Before you start waterproofing it's important that the floor is clean. Clear any dust and dirt away with a dustpan and broom.
After the primer has dried, silicone seal all of the gaps between the floor and the wall and anywhere you find gaps in the floor. Use a paint scraper to remove any excess silicone. Then let the silicone dry for 24 hours before you start waterproofing.
Apply masking tape around the wall to the level you want to make waterproof. In our case, we're masking to the height of where the primer was applied. If you want to waterproof to the shower recess, your masking tape needs to be at a height of 1.8m.
Start at the back corner of the bathroom. Use a roller to apply the waterproofing agent on the wall to the height of the masking tape. Then apply it around the width of the paint roller where the wall meets the floor.
Cut the waterproof membrane into lengths of the bathroom walls. Lay the membrane down so that half is on the wall and the other half on the bathroom floor covering the crack. To stick the membrane down, use either a paint roller or brush to paint over it with the waterproofing agent. Repeat this until all of the gaps on the floor are covered with membrane and painted over.
After you have covered all of the membrane on the walls and bathroom floor with the waterproofing agent, paint the rest of the floor. Then leave it to dry for 24 hours.