underlayment
Noun
Meaning
underlayment (plural underlayments)
Something that is underlaid, such as planking in a room of a house; underlay.
Synonyms
Hypernyms
Phrases with the word
Examples
There is also one dip where I must not have filled a knot hole in the underlayment.
They do not include underlayment, adhesive, grout or other installation supplies.