Many homeowners choose carpet first when they’re finishing a basement – even when there’s the risk of flooding. Whether you already have carpeting or are considering it, here are things to keep in mind:

When to replace: If a carpet gets completely submerged in water – a half-inch or more – replacing it is best. If that isn’t an option, pull the carpet up and take it outside to dry, elevating both sides rather than laying it flat on the ground. Do not leave it down on the floor, folding it back to dry half at a time.

Although sections of damp padding can be cut out and replaced, if it is all saturated, replace it. And don’t rely on a surface touch test to determine whether you have a moisture problem underneath. The carpet can feel dry when the padding is soaked.

Mold: There is no such thing as a totally mold-free basement. The trouble starts when it begins to grow. Mold cells can be trapped underneath carpeting for years and not cause problems until the carpet comes up and the mold is exposed to the air.

Extra help: For perennially damp basements, try a subflooring system such as DRIcore, water-resistant panels installed slightly above the existing floor, leaving a gap of air between finished floor and damp concrete (www.dricore.com).

Carpet squares: Carpet tiles once found primarily in commercial settings are increasingly used in homes. The tiles, from companies such as Flor (www.florcatalog.com), are easy to install and can be pulled up individually when stained or damaged – or before flooding occurs. If they get wet, they can be sun-dried and reinstalled.