In this episode, we talk with Daniel about why lifted shingles should be of major concern to homeowners. It’s not just an age issue- it’s a sign that you may have some major repairs on the horizon.
Podcast Transcription: RoofLifeB029-203
Shayla: Welcome to the Roof Life of Oregon podcast. I’m talking with Daniel today. Daniel, when you see a lift on a roof, ya know, the shingles are kind of lifted up, what is that and is it a big deal for a homeowner?
Daniel: You know, there’s a few different things that can cause a lifting on the roof deck. One of the things that you’ll see, if it’s in the middle of the roof, there’s nothing around it, no pipes, no valleys, nothing like that, it could be what’s called a plywood pop. And let me explain what that is.
So there’s two main type of decks that you can have before the roof goes on. There are some other ones out there. The two main ones are either plywood or osb. OSB people call it particleboard but it’s not. It’s oriented strand board. You typically don’t have a plywood pop with oriented strand board but with plywood you can. And so when you put a roof together, you have to leave a gap in the deck. So if you ever look outside, you walk down the sidewalk and you notice that you have these lines cut into your driveway, or in your driveway, you have them cut into the sidewalk. Those are called expansion joints and that’s because everything moves – your house moves, your roof deck moves, concrete moves. It expands and contracts.
When it’s hot it expands, when it’s cold or contracts, so they have to have these gaps to allow to move around that way they don’t break. Your roof, believe it or not, does the same thing. So underneath the roofing shingles, underneath the tarpaper, you have plywood. Now, when the roof was originally put on there’s a couple of different ways they’re put on, but over time, if that plywood either didn’t have a gap or the gap wasn’t big enough, or just you know over time the house settles, the plywood gets closer and closer together and it doesn’t leave a gap.
You can either use a clip or you can space it. And so let’s say you tore off the roof, you put a new roof on, and the roofer didn’t re-gap the plywood, re-screw it in and it’s just sitting right next to each other. It moves around, moves around, moves around and finally has nowhere it can go. So the two pieces of plywood are pushing against each other. Finally one gives and it literally pops that plywood up, and you get this big buckle on the roof.
Now on a really steep roof, probably not going to have a leak. But when you get into the lower slopes, depending on where that plywood pop is, you could have a leak. Sometimes it’s just ascetics. If that plywood pop on a lower slope roof pops up right where the nails would be and the water gets stuck into like a little trough on there, the water will work its way under the shingles, start working on the nail, because it’s not getting off the roof like it’s supposed to and you get a leak. And the only way to fix that is take all the shingles off, take the paper off, go down into the plywood, re-gap that piece either with a saw, then re-secure and then put it back together. That’s if you’re only having one. If you’re having it all over the roof, you may need to think about putting a new roof on. When we put a new roof on, we want to do that. So when we’re going to take off your roof and we’re going to put a new roof on, one of the things we do is called plywood prep and it helps stop that problem. We tear the whole roof off. We make sure all the plywood is re-gapped, then we re-secure the plywood, then put the paper back on, and then put shingles. That keeps you from having a plywood pop and a leak later down the road.
Shayla: And not every company does a plywood prep, right?
Daniel: That’s correct. Most of them don’t. Most the time they just tear the roof off. They get all the nails or the staples off the roof and just go to town putting the roof on. That deck needs to be ready to go. If you don’t have those gaps it may not be for years before you have a problem. Most leaks in homes, according to National Roofing Contractors Association, most problems occur in the fifth to the seventh year. Most roofing contractors, their warranties run out right about that time.
Shayla: That’s just another added reason to contact Roof Life of Oregon when you need a new roof. They will do that plywood prep. And if you are having that lifting on your roof, make sure you reach out to the team for a well care check up and they will get you taken care of. Thanks Daniel.