underlayment

noun

un·​der·​lay·​ment ˌən-dər-ˈlā-mənt How to pronounce underlayment (audio)
: underlay

Examples of underlayment in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This leaves the underlayment of your roof exposed to spring rains, which can lead to water infiltration. — Asia London Palomba, The Spruce, 16 Mar. 2026 An underlayment of landscape fabric is also recommended to cut down on weeds. — Luke Miller, Better Homes & Gardens, 4 Mar. 2026 Every field features identical top-end standards of stadium lighting with nearly a foot of underlayment below the turf. — Tim Newcomb, Forbes.com, 7 May 2026 The program ensures that roofing solutions act as a system to strengthen roofs and protect homes — from the roof deck joint tapes to the underlayments, the shingles, and attic ventilation. — Jennifer Castenson, Forbes, 4 Mar. 2025 See All Example Sentences for underlayment

Word History

First Known Use

1949, in the meaning defined above

Time Traveler
The first known use of underlayment was in 1949

Rhymes for underlayment

See All Rhymes for underlayment

Browse Nearby Words

underlayer
underlayment
underleaf
See all Nearby Words

Cite this Entry

“Underlayment.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underlayment. Accessed 8 Jul. 2026.

Copy Citation
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of gambol

See Definitions and Examples »

Popular in Grammar & Usage

See More

Is that lie 'bald-faced' or 'bold-faced'?

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Commonly Misspelled Words

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)
See More

Popular in Wordplay

See More

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

One-Word Oxymorons: Bittersweet, Spendthrift, and More

Ten Words Ending with a Silent ‘T’

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

Is that lie 'bald-faced' or 'bold-faced'?

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
hangman letters and game
Hangman Lightning Round Figure out which word fits in the blanks.
See All