Cut the mesh to length and push it right into the wet waterproofing layer. This make installing tiles later a little easier.įiberglass mesh can also be installed in the corners and seams. I use the flat side of the trowel or brush to smooth the waterproofing. Work the waterproofing into the cracks with your brush and smooth the surface. Make sure you have a good amount of product in the corner seam. The brush is great for getting waterproofing into small areas you can’t reach with other tools.Īpply waterproofing about 6 inches on each side of a corner. Use the trowel and/or roller to apply product first and then the brush to work it into all the corners, seams and cracks. Buy it Here on Amazon.Īpply the waterproofing sealant to all the corners and seams first. It’s applied directly to the concrete-board with a roller, trowel or sprayer and a brush. I use a liquid waterproofing sealant like Redgard. These are the most likely areas that will get water penetration. Once all your concrete-board is hung, it’s very important to seal all the seams and corners. It’s especially important to waterproof concrete-board in extremely wet areas like showers. Apply at least two coats of waterproofing.If you apply waterproofing correctly, you won’t need the additional membrane under the cement-board. I recommend waterproofing all the large flat areas so the shower is completely red. Once installed, use a liquid waterproofing sealant like Redgard on all cracks, seams and screw holes.
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