Renovating salt-contaminated masonry with the weber basement renovation system

Cleaning the surface

1. Remove old and damp renders/plasters approximately 80 cm above the damaged area.

2. Masonry joints must be cleaned out to a depth of at least 20 mm.

Surface preparation

3. Chisel a recess measuring 4 x 4 cm in the internal angle between the concrete slab and the basement wall.

Drilling

4. Drill boreholes (∅ 16 mm) into one horizontal masonry joint row.

Preparation for injection

5. Prepare the manual gun weber.sys Nr. 3 and aluminium hose bag of injecting cream weber.tec 946 for the injection.

6. Firmly screw the adapter onto the nozzle thread.

Application

7. Use a manual pressure gun with injection cream to fill the drill holes completely from back to front.

8. Pre-wet the substrate until it is slightly damp.

9. Apply a bonding layer of watertight mortar weber.tec 933 (adjusted to a slurry consistency) to the groove area (where the angle of the concrete slab meets the basement wall), then fill the recess with weber.tec 933 (adjusted to a trowel consistency) using a flat trowel on the fresh bond coat.

10. Apply weber.tec 933 as groove mortar using the "wet-in-wet" technique.

     

11. After priming, apply a waterproofing layer of weber.tec Superflex D 24 over the entire surface in the transition area, overlapping the wall/floor area by approximately 20 cm.

12. Pre-spray a full-surface base coat of weber.san 951 S to the fully dried waterproofing layer of weber.tec Superflex D 24.

13. Apply a layer of damp-proof render weber.san 958 in contact with the entire surface of the pre-moistened, slightly damp substrate.

14. Using the "wet-in-wet"  technique, apply the renovation render in a single layer with a maximum thickness of 40 mm.

15. Level the surface using a straightedge.

16. After approximately 90 minutes, rub down the surface using a slightly damp sponge float.