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Glazing Gasket Perimeter Loop Order calculator.

Keep separate opening perimeters intact when cutting gasket rolls, or pool length only under your permitted joint plan.

OPENINGS

Your inputs

Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.

Where to get this value

Use the actual usable quantity or dimensions of the product you intend to buy. Check the label and the unit shown here.

Opening 1
Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

YOUR ESTIMATE
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A clear estimate starts here.

Enter your dimensions and product details to see the quantity and purchase breakdown.

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Formula and assumptions
BEHIND THE NUMBERS

How this calculation works.

Keep separate opening perimeters intact when cutting gasket rolls, or pool length only under your permitted joint plan. Loop = 2 × (width + height) + supplied extra; rolls follow continuous-piece packing or explicitly permitted pooling.

Loop = 2 × (width + height) + supplied extra; rolls follow continuous-piece packing or explicitly permitted pooling.Calculated with normalised units

A worked example

Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.

Selected roll length
10 m
Specified extra per perimeter loop
0 m
Specified gasket joining plan
Continuous loops required
Opening 1
Measured gasket width
1 m
Measured gasket height
2 m
Identical openings
3

Gasket rolls for supplied perimeter loops: 3 rolls

Continuous-piece packing uses decreasing-length first fit. It is feasible for the stated pieces but is not guaranteed optimal. No cut kerf, damage or end trim is assumed; include these in your supplied piece lengths.

Before you purchase

Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.

All product dimensions, coverage, density, allowances and joining rules must come from your supplied plan or selected product. No building-code values are inserted.

Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-05. Calculation and review policy.

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