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Surface prepartions for ULFCAR® floors


Possible substrates
All horizontal substrates, such as concrete and other cementated systems, asphalt, tiles, formkeeping substrates in wood or steel.

Preparation of the substrate
The substrate must be free of dust, liquids, oil and grease. Heavily polluted substrates should first be cleaned with high pressure water.
If the substrate isn't cleaned well enough, or if it isn't cleaned at all, there will be no or very little bounding between the ULFCAR® primers and the substrate.


New concrete and other cementated systems
Sawcut and bevel or sawcut twice along gutters and wells in order to have a good and water proof bond between the gutter and the Ulfcar® floor. (see also detailed drawings).
The preparation of the substrate (dust free shot blasting, scarifying or acid etching) must be done very thoroughly in order to achieve a better adhesion to the substrate.
Agreement about the inclination of the surface and the tolerance of the surface level is necessary before the work is started. The inclination is created directly in the substrate with a tolerance of 3 mm under a steel bar of 3 m. Ulfcar® floors does not correct the inclination but will follow the surface structure of the substrate.
Sawcuts in the substrate must be filled with a jointing compound.
The maximum relative humidity of the substrate is 5%. This humidity can be determined by CM-test. The substrate must have sufficient pay load capacity to meet the expected pay load.

Existing concrete and other cementated systems
All detoiched/loose parts must be removed until a solid, hard substrate is left. Sawcut and bevel or sawcut twice along gutters and wells in order to have a good and water proof bond between the gutter or well and the Ulfcar® floor. (see also detailed drawings) Sawcut and bevel or sawcut twice if the Ulfcar® floor ends at an existing floor. (see also detailed drawings). The preparation of the substrate (dust free shot blasting, scarifying or acid etching) must be done very thoroughly in order to achieve a better adhesion to the substrate. The maximum relative humidity of the substrate is 5 %. This humidity can be determined by a CM-test.

Existing tile floors
Remove all loose/detached tiles until a solid, hard substrate is left.
Sawcut and/or cut away along gutters and wells in order to have a good and waterproof bond between the substrate and the Ulfcar® floor. (see also detailed drawings).
Sawcut and/or cut if the Ulfcar® floor ends at an existing floor. (see also detailed drawings).
The preparation of the substrate (dust free shot blasting, scarifying or acid etching) must be done very thoroughly in order to achieve a better adhesion to the substrate.

Asphalt
If the asphalt is rough enough, good cleaning is sufficient. If the asphalt is not rough enough to achieve a good adhesion, shot blasting should be done if possible. Soft and cold asphalt can not be prepared sufficiently. Cracks in the floor are to be 7 tion for floors expected when large temperature differences and/or thermoshocks occur.

Wooden substrates
Boarded floors need to be spanned with a 18 mm waterproof limed plate, screwed on a 25 x 25 cm screen. Apply a flexible membrane. When wooden constructions (joists and plates) are used, the thickness of the plate depends on the span. Different plates are bonded following the toothgroove principle.

Steel Floors
Shot blasting if possible. Immediately after the shot blasting, apply a special steel-primer in order to prevent corrosion. The primer is slightly sanded.

Remarks
A correct preparation of the substrate is needed to obtain a good application of the Ulfcar® floor. The inclination of the surface and the tolerance of the surface level will not be changed by the application of the Ulfcar® floor. An indination of at least 2 % is recommended for waterdraining. Gutters and wells should be at the same level as the substrate. The substrate must be dry (max. humidity 5%) The substrate is supposed to be correctly defended from upcoming water (by a damp proof membrane for instance), osmosis or any other liquids. Damage caused by these liquids (debonding of the floor, changing of colors by dampdiffusion, . ..) is not to be seen as a mistake from installation. Former chemical, physical, thermal and rolling loads of the substrate have to be known by the applicator in order to be able to prepare the substrate in a proper way. Not informing the applicator about these loads can lead to unsufficient or wrong preparation. Expansion joints may not be covered by the substrate and they are to be made beforehand.

The finishing of the gutters can take place in 3 different ways:

  1. Sawcut and/or cut away, or sawcut twice along the gutters. 
  2. Finish the floor at the gutters, sawcut afterwards and create a joint between the gutter and the floor. 
  3. Place a L-profile along the gutter and finish the floor up to this profile. (see detailed drawings). 
    Between the gutter and the profile, an elastic lute is applied.

Waterinfiltration along the gutter can occur when one of the first two systems is used.

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