SettingsSettings for this calculationUS
Waste is set to 5% by hand. Pick a tier above to replace it, or keep your own figure.
The total length of all EPDM membrane seams to be taped or adhered.
Add up the length of every field seam and flashing seam where adjacent membrane sheets or details meet.
Extra tape or adhesive to allow for splices and application waste.
Accounts for overlaps at tape splices, trimming, and material lost during application.
Seam tape needed
273 ft
They open the calculator with your figures already in it
EPDM Seam Adhesive/Tape Linear Footage Calculator: 273 ft — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- Total seam tape = total seam length × (1 + waste allowance), the standard method for estimating continuous seam tape/adhesive along membrane seams
Inputs used
- Total Seam Length
- 260 ft
- Waste Allowance (%)
- 5
What this calculation does not cover
- Takes the seam length on trust, and that is the largest number in the result. Field seam length is set by the membrane roll width and the direction the sheets run — the narrower the sheet, the more seam per square metre — plus an end lap wherever a roll runs out. A guessed seam length moves the answer far more than the waste allowance ever will.
- Blind to tape width. Seam tape is sold in more than one width, commonly 3 in and 6 in, and a detail that calls for the wider tape roughly doubles the cost of every metre counted here. Linear metres alone do not identify what to buy.
- Primer is quantified nowhere on this page, though it has its own coverage rate and its own order line. It goes on both mating faces of every seam, which is twice the width being taped, and running out of it stops the crew with a full box of tape sitting on the roof.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-06 · in the site-wide review of 2026-09-06 · v1.0.1
Regulatory standards & verification citations1
- Total seam tape = total seam length × (1 + waste allowance), the standard method for estimating continuous seam tape/adhesive along membrane seams
Cite this page
Your workspace
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Tools and safety for this job
To lay the EPDM membrane. Generic types, no brands, no prices.
Protection this work requires
- A dust mask does nothing about solvent vapour: ventilate through, and use an organic-vapour (A1) cartridge respirator in an enclosed room.
- Most fatal falls on small jobs are from under three metres: use a tower or a ladder tied at the top, and never work off the top two rungs.
- Knives cause more site injuries than any power tool: cut away from your body, change blades often, and wear cut-resistant gloves to EN 388 level C for repeated cutting.
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Essential
Roller frame, sleeves and tray
Tape measure
Utility knife
Recommended
Brushes
Also needed as materials: replacement blades, roller sleeves.
what each roofing tool is for, and the spec that decides which to buy where one does.