If weight is still a concern consider ultra light half inch drywall.
Waterproofing sheetrock for tile.
Start by removing any molding switch plates outlet covers and other hardware attached to the area being tiled.
Laticrete tile waterproofing membrane products provide protection for floors and walls for applications ranging from occasionally wet to continuous water submersion as in showers or pools.
Next take the tile adhesive thinset mortar and apply it to the drywall with a trowel.
Work it into the spaces using a diagonal motion.
Allow the primer to dry completely.
Blueboard is a type of drywall that is frequently used for a tile wall in a shower.
The thickest of all the types of drywall 5 8 inch drywall is often fire resistant drywall.
You should not ever put tile directly onto drywall even the green board water resistant kind.
Look into cement board if you need waterproof drywall.
Moisture resistant drywall is best suited for areas such as untiled bathrooms and basements where there might be damp conditions and humidity with minimal splashes of water.
Choose from liquid waterproofing membranes which can be applied for both waterproofing and as a crack isolation membrane anti fracture or waterproofing sheet membranes which allow for a quick easy waterproof installation.
Roll it onto the surface evenly to avoid drips that might cause the tiles to hang strangely.
Not only is it water resistant but blueboard is easy to find and inexpensive making it an ideal option for those on a budget.
Most tile have a recommended grout that works well with them so check your manufacturer s instructions.
Remove any remaining dust oil or grease with tsp tri sodium phosphate or an ammonia based cleanser.
You should be attaching the tile to cement board or over a wire lath with mortar.
Scrape away any loose or peeling paint or wallpaper.
You don t really water proof the drywall itself.
You protect it with a layer of water proofing material.
Roll the primer onto the drywall in a thin even coat.
This type of waterproof drywall is designed for wet areas such as showers and bathtub surrounds.
This is the most common choice for interior walls because they are easy to carry and hang.
Let the wall dry thoroughly.
Schluter systems kerdi seal mv orange plastic waterproofing tile membrane.
Once the thinset has dried for 24 hours remove the spacers and prepare the wall for grout.
Pour the oil or latex based waterproofing primer into a paint tray.
Step 4 place tile adhesive on the sheetrock.
Furthermore blueboard is not difficult to install.
Mix a small amount of grout at a time and apply it with a rubber float.
Paint the primer onto small areas or in corners with a paint brush.