Question: How do you put insulation in a wall?
Options:
Be sure the gaps between the board match the width of the insulation, use a pencil to cut the insulation to the correct vertical length, then press in by hand.
Be sure the gaps between the board match the width of the insulation, use a blade to cut the insulation to the correct vertical length, then press in by hand.
Answer: Be sure the gaps between the board match the width of the insulation, use a blade to cut the insulation to the correct vertical length, then press in by hand.