to prevent pellet leakage.
If there is a risk of rising damp, unroll and staple polyethylene strips on the floor and at the bottom of the walls, taking care that they overlap widely.

Implementation of granules and laying of plates

Implementation of granules and laying of plates

1. For the implementation of Placoforme granules®, start at the opposite sides of the exit of the room, after dismantling the doors. Use 3 level rules (2 guiding and 1 pulling). Make 2 embankments of granules up to the level drawn on the wall and put on the guiding rules, in a parallel way.
Then pour the granules to fill the space between the two embankments and, with the draw rule, even out the material at the mark.

Lay a dry Placosol® screed: placosol

2. Make a temporary path with plates to walk on the freshly laid granules and start laying the first layer of Placosol®. The first row of Placosol plates® is placed 5 mm from the bottom of the walls. The face marked Placosol® must be oriented towards the granules. To start the second row, use a half-plate to offset the joints by at least 20 centimeters between the rows.

Lay a dry Placosol® screed: screed

3. Place the plates edge-to-edge on the glue layer and staple them (or screw in) as the first layer is added with 26 mm staples or 35 mm screws. It is necessary to provide 8 fastening points per plate, evenly distributed. 7College with Placostic® the first layer of slabs (meshed with a serrated rubber squeegee). Then lay perpendicular to avoid overlapping joints, the second layer of Placosol plates® but by showing the mark (treated layer on top) and respecting an offset of about 20 cm. Always leave a 5 mm gap on the periphery.

Lay a dry Placosol® screed: floor

4. Place the plates edge-to-edge on the glue layer and staple them (or screw in) as you add the first layer with 26mm staples or 35mm screws. It is necessary to provide 8 fixing points per plate, uniformly distributed.

Lay a dry Placosol® screed: granules

5. Finish with the soft seal at the periphery and around the bypassed obstacles, using a flexible cartridge sealant. It avoids the water to penetrate under the plates and to any particle of granules Placoforme® to go up. Avoid walking on the dry Placosol screed® for about 12 hours, while the Placostic glue® hardens. The floor is ready to receive tiles, carpets, plastic or floating floors...


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