Material & Supply Calculator Exteriors
(Also see Liquid Waterproofing Membranes)
The main purpose of waterproofing is to prevent the intrusion of water and moisture in unwanted areas. All shower floors must have waterproofing.
MAPEI recommends MAPEI's Mapelastic AquaDefense for most areas where waterproofing is required.
Properly calculating your project’s total area helps ensure an accurate estimate of the materials needed. The shape of your project space may require combining multiple measurements.
Grout joint widths are also an important factor in a successful tile installation. When choosing spacer size, consider the aesthetics of the installation, the type and size of tile, the edge style of the tile and the type of grout.
3/16" is a standard-size joint width. Wider joints may be needed with installations of very large tiles. Even installations of small tile require a minimum of 1/16" grout joint. Note: Installations with tiles tightly butted together (zero grout) are not recommended and will likely develop serious issues over time.
Many factors should be considered when selecting the right trowel size for a tile installation, but the most important factor is the tile size. As a general rule, after tile is pressed into mortar, mortar should cover the entire back surface of the tile without voids or trowel lines. So, take time to check for proper mortar coverage by periodically lifting a couple of tiles and inspecting them for coverage. If there are voids or trowel lines showing, a larger-sized trowel may be required for the installation. Back-buttering is generally recommended for tiles with any side 15" or greater. Installations of tiles larger than 24" x 24" typically require the skill of a knowledgeable and experienced tile installer. The Technical Data Sheet and product packaging will provide mortar coverage for common trowel sizes.
Your Project Specs
Exteriors Supply List
Congrats, your Exteriors Project has been successfully calculated. Below you’ll find a list of all the MAPEI products you’ll need to complete your project.