Long-lasting waterproofing for basement floors

Self-levelling waterproofing for basement floors in old buildings

Remmers WP Flow

The subsequent waterproofing of floor surfaces in basements of old buildings is carried out with the self-levelling, mineral floor self-levelling compound. The self-levelling, mineral waterproofing compound is applied to the load-bearing floor slab. WP Flow perfectly complements the Remmers interior waterproofing systems in a perfect way. Like the systems for walls, WP Flow has been tested and approved against water loads from the back in accordance with WTA data sheet 4–6, Subsequent Waterproofing of Structural Elements in Contact with the Ground, with a layer thickness of 10 mm.

In the transition area between wall and floor, WP Flow can be perfectly applied to the tried and tested Remmers systems. The quality and dimensioning of the floor slab must be suitable for the expected impact.

The floor waterproofing product Remmers WP Flow is effective against back facing water class

 - W1-E ground moisture and

 - W2.1-E pressing water < 3 m – moderate impact – in accordance with DIN 18533

“Waterproofing of elements in contact with soil”.

With floor coatings that are open to water vapour diffusion it is possible to rework the surface after only a short standing time. The perfect fast solution:

 - Priming with Epoxy BS 2000

 - Sealing with Epoxy BS 3000 SG

Check out the Product:

Remmers WP Flow

Example of basement renovation:

Self-levelling waterproofing for basement floors in old buildings

0B: Preliminary work (optional item)

Completely remove screed.

1: Substrate pre-treatment at the wall connection

Completely remove old render from the surfaces being renovated. Scrape out damaged joints to a depth of approx. 2 cm.

2: Substrate pre-treatment at the floor base connection

Use a suitable tool to chase out a dovetail-shaped groove (approx. 4 x 4 cm) at the wall/floor base connection.

Chisel open joints with horizontal masonry barrier sheeting to a depth of approx. 2 cm and cut back the masonry barrier sheeting.

3: Substrate preparation at the floor surface

Clean the mineral surfaces that are to be waterproofed. Remove any layers that could impair adhesion, any cement paste, dust, mortar residue or seams mechanically, e.g. by sanding, blasting or grinding. Vacuum surfaces thoroughly.

The substrate must be stable and dust-free.

4: Priming the floor/wall connection

Prime the mineral substrate at the floor/wall connection using the solvent-free, strengthening silicification concentrate Remmers Kiesol, diluted 1:1 with water. Do not let puddles form. Apply primer generously to the prepared substrate. Pre-wet highly absorbent substrates with water.

Application rate:

approx. 0.1–0.3 kg/m² Remmers Kiesol.

5: Bonding layer with fast-setting MWS

Create a bonding layer using the mineral, fast-setting, highly sulphate-resistant waterproofing slurry Remmers WP Sulfatex rapid. Mix the material to produce a slurry consistency and apply a single layer to the primer, wet-on-wet, using a slurry brush.

Application rate:

approx. 1.6 kg/m²/mm layer thickness as slurry with Remmers WP Sulfatex rapid

6: Bonding layer with fast-setting MWS

Use the mineral, fast-setting, highly sulphate-resistant sealing mortar Remmers WP Sulfatex rapid to seal the groove at the floor/wall connection, the barrier layer, open joints and any missing or broken-out areas > 5 mm. Mix Remmers WP Sulfatex rapid to obtain a filler consistency and apply to the fresh bonding layer using a suitable tool.

Application rate:

approx. 1.7 kg/m²/mm layer thickness as sealing filler with Remmers WP Sulfatex rapid

7: Producing a sealing cove with fast-setting sealing mortar

Produce a sealing cove in all internal corners with a radius of approx. 4–6 cm using the mineral, fast-setting, highly sulphate-resistant sealing mortar Remmers WP Sulfatex rapid. Mix Remmers WP Sulfatex rapid to obtain a filler consistency, apply “wet-on-wet” to the bonding layer, and form the rounded profile using the sealing cove trowel.

Application rate:

approx. 1.7 kg/m sealing cove with Remmers WP Sulfatex rapid

8: Waterproofing floor/wall connection with rapid waterproofing slurry

Create a waterproofing layer using the fast-setting, mineral, highly sulphate-resistant waterproofing slurry Remmers WP Sulfatex rapid. Apply at least 2 layers of the mixed Remmers WP Sulfatex rapid using the slurry brush. Minimum dry layer thickness > 3 mm. The planner must define the height of the waterproofing level, but the minimum dimensions are as follows:

Wall connection area: > 15 cm

Floor connection area: > 15 cm

Application rate:

approx. 4.8 kg/m² for a 3 mm layer thickness with Remmers WP Sulfatex rapid

8B: Fixing insulating edge strips (optional item)

Fix self-adhesive insulating edge strips with fleece backing to the wall connection area and to rising components.

Application rate:

approx. 1.05 m/m

9: Priming the floor surface

Prime the cleaned and prepared, absorbent, mineral surfaces using a water-based strengthening and hydro- phobic deep primer Remmers Primer Hydro HF. Apply the

product to the surface using a suitable tool and work in carefully. Puddle formation must be avoided. On highly absorbent substrates, repeat the process if necessary.

Application rate:

dependent on the substrate approx. 0.1–0.2 ltr./m² Remmers Primer Hydro HF

10: Waterproofing and levelling with self-flowing floor levelling compound

Once the primer has dried, level the surface with the water- impermeable, mineral, self-flowing floor levelling compound Remmers WP Flow. Layer thickness: 5–30 mm

With water load on the reverse side, minimum layer thickness > 10 mm. Pour the mixed material from one side, spread quickly with a trowel, roll with a spiked roller.

Application rate:

approx. 1.7 kg/mm/m² Remmers WP Flow