Waterproofing

**Waterproofing**

This trade covers the application of waterproofing systems to roofs, toilets, bathrooms, balconies, basements, water tanks and planter boxes, including surface preparation and application of membranes and coatings so that the structure is protected against water leakage and seepage.

1. Read and interpret drawings, waterproofing details and material specifications

2. Identify the correct waterproofing system for the area, such as liquid applied membrane, cementitious coating, torch on membrane or self adhesive membrane

3. Prepare the surface by cleaning, removing loose material, filling cracks and holes and making it dry and sound

4. Form angle fillets at wall to floor junctions and around pipe penetrations, drains and upstands

5. Apply primer to the prepared surface according to the manufacturer's instructions

6. Mix and apply liquid or cementitious waterproofing coatings in the required number of coats and thickness

7. Lay and bond sheet membranes with correct overlaps, end laps and sealing at edges

8. Reinforce corners, joints and penetrations with mesh or reinforcing strips

9. Turn up the waterproofing at walls and upstands to the required height and terminate it neatly

10. Carry out ponding or flood testing to check for leakage before finishing works

11. Complete the practical test within the given time following safe work practices