I replaced a roof last summer which had a deck made of 1x6 planks so you see there are various types of decks.
How to tell if plywood roof deck needs replacing.
These are the things an experienced roofer can tell you after the deck is cleared of all shingles.
So arm yourself with a flashlight and climb up under the eaves.
Sometimes it is just best to resheet it to give you the best deck for your new roof.
The inspection should take place when the old shingles have been removed.
If you are getting a new roof while you may not necessarily need to have the plywood decking replaced you should have it carefully inspected by a qualified roofing contractor.
If you think you might need a new roof the first place to check isn t your home exterior it s your attic.
The tear off gets a lot more complicated if you have something other than asphalt up there.
A sagging ceiling or roofline is another clue that there are major problems with a roof s decking and the roofing structure.
A failing roof deck will impact the integrity of a roof.
If you can see original wood shingles on the underside of your roof when you re up in the attic you ll need not only to tear everything off but also to install new plywood decking all of which likely adds 5 000 or more to your costs.
If you have many missing shingles this may mean that your roof is nearing the end of life stage and you may need complete replacing.
Since the boards used for shiplap were manufactured here in the pacific northwest it was still cheaper than plywood up through the 1960s.
Missing shingles are caused by natural weathering high winds age and possible improper fastening.
You walk on it you check the spacing between rafters you determine the thickness and if is it plywood or osb.
Other s ymptoms of a failing roof include high energy bills and ceiling stains.
Roof decks on homes built before 1970 are often 1 8 fir pre plywood shiplap.
Soaked or waterlogged decking can warp which can lead to a bowed or wavy roofline and ceiling.
Knots in the planks can cause it to break after the roof is done so if it looks iffy it is best to replace it.
That moisture can lead to rot and damage in the roof deck.
