What is roof decking and why does it change the price?
Roof decking is the plywood or plank boards that your shingles are installed on. Its condition cannot be fully seen until the old roof is removed. If the decking is rotted or damaged, it has to be replaced before the new roof goes on, which can add to the cost.
Why decking is hard to quote in advance
From the ground, a contractor can only see the top layer of the roof. Damaged decking usually is not found until the shingles are removed, and it is one of the most common reasons a final price differs from an estimate.
Ask your contractor how damaged decking will be handled and priced before the job begins.
Why attic ventilation matters
A roof needs air to come in low at the soffits and leave near the ridge. Good ventilation helps keep heat and moisture from building up in the attic, which can shorten the life of your shingles.
A roof replacement is a good time to make sure your ventilation is working properly.
Questions to ask before your roof is replaced
How will damaged decking be handled and priced? Does the quote include new vents? Will the flashing be replaced? Asking these questions helps you understand what your quote includes.
Related questions
What is radiant barrier decking?
Radiant barrier decking has a reflective foil layer that helps reduce heat entering the attic. It costs more than standard decking.
How much decking usually needs to be replaced?
It varies. A well-maintained roof may need little or none, while an older roof with past leaks may need more.
Can I just add a ridge vent?
A ridge vent works best when the attic also has enough intake ventilation at the soffits. A roofing contractor can check both.
