Tile membrane roll estimator

Tile Membrane Calculator

Estimate tile waterproofing or uncoupling membrane rolls from surface area, openings, roll coverage, overlap, waste, seam tape, and material cost. Use it between tile area, backer board, thinset, and grout takeoffs.

Units

Tile surface area (ft²)Openings or deductions (ft²)Overlap allowance (%)Waste / corners (%)Coverage per roll (ft²)Seam tape allowance per roll (ft)Tape roll length (ft)Cost per membrane roll ($)Cost per tape roll ($)

Membrane rolls

Order area

Tape rolls

Rough cost

Membrane systems are product specific

This calculator estimates rolls and seam tape only. Waterproofing, uncoupling, seams, corners, drain kits, overlaps, thinset type, flood testing, and manufacturer instructions control the real installation.

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Tile Backer Board Calculator

Estimate substrate sheets, screws, and seam tape before membrane.

Thinset Calculator

Estimate mortar bags for setting membrane and tile.

Shower Tile Calculator

Estimate shower wall and floor tile boxes for the same wet area.

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Tile membrane formula

Net membrane area = surface area - openings

Order area = net area x (1 + overlap % + waste %)

Membrane rolls = order area / roll coverage

Tape rolls = rounded rolls x tape allowance / tape roll length

Sample takeoff

A 120 ft² bathroom floor or shower area with 5% overlap, 10% waste, 54 ft² rolls, and 20 ft seam-tape allowance per roll needs about 3 rolls and 2 tape rolls.An 11.1 m² bathroom floor or shower area with 5% overlap, 10% waste, 5 m² rolls, and 6 m seam-tape allowance per roll needs about 3 rolls and 2 tape rolls.

Tile Membrane Calculator FAQ

How do I calculate tile membrane rolls?+

Subtract openings from the tile surface area, add overlap and waste, then divide by the coverage per roll.Subtract openings from the tile surface area, add overlap and waste, then divide by the coverage per roll.

Is tile membrane the same as backer board?+

No. Backer board is a substrate. Membranes are waterproofing or uncoupling products and must follow the system instructions.No. Backer board is a substrate. Membranes are waterproofing or uncoupling products and must follow the system instructions.

Does this include preformed corners or drain parts?+

No. Add corners, bands, collars, drains, and niches from the product system separately.No. Add corners, bands, collars, drains, and niches from the product system separately.