about 30 to 40 years30 to 40 years and we run the risk of delamination and required replacement in a few years. The other two have stated that as long as the plywood is good and stays dry, it can last forever.
What plywood is best for roof decking?
CDX plywood is considered the best roof sheathing material because of its better dimensional stability. That means it’s hardly waterproof and readily absorbs water, but it also sheds the water quickly and reverts to its original shape and thickness effortlessly.
What wood is best for roof decking?
Oriented strand board (OSB) – OSB is the most common type of material used for roof decking. It’s durable and readily available, and has relatively low costs. OSB is made of interwoven strands of wood bonded with adhesive.
Can plywood be used on roof?
In roofing, plywood can be used as roof decking. Roof decking is the material that lies on top of the main roofing structure, and the underlayment and roof covering are applied on top.
What is the best material for roof sheathing?
What Type of Sheathing Is Best for a Roof? Oriented Strand Board, OSB, is currently the best choice for roofs. It’s durable, water-resistant, and very cost-efficient. It also has a very consistent thickness, so you don’t have to worry about weak or uneven spots.
How often should roof decking be replaced?
Most roofs are engineered to last about 20 years, although the actual lifespan varies depending on the materials, quality of the installation, and the local climate. Other things that can lead to a damaged roof deck is excessive interior moisture caused by insufficient venting in the attic.
How thick should roof plywood be?
What is this? Standard roof sheathing thickness is ½” to ⅝” thick. If you are using OSB for your roof deck, then ⅝” is the recommended thickness. For plywood, which is slightly stronger than strand board, ½” thick is appropriate.
How thick should roof decking be?
The typical thickness of roof sheathing is about 7/16-inch, which is just under 1/2-inch.
Is it better to use plywood or OSB on a roof?
Quote from the video:
Quote from Youtube video: But for me personally you can see it on my job here we always go with the osb.
Do I need plywood on my roof?
Aside from shingles and underlayment, plywood decking is one of the most important components in your roof. The plywood decking is integral in keeping your home free of unwanted water and mold. If the plywood has gotten wet, it can have a disastrous effect on the rest of your roof, especially the shingles.
How much is a sheet of plywood for roofing?
Your price could vary depending on how much the roofing company charges for labor, but generally, you can expect to spend between $70 to $100 for each sheet of plywood. A 4 x 8 sheet of plywood covers about 32 square feet of roof area—and the average roof measures about 3,000 square feet.
How do I know if my roof decking is bad?
Here is a list of signs that your roof deck may be damaged or rotting:
- Shingles curling, cracking, or buckling.
- Missing shingles.
- Holes in the roof.
- Mold or mildew in the attic.
- Spongy feel when walking on the roof.
- Granular wear to shingles.
- Damage around chimneys, pipes, and other penetrations to the structure.
What is the difference between decking and sheathing?
While some roofing contractors use different terminology, roof decking and roof sheathing are the same thing. But now that you know they’re the same thing, what is roof decking (roof sheathing)? Roof decking (or roof sheathing) is the wooden boards that make up the foundation of your entire roof system.
Should you replace roof decking?
There is only so much that a repair could do for your roofing system, particularly for your roof decking. That’s why professional roofers often recommend replacing the roof deck right away instead of trying to repair it. This is especially the case if the problem is rot.
How do I know if my roof sheathing is bad?
If the roofline is in any way wavy, then it means your sheathing is damaged and needs to be replaced. You can also check for sagging from the inside. Go into your attic with a flashlight, and look up. If any areas of the roof appear closer to you than others, your roof is sagging, and it is time to call a professional.
Should roof sheathing replace?
If you can distinctly see broken sheathing boards, it’s time for a replacement. This can happen if a lot of weight is concentrated in one area — like if a tree branch or limb falls on the roof. It can also happen over time if your roof is well past its prime.
How often should you replace roof sheathing?
In general, this is the recommended replacement schedule based on the material used: Composition Shingles: 12-20 years. Asphalt Shingles: 15-30 years. Wood Shingles: 20-25 years.
What is the plywood on a roof called?
sheathing
Sheet decking (or sheathing) is exactly what it sounds like, flat sheets of wood. There are 2 types of sheet decking: plywood and OSB. OSB (oriented strand board) is the most common type of decking used on roofs today. It’s made up of wood chips/strips compressed together to form a flat 7/16” sheet.
How do you repair rotted plywood on a roof?
How to Replace Rotted Roof Decking
- Step One: Estimate the extent of the damage. …
- Step Two: Remove the roofing. …
- Step Three: Measure the area. …
- Step Four: Cut out rotted wood. …
- Step Five: Cut the replacement decking to fit. …
- Step Six: Position the replacement. …
- Step Seven: Secure the decking.
How long does it take for roof decking to rot?
Wood can Start to Rot in 1-6 months If:
Wood is untreated. The wooded area is sitting in water. Water and/or air space is hot & humid. The area is at or near the ground.
What size plywood is used for roof decking?
Most Common Thickness
The most common rafter spacing is 24 inches, and 5/8-inch plywood is recommended for that. It will support roof loads for most situations and is the standard for most roof applications. Roofs with very heavy loads may require 3/4-inch thickness.
