RoofRangeBaseTPO roof cost calculator
TPO is a heat-welded white membrane common on low slopes and some commercial flats — seams welded, edges flashed, often paired with insulation board. This calculator uses the TPO band (about $550 / $850 / $1,250 per square installed as of 2026-07), typically above EPDM rubber mid on the same squares. On a redo with tear-off mid $150, all-in mid lands near $1,000 per square before insulation recover or drain rebuild shove you toward high. Match the membrane name on your bid. Rubber, modified bitumen, and generic flat each carry different bands — picking the wrong page skews the comparison. No lead form; written membrane scope still sets the check amount.
Runs in your browser No signup Estimate only — not a contractor quote
Material locked for this page: tpo
Tear-off
Remove existing roof before install
Low
$13,000
Mid
$20,000
High
$30,000
When to use — and when not to
When to use
Quotes specify TPO membrane on a garage, porch, or small commercial flat. Comparing TPO bids to EPDM rubber on the same field. Budgeting strip-and-recover on an aging single-ply roof.
When not to
EPDM rubber → rubber roof cost calculator. Large insulated commercial recover → commercial roof cost calculator. Pitched shingles → asphalt roof replacement cost.
Assumptions
TPO $550 / $850 / $1,250 per square installed (2026-07). Tear-off on for redo. Insulation taper and parapet coping are extras outside mid.
Worked examples
14 squares TPO mid, tear-off on
Mid ≈ 14 × ($850 + $150) = $14,000
Insulation recover can add thousands beyond mid.
Same 14 squares rubber mid, tear-off on
Mid ≈ 14 × ($750 + $150) = $12,600
TPO mid often runs above EPDM mid on identical squares.
How it calculates
tpo ≈ squares × tpo_$ (+ tearoff_$ when enabled)
TPO membrane install band — welded seams on low-slope squares, not shingle steps.
- Enter flat field squares for the TPO area being quoted.
- Read TPO low / mid / high (~$550 / $850 / $1,250 per square as of 2026-07).
- Keep tear-off on when old membrane comes off — mid all-in near $1,000 ($850 + $150) on redo.
- Use rubber calculator when bids say EPDM instead of heat-welded TPO.
Common traps
- White TPO versus gray EPDM is a product fork — compare like bids.
- Heat-welded seams need skilled crew — low bids may skip proper edge detail.
- Ponding areas need tapered ISO — not in default mid.
- Mechanically attached versus fully adhered changes labor — ask attachment on bids.
Next tool
EPDM rubber → rubber roof cost calculator.
Generic flat → flat roof replacement cost.
Larger commercial → commercial roof cost calculator.
FAQ
Our 2026-07 TPO band runs about $550 low, $850 mid, and $1,250 high per square installed. Fourteen squares with mid tear-off land near $14,000 mid before insulation taper or parapet work.