Moisture Barrier Calculator
Calculate the number of moisture barrier rolls needed for a floor area, accounting for roll dimensions and overlap.
How to Use the Moisture Barrier Calculator
- Enter the floor area in m².
- Enter the roll width and length in metres.
- Enter the overlap in centimetres.
- Click Calculate to see rolls needed and total barrier area.
Casos de Uso
- •Calculating moisture barrier rolls for laminate flooring installation.
- •Estimating materials for concrete slab moisture protection.
- •Planning crawl space encapsulation.
- •Budgeting flooring installation projects.
Fórmula
Rolls needed = Floor area / ((Roll width − Overlap) × Roll length), rounded up.
Preguntas Frecuentes
What overlap should I use?
A 15–20 cm overlap is standard to ensure a continuous moisture barrier with no gaps.
When is a moisture barrier required?
Moisture barriers are required under laminate, hardwood, and engineered flooring installed over concrete slabs or in high-humidity areas.
Is it free?
Yes, all calculators on OhMyCalc are completely free.