Scottish Checked Cloth
Puzzle 20 of Building a House Hard Pack
Question is: Scottish Checked Cloth
and the answer is: TARTAN
Word Meaning:
TARTAN — (uncountable) Woven woollen fabric with a distinctive pattern of coloured stripes intersecting at right angles originally associated with Scottish Highlanders, now with different clans (though this only dates from the late 18th century) and some Scottish families and institutions having their own patterns; (countable) a particular type of such fabric.
Definitions from Wiktionary.