🏠 Your roof assembly – Part 1: Sheathing

This week we’re going to look at the components of your roof assembly.

Why it matters: Roofing is not a licensed trade in Texas, so homeowners need to educate themselves.

🖼️ The big picture: Building code considers the roof assembly to be the roof covering + the roof deck.

  • Roof covering = shingles or other material like metal panels or clay or concrete tiles.
  • Roof deck = the material (sheathing) that covers the framing of the roof and provides a solid surface for a roof covering.

🔬 Zoom in: Built to code, a roof deck consists of

  • 7/16” or thicker plywood or OSB
  • Installed with gaps between boards less than 1/4”
  • Uses metal H clips to strengthen the horizontal seams (optional in some cases but always preferred)
  • Nailed to the rafters every 6” at the edges and every 12” across the board with 8D common nails

🧰 Next level installation: Fortified roof decks go beyond code

  • Nailed every 4” with 8D ring shank nails to provide DOUBLE the strength against high winds and tornados.
  • Seams between boards covered with seam tape to keep out 95% of water compared to no tape.

🧐 Keep an eye out to make sure

  • All damaged boards are replaced
  • If you have obsolete penetrations — from a remodel where plumbing was moved or when HVAC or hot water heater were changed — those should be repaired with solid wood.

✅ For your Smart Homeowner list



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