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Floor, Standard Design, Code G2

Tile floor on cement mortar, sliding layer of plastic sheet


The G2 floor with a waterproof membrane is appropriate for floors requiring a waterproof seal, where temperature and moisture variations occur and there is a risk of considerable deformation in the sub-floor.
The G2 floor without a waterproof membrane can be used for floors where a waterproof seal is not required but where temperature variations occur and there is a risk of considerable deformation in the sub-floor.


Typical cross-section.


Cross-section through wall with straight skirting tile.


Cross-section through wall with cove skirting tile.


Section through floor drain.


Reinforced expansion joint.

kanał podłogowy

Gutter with ceramic lining.

  1. Sub-floor
  2. Waterproof membrane
  3. Sliding layer
  4. Bedding mortar
  5. Cement slurry
  6. Tiles
  7. Expansion joint
  8. Joints
  9. Skirting tiles
  10. Edge reinforcement
  11. Reinforcing rod
  12. Floor drain
  13. Bevelled tiles
  14. Sealing compound
  15. Floor grating
  16. Reinforcement
1. Sub-floor
The foundation should be even enough so as not to impede the movement of the floor lining.

2. Waterproof membrane (if necessary)
See the architect's specifications.

3. Sliding layer
A single sheet of 0,1 mm plastic.

4. Bedding mortar
The bedding mortar must be at least 40 mm thick. The next table indicates appropriate thicknesses as well as requirements for reinforcement.

Floating floor on foundation of:Bedding mortar thickness, mm
for following wheel loads, kp
  Min. track
distance 800 mm
A. Concrete + sliding layer
1 sheet 0,1 mm plastic
B. Waterproof membrane +
sliding layer of 1 sheet
C. Foam or cork sheet +
sliding layer of plastic
with or w/o waterproof

k= edge reinforcement as in figure, above.
a= reinforcement rod Ø 4,2 mm ‡‡ 150 mm in lower edge.

Bedding mortar for floors in conventional buildings should have and average crushing strength of at least 15 MPa. Mortar in floors in industrial facilities and/or where traffic load exceeds 600 kp per wheel should have a crushing strength of at least 20 MPa. Crushing strength recommendations refer to tests of finished floors after 28 days of use.
The mortar should be carefully compacted to ensure maximum strength. The surfaces of industrial floors should be vibrated or treated mechanically by other appropriate techniques.
Bedding mortar with a thickness exceeding 50 mm should be applied in two layers, each of which should be compacted. The second layer should be applied immediately after the first one has been compacted.
Special care should be taken to ensure an even surface and well-filled joints in floors that are exposed to traffic with small, hard wheels. Floors exposed to heavy traffic (wheel pressures exceeding 600 kp) should have reinforcement joints across the direction of traffic and in the door openings. These floors should include bevelled tiles and steel profile reinforcement.
Aggregate for bedding mortar with a thickness of 40-50 mm should correspond as closely as possible to the upper grading curve in the diagram below. Aggregate for thicker bedding should correspond to the lower grading curve. Aggregate should meet maximum requirements for cleannes.


An appropriate mix for bedding mortar consists of 1 part Portland cement to 4 parts aggregate, by weight. The mix can be determined by volume in a rigid container after checking the weights of the materials together with the container. The appropriate water-cement ration is 0,38. Appropriate consistency is 8 VEBE (b). The actual water content of the aggregate should be taken into account.

5. Cement slurry
Cement and water should be mixed to a fluid consistency.

6. Tiles
Ceramic tiles with a thickness of 10-25 mm should be used. Tile quality should be selected with respect to the type and intesity of stress.

7. Expansion joints
Joint width: 10-15 mm. Jointing compound: CC Höganäs Habenit 50. Joint thickness should equal tile thickness. The joint should be based on cellular plastic (or similar material) flush with the bottom of the tile. Expansion joints should be made so as to form squares of 40-80 m2 in area.
The floor lining should be separated by expansion joints from walls, columns, foundations, drains, wells and pipe entry holes. The squares should be arranged so as to avoid excessively complex geometric figures and should be as quadratic as possible. The sides of the squares should be not less than 3 metres and not more than 12 metres long.
In floors exposed to heavy traffic, these squares should be large, with a minimum of joints across the direction of traffic.
Expansion joints should follow the ridges on the floor and should normally not cross drains.

8. Joints
Joint width:5-7 mm. Cement-based grout CC Höganäs FB 20 (grey), FB 21 (brown) or FB 23 (dark grey). Jointing compound for floors exposed to chemicals should be selected in consultation with our Building Materials Dept.

9. Skirting tiles
Cove skirting tiles or straight wall or floor tiles may be used.

10. Reinforcement profiles
Steel L-profiles should be used. Profile height should be somewhat greater than mortar thickness. Note: overlaps in the waterpoof membrane may lead to variations in the thickness of the bedding mortar. Reinforcement should be installed to a distance of at least 0,5 m on either side of traffic lanes. Door openings should be reinforced with steel profiles up to the surface of the floor.

11. Renforcement rods
Ø=8 mm, length 250 mm and c/c 250 mm. The rods should be welded to the L-profiles.

12. Floor drains
Floor drains should be fitted with spacer rings.

13. Bevelled tiles
Use CC Höganäs nos. 507 or 508 for floors consisting of the tile no. 500. Use bevelled tiles nos. 507 GK or 508 GK with floor tiles no. 500 GK.

14. Sealing compound
CC Höganäs jointing compound - Habenit 50.

15. Floor grating

16. Reinforcement rods
Ø=8 mm.

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