There is more to roofing than just nailing down shingles. A roofing system must also adequately ventilate the attic space. Proper roof ventilation prevents shingles from curling and reduces energy bills.

Of course, homeowners bear the greatest burden for keeping new decks free from mold, but there are some things a builder can do: Gap the decking properly (minimum 1/8”) for drainage. Pitch the deck properly away from the house for drainage (minimum 1/8” in 8’).