Are you experiencing damp? Sika has a damp proofing solution that will guarantee you to get rid of your damp for good.

          

What you will need

  • Cemflex®
  • Cemflex® Membrane
  • Sikalite®
  • Portland Cement
  • Water
  • Wire brush
  • Block brush / large paint brush
  • Bucket to mix
  • Gloves
  • Mask
  • Mechanical mixer and paddle (quantities exceeding 5l).

       

Before & After

Damp walls to be damp proofed
Damp walls that have been damp proofed

Step 1

All coatings are to be taken off the walls. In severe cases where plaster has deteriorated,  walls should be broken back to concrete or brickwork.

Step 2

Entire area should be cleaned and prepared for plasterwork. Once cleaned dampen surface with water, however make sure there is no standing water on the surface.

Step 3

Brush the first layer of the Cemflex® slurry onto the surface and allow to dry, the following day should be long enough. (see datasheet of Cemflex® for mixing instruction and mix ratio.)

Guideline Ratios

Cemflex® Slurry:  1 litre Cemflex® + 1 litre water + 3.4kg Portland cement = 6-8m²

Sikalite®: 1kg Sikalite® to 50kg cement and 2 and half wheelbarrows of good plaster sand

Step 4

Apply a second coat of Cemflex® slurry that will act as a bonding agent and while the second coat is still wet and tacky, apply the plaster where Sikalite® has been added into the mixture.

 

GOOD TO KNOW: In severe cases sometimes three layers of Cemflex® slurry would be recommended with two layers of plaster.

Step 5

An optional recommendation would then be to brush Sikagard®-905 W on top of the plaster once it is dry. No plaster primer is needed before coating the Sikagard®-905 W onto the plaster.

         

SIKA'S TOP TIP

This system does not prevent rising damp. In cases of rising damp, you may have to treat your floor screed to prevent moisture creep across the floorscreed.