Covered to Stop Heat Escaping
This page is the CodyCross answer for the clue below from Making a Documentary, Group 1504, Puzzle 5 (Planning Stage).
Question is: Covered to Stop Heat Escaping
and the answer is: INSULATED
Word Meaning:
INSULATED — Protected from heat, cold, noise etc, by being surrounded with an insulating material.
Definitions from Wiktionary.