But the lumber was not usually kiln dried; as wood dries it shrinks. Shiplap vs. Plank There is a difference. As more layers of roofing were added there would be little chance that water would work its way through to the roof deck. There are actual shiplap panels that can be purchased but they exceeded my budget for this project. If you have roofers that don't know the difference between shiplap & skip sheathing, find a roofer that does. // < ! And taking the cheapest route, isn’t always the best, so why take the risk? I found several people who used floor underlayment for shiplap with great success. When the roofing material wore out, new composition shingles would be applied over the original roofing system. And if it does not, it sounds like the contract does not give them the authority or direction to proceed with resheathing. It determines how long your roof will last and how well it will protect the contents of your home. If you have shiplap now and they know that, and their intention is to resheet over it, you can ask them to put that in the contract in direct terms with the total price to resheet. Making Shiplap from Plywood. 3. OSB vs Plywood: Fast Fact. Shiplap vs drywall. But the manufacturers’ warranties will not cover leaks; all they warrant is manufacturing defects. Choosing the right type of plywood for the roof is one of the most important construction decisions that you will have to make. Shiplap Walls- 5 Reasons to Use CDX Plywood Vs. Luan Underlayment Most DIY shiplap tutorials I’ve seen use 4’ X 8’ sheets of 1/4″ luan underlayment ripped down to 6” to 8” wide planks. All of the spaces are even between the boards. As a homeowner, if you find yourself in this position, know that when you install a new decking system, you will have to decide between using plywood … The most common (and affordable) way to re-create a shiplap look from scratch is to use plywood. [CDATA[ Your email address will not be published. As shrinkage is from 5 to 10 percent, gaps of ½-inch or more are common. If your home was built prior to 1970 there is a good chance it will have board sheathing. [CDATA[ Wood that old has almost always dried out, meaning the resin has dissipated shrinking the wood and making it brittle. Your roof, and your peace of mind, will thank you in the future. Why Do We Need to Re-sheet Over the Existing Shiplap on My Roof. According to Dmitry Lipinskiy, owner of Roofing Insights, there is a 5% chance that older homes will need a completely new decking system when their roofs are repaired. Call 253.445.8950, or fill out our quick estimate form! There are actually several different ways to put wood on a wall. The recommended materials are exterior grade 7/16″ OSB (oriented strand board), 3/8″ OSB, or 1/2″ CDX true plywood. Roof decks on homes built before 1970 are often 1×8 fir pre-plywood shiplap.  Until the 1940s, exterior grade plywood was not available.  Since the boards used for shiplap were manufactured here in the Pacific Northwest, it was still cheaper than plywood up through the 1960s.  Most Western Washington residential homes during this time were built with shiplap roof decks rather than plywood. You can use shiplap anywhere. I am sure I am not the only one that has been deceived by what looked like venting but wasn’t. What if some of the new synthetic underlayments are used instead of the normal “organic” underlayments? // < ! It is common to find older homes with 3 or 4 layers of roofing over the original roof. The easiest way to make shiplap from plywood is to have the hardware store cut the large 4×8 foot sheet for you. Shiplap … These 8 to 12-inch wide boards were nailed together tight. If you want to avoid the headache of tearing up your new roof looking for a mysterious leak that “should not be happening”, it is in your best interest to apply solid sheathing over the existing shiplap for your roofing system to securely fasten to. [CDATA[ Shiplap roof decking was widely used in the 50 through 80’s era when plywood hadn’t yet made its way into new construction. Shiplap … In my opinion this is not repair or replacing, and I would dispute that it is damaged and is certainly not rotted. Router planks. Required fields are marked *. It is acceptable to apply wood shingles or shakes as well as some standing seam metal roofing systems. Shiplap doesn't have any gaps in the boards and can be roofed over as is usually. The Building Code changed in July 2004 and does not allow over-roofing when there are two or more layers of existing roofing. The keyword here is “solid.” It used to be standard to use shiplap, 1″ boards, tongue & groove, or other boards for the roof deck. I … This law applies to all areas and cities of Washington State. Older homes commonly have one or more layers of roofing over the original layer.  Shiplap can only take so many nail penetrations before it splinters and develops pattern inconsistency. This, and the space left by diminished overall size over the years, creates more opportunities for the new nails to miss the wood completely, causing eventual leaks. After the 1960s, the predominant residential roofing substrate became 1/2″ CDX plywood.  Today, a shiplap roof is usually 60+ years old. The MDF shiplap … Sharp Roofing is Seattle’s roof repair and replacement experts. The estimates I have received from roofers all suggest laying 1/2" CDX over existing shiplap …

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