PVC Roofing Calculator
PVC membrane and accessories from roof area.
Inputs
%
Results
Roof Area (sqft)
5,000
Membrane Needed (sqft)6,030
Number of Sheets6
Fasteners + Plates1,800
Termination Bar (pcs)30
PVC Edge Metal (pcs)30
Drain Assemblies4
Est. Material Cost ($)$6,125.00
Roof Area With Waste5,400
How to Use This Calculator
- Enter roof dimensions (length x width in feet), membrane thickness (mil), and sheet width (ft).
- Enter the number of roof drains.
- Review roof area, membrane sqft, number of sheets, total seam length (LF), and fasteners.
- Include walkway pad quantities for maintenance access routes.
- PVC seams are welded with hot air -- ensure installers have certified welding equipment and experience.
How the result changes with Roof Length (ft)
| Roof Length (ft) | Roof Area (sqft) |
|---|---|
| 201 | 10,050 |
| 701 | 35,050 |
| 1,300 | 65,000 |
| 1,800 | 90,000 |
What each input means
- Roof Length (ft)
- Length of the roof area in feet.
- Roof Width (ft)
- Width of the roof area in feet.
- Membrane Thickness (mil)
- PVC membrane thickness: 50 mil (economy), 60 mil (standard), 80 mil (premium).
- Sheet Width (ft)
- PVC roll width. Common: 5 ft, 8 ft, 10 ft.
- Roof Drains
- Number of internal roof drains requiring PVC drain assemblies.
- Waste Factor (%)
- Extra material for overlaps, cuts, and waste.
What each result means
- Roof Area (sqft)
- Total roof surface area.
- Membrane Needed (sqft)
- Total PVC membrane including overlaps and waste.
- Number of Sheets
- PVC membrane rolls required.
- Fasteners + Plates
- Mechanical fasteners with stress plates for seams and perimeter.
- Termination Bar (pcs)
- 10 ft termination bar pieces for roof edge.
- PVC Edge Metal (pcs)
- PVC-coated edge metal pieces (10 ft each).
- Drain Assemblies
- PVC-compatible drain boot assemblies.
- Est. Material Cost ($)
- Approximate material cost (labor not included).
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersRoof Length (ft) = 100, Roof Width (ft) = 50, Membrane Thickness (mil) = 60, Sheet Width (ft) = 10 = 6 input(s) provided
- Calculate Roof AreaRoof Area = roofLength * roofWidth5000 = 5000
- Calculate Membrane NeededMembrane Needed = numSheets * sheetWidth * (roofLength + 0.5)6030 = 6030
- Calculate Number of SheetsNumber of Sheets6 = 6
Engine last updated . Checked against 1 independently-derived test — how we verify calculators.
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