Do You Need To Waterproof Bathroom Floor
If the bathroom floor is either concrete or compressed fibre cement sheet flooring then there is no requirement for full waterproofing of the floor and the extent of floor waterproofing will depend on whether it has a bath with a shower over it or the shower recess is enclosed with a shower screen.
Do you need to waterproof bathroom floor. No ifs buts or maybes- it needs to be done properly. Once again paint the area then put the membrane down and give it a second coat to flatten it. Next check for any high spots and grind them down.
4 Waterproof the shower floor Install reinforcing membrane where the floor joins the walls and around the drain. If the bathroom floor is made of or contains wood or if the bathroom is on the second story or higher the whole floor must be waterproofed. Without adequate waterproofing you can easily run into problems.
The walls need to be waterproofed up to 150mm. Floors shower enclosures and areas around the toilet and bath need to be thoroughly sealed but the walls and ceilings do not need to be comprehensively waterproofed. Because of the risk of leaks overflow and steam water can get to all parts of a bathroom.
If the bathroom is not on the ground floor the entire bathroom floor must be waterproofed. You will need to check for any drummy tiles by tapping on them with the handle of a screwdriver. When your membrane is installed waterproof the rest of the floor.
Bathroom walls must be waterproofed up to a height of 150 mm The step down from the shower to the floor must be waterproofed to a height of at least 100 mm. If the bathroom floor is above ground level or made of timber plywood or particleboards the entire bathroom floor must be waterproofed. As long as you use paint that can withstand moisture and steam you can paint your walls and install some of your fixtures.
The thing is with waterproofing your bathroom- you need to get it right the first time. Floors and walls can be. To waterproof the wall the floor joint you need to remove some of the tiles.