Tips & Techniques


Oct 27, 2016

The right time for waterproofing areas depends on the region, climate and type of problem you might be experiencing. In general, waterproofing during the incorrect season or time of day causes product or application failures.

Certain regions in South Africa experience winter rainfall whereas others have summer rainfall. The season and time of day is really important when waterproofing roofing, for example. It’s very common to notice a leaking roof during the rainy season, but can only do the necessary waterproofing repairs during the dry season. A common problem is attempting to repair leaks and waterproof during the rainy season. Equally common is forgetting to waterproof during the dry season as the problem is no longer obvious.

Modern House for Waterproofing 

In winter rainfall areas it is best to repair roofs in the early summer – ideally in the morning once the dew has evaporated and before 16h00 when it starts getting cooler. Avoid painting, repairing and waterproofing midday. Ensure roofs are clean and dry. Follow the manufacturer’s instructions.

Waterproofing with membranes often fails as people do not know how to use it properly. Correct application is crucial when waterproofing and the technical datasheets should always be closely adhered to.

Waterproofing Bathrooms DIY Guide

The problem seems to be a leak in the wall of my shower. Can I repair water damage, rising damp or moisture caused by pipes in the walls, or is it something that the experts should look at?

The solution is that of course you can solve some problems yourself. Let’s see what you can do yourself and what you should rather let the experts look at.

Waterproofing External Plastered Surfaces

Problem: Water-affected external plastered surfaces such as parapets, walls, pillars etc.


  • Ensure that all surfaces are clean, firm and thoroughly dry before painting
  • Repair and fill any cracks
  • Prime with Plascon Plaster Primer
  • Apply Plascon Multiseal by brush or roller and build up to a thickness of 1mm in 3 coats, allowing 4 hours drying time between coats
  • Finish with top coat of your choice


Waterproofing Exterior Walls

Problem: Rising and penetrating damp (occurs to 1.1m above ground level)


  • Remove any paint completely until you are back to a cement / plastered surface
  • Wash with Polycell Sugar Soap, rinse and allow to dry
  • Remove and repair poor plaster with Polyfilla Masonry Patching Plaster
  • Apply 3 coats of Plascon Dampseal, allowing 24 hours drying time between coats
  • Thin the first coat 30% with mineral turpentine
  • Finish with top coat of your choice


Waterproofing Face Bricks

Problem: Moisture ingressed through face bricks


  • Remove any cracked or friable cement between bricks
  • Repair with Polyfilla Masonry Patching Plaster
  • Wash with Polycell Sugar Soap, rinse and allow to dry
  • Apply 3 coats of Plascon Brickseal, allowing 4 hours drying time between each coat