Underlayment Calculator
Calculate how many rolls or square feet of underlayment you need for your flooring project.
Utilisez des decimales si necessaire. Cette estimation se met a jour en direct et peut etre ajustee en toute securite avant l'achat.
Underlayment Buying Guide
This guide helps you turn your underlayment calculator result into a cleaner purchase plan. Use it when you want fewer return trips, better waste assumptions, and a more realistic cart.
Step 1: Read the flooring warranty
Many modern laminate and vinyl planks come with underlayment pre-attached to the bottom. Adding a second soft layer of underlayment will void the warranty and cause the joints to snap.
Step 2: Prioritize moisture barriers on concrete
If you are installing over a concrete slab or in a basement, you absolutely must buy an underlayment with a built-in 6-mil vapor barrier to block rising moisture.
Step 3: Buy the specialized tape
The rolls of underlayment must be taped together at the seams to create a continuous barrier. Buy the manufacturer's recommended foil or moisture tape.
Underlayment cost planning rule of thumb
Premium cork or heavy rubber underlayment costs significantly more than basic foam, but it drastically reduces the hollow 'clicking' sound of floating floors.
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FAQ Underlayment Calculator
Faut-il arrondir avant d acheter ?
Oui. Une petite marge couvre les coupes, la perte et les ajustements de derniere minute.
La disposition influence-t-elle la perte ?
Oui. Les plans simples demandent moins de marge, tandis que les angles, motifs et obstacles en demandent davantage.