Plan supporting layers and preparation materials
Choose backer-board components, leveling underlayment, a membrane format or primer preparation using confirmed system inputs.
Choose your purchase task
Compare all calculatorsEstimate panels, planned fasteners, measured seam tape or floor bedding mortar with explicit quantities and packages.
- Use for
- Bathroom floor underlayment · Tub surround walls · Cement-board wall sections
- Inputs
- Backer-board task · Project area (sq ft) · Panel length (ft) · Panel width (ft) · Planned installed fasteners (pieces) · Fasteners per box (pieces) · Measured treated seam length (ft) · Tape length per roll (ft) · Installed floor bedding area (sq ft) · Confirmed bedding coverage per bag (sq ft / bag) · Waste / allowance (%)
- Results
- Panels and purchased area in panel mode · Whole fasteners and boxes from a confirmed plan · Tape rolls from measured treated seams · Bedding bags from installed floor area and matched coverage
Estimate complete 50 lb bags from area, a fixed TEC Level Set 300 depth row, and an optional allowance.
- Use for
- Floor preparation before tile · Small level correction · Large floor underlayment estimate
- Inputs
- Project area (sq ft) · Coverage depth (in) · Waste / allowance (%)
- Results
- Adjusted project area (sq ft) · Fixed coverage per 50 lb bag · Required bags before rounding · Complete 50 lb bags to purchase · Nominal purchased coverage (sq ft)
Estimate fixed-row RedGard containers or whole KERDI rolls from a declared one-piece strip layout.
- Use for
- Interior waterproof membrane area · Interior crack-prevention area with specified ANSI A118.12 application
- Inputs
- Membrane format · Project area (sq ft) · Application and package coverage · Rectangle span across strips (ft) · Full strip run (ft) · Confirmed roll width (in) · Confirmed usable roll length (ft) · Confirmed side overlap (in) · Waste / allowance (%)
- Results
- Adjusted area (sq ft) · Selected package coverage (sq ft) · Required containers before rounding · Whole containers · Nominal purchased coverage in liquid mode · Full strips, cuts per roll and whole rolls in sheet mode · Modeled cut and purchased roll lengths
Keep concentrate, dilution water and prepared liquid separate while estimating complete containers from a confirmed coverage range.
- Use for
- Specified primer application before indoor tile underlayment
- Inputs
- Area for this application (sq ft) · Coverage rate basis · Lower confirmed coverage (sq ft / US gal) · Upper confirmed coverage (sq ft / US gal) · Water parts per one primer part (parts by volume) · Concentrate per container (US gal) · Waste / allowance (%)
- Results
- Adjusted area · Concentrate demand range (US gal) · Added water and prepared-liquid ranges (US gal) · Containers before rounding and complete-container range · Purchased concentrate range (US gal)
What belongs in this category
Supporting layers have separate purchase tasks. Backer panels, installed fasteners, seam tape and bedding mortar need their own quantities. Underlayment bag coverage depends on the selected product depth; a panel area is not a fastening schedule.
Membrane estimates keep captured liquid-system coverage separate from full sheet-strip cuts. Primer estimates distinguish original concentrate from prepared liquid. These tools calculate declared quantities; they do not choose a substrate, waterproofing system, dilution or compatible product combination.