Beaumont Roofing The decking under an older Mid-County roof isn't plywood
Walk into a lot of the 1950s houses around Port Neches and Groves and pull a shingle back far enough, and what you find under there isn't a sheet of plywood or OSB. It's individual 1x6 or 1x8 boards, nailed up one at a time, with gaps between them you can sometimes see daylight through from the attic. That's plank decking, and it was standard practice when these neighborhoods were built. It isn't automatically a problem. It's just a different substrate than what a modern roofing crew expects to find, and it changes what a re-roof actually costs and how it gets inspected.
Why gaps and nail hold matter more than people think
Plank decking was fine for the wood shingles or early composition roofing it was designed to carry, but decades of Gulf Coast heat cycling, humidity, and the occasional storm have taken a toll. A few things show up consistently on these houses:
- Gaps between boards have widened as the lumber dried and shrank over seventy-plus years, which affects how evenly new shingles lie and how well fasteners grip.
- Nail hold in old, dry 1x material is weaker than in new plywood. A nail that goes in easily isn't necessarily holding the way it needs to for a wind-rated shingle system.
- Individual boards can be cupped, split, or soft near old nail holes, even when the roof looks fine from the ground.
None of this means the roof is failing. It means a crew has to actually get on the decking and evaluate it board by board before fastening down a new roofing system, rather than assuming a uniform plywood deck like they would on a newer slab-on-grade home across town.
Why sheathing shows up as its own line item
If you've gotten a quote for a re-roof on an older Port Neches or Groves house and noticed a separate charge for sheathing repair or overlay, that's exactly why. A contractor can't quote plank-deck replacement the same way they'd quote a flat per-square tear-off on a house with plywood decking, because nobody knows exactly how many boards need replacing until the old roofing is off and the deck is exposed. Reputable crews price the tear-off and new roofing system as the base number, then handle sheathing repair or a plywood overlay as a separate item, billed to what's actually found. Treat a quote that doesn't separate these two as one that's guessing.
What the windstorm inspector actually wants to see
Jefferson County is inside TWIA's first-tier coastal area, which means a re-roof here needs to be installed and documented to the specifications TDI has adopted for windstorm coverage, not just nailed down to look right. On plank decking specifically, the inspector is checking that fasteners are landing solidly in sound wood, not just punching through a gap or a soft, split board. That's part of why a crew needs to inspect and often repair or overlay the decking before the new system goes down — it's not an upsell, it's what has to be true underneath for the finished roof to pass. Our roof replacement to windstorm specs work is built around that reality on older Mid-County homes, and if you just want someone to look at what's there first, a straightforward roof inspection and certificate check will tell you where the deck actually stands before any decision gets made.
A practical sequence for an older plank-deck roof
- Get the existing roofing removed and the deck fully exposed — don't rely on a drive-by estimate.
- Have each board checked for soundness, gaps, and nail hold, not just a general look at the attic from below.
- Get a clear, separate number for any sheathing repair or overlay before work starts, not after.
- Confirm the new roofing system and fastening pattern match what's needed to document windstorm compliance.
- Keep the paperwork — the inspection trail matters as much as the shingles once the job is done.
If the house also has original wood siding from the same era, it's worth having that looked at in the same visit — a lot of these homes need both, and our wood siding replacement crews are used to working on the same 1950s framing.
The bottom line: on a plank-decked 1950s roof in Port Neches or Groves, the deck itself — not just the shingles — is what decides whether the job passes inspection and holds up through the next storm season.