Plywood vs OSB Roofing Debate | Roofing Insights | Roof materials
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- Опубліковано 31 лип 2024
- Plywood vs OSB for Roofing re - reoof re-deck Debate | Roofing Insights
Comment below what you install and why and how much are you paying in your area and if you experienced shortages or price increases.
00:00 Intro
01:52 Both OSB & plywood hate water
02:39 Why Roofing Insights goes with OSB
04:19 Plywood kills curb appeal
04:58 Lesser of two evils
05:36 Major shortage in supplies
07:20 Roofing Insights guarantee
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I see CDX delamination ALL THE TIME. Almost never see OSB loosing structural integrity except for long term leaking.
Thank you! Looks like our audience is split on this issue today!!! What market are you in? Dmitry
Pittsburgh
I agree
how long term?
I have used Kronospan for 53 years. Still going strong. it is manufactured from waste timber and waterproof glue. British made as well. Regards from Wales.
Most new homes use clips in between OSB or Plywood so you wouldn’t have that problem you mentioned of sagging. Also national builders for roofing association was indifferent about OSB or plywood (two of the major companies preferred plywood from that association), but OSB got sued by home owners association for rotting in many homes, while plywood hasn’t and is an older material. Has better water resistance according to mill companies as well and is regarded as better by mill companies.
⚠️ Hi Dmitriy, First, thanks for all the quality content and best practices. I had an engineering student work for me over the summer. This created many thought provoking questions. The most important lesson was to extend that inquisitive nature into everything you do. I watch Matt Risinger frequently and Matt is a believer in the expression about wood “if it is not dry, it will die”.
Have you heard of or have thoughts about rolling on a sealer like KILZ 2 on wood decking? Also, what do you use between sheet edges?
Dimitry, you might have considered pulling off that water-logged and decayed (and smelly) sheathing and installed all new on a well ventilated surface.
If you sheet plywood over older decking it wouldn't flex like that, if it's a huge dip on the roof you can shim it. We never used osb due to the nails not holding as well. Plywood wins in my opinion
more cost effective
out here home owners want to save money
all wood is very expensive lately in Canada
its crazy compared to a decade ago
Yes. Nails hold better in plywood, but when have you ever had a problem with singles pulling the nails out?
@@michaelbrownlee4857 Replacing your roof in 2 years is not cost effective for anyone. I've already seen this out here on new construction. OSB is complete garbage. Never build a house out of the cheapest crap you can find, it costs way too much to fix it later.
You right yes i used work roofers and most time i delevered osb more than plywood yep! so now my sister hiring roofer today and they noticed when my sister boughted as is so i figure out i told the roofer let me take care of the back porch remolding with my brother, so itsd heck so much money i ever had! that house is 1074 they still use osb but the back porch its playwood! Gezz so they replaced and then we do rest of it later as it dried finally! no more leaking underneath the porch! so i told my sister i had to tear the siding out! and let it Dried, when we can! Good luck on ur business!
My OSB got wet and funky and now I need to replace my roof. I'm in the process of deciding whether or not to use ply or OSB for my flat roof. It will be installed over existing boards that are fine. EPDM will be the waterproof barrier.
Ha I'm looking at this building a shed I gone with osb but my supplier ran out also so I'm 2 boards short lol
Thanks for the advice
I preach tthis stuff shingles r a quarter of it the main job is the underlayment and wood love how he is using ice and water on the whole house great job guys
Couldn't agree more with Jared Montoya. In our experience here in Ontario, aspenite will fail quite quickly upon getting soaked. I have seen some fir ply-wood that was leaking for a year or two and all it did was discolour it. It could be true that aspenite stands up better to the heat. I don't know. I ridge vent basically everything and use fir ply-wood only.
Thanks for feedback! How much did your prices go up for it?
The answer is clear: 1 x boards. I have a 106 year old house in Houston and 90% of my decking is the original 1 x 10 pine shiplap in great shape. The other 10% is new (less than 4 year old) 1 x 10 non shiplap boards spliced in by cutting the rabbits off the old shiplap and butting the new boards tightly against the old ship lap. The new 1 x wood shrinks a little and you end up with only a 1/8 to 1/16 gap. BTW only about 5% had to be replaced due to rot and that rot was only due to a dead valley which now has a cricket. The other 5% was replaced due to knots falling out or big splits caused by all the re-roofing jobs over 100+ years (hurricanes, always had 3-tab shingles so it’s probably been reroofed a dozen times). The attic was also improperly ventilated for the first 50 years (gable vents weren’t added until 1950). And the underpayment was always felt 30 lb until recently. So what’s the moral of the story? 1x10 board is the 100+ year old decking.
7/16" osb $62.97 5/8" $68.97 here in Fairbanks, AK. crazy! Gotta think of increasing home insurance to cover cost of rebuild in case of total lost.
OSB 7/16 went up to $95 and CDX up to $115 and drop in November to 16. This year 2022 went up to $52 and now is finally coming down to $38 bulk purchase.
I used 1/2" advantech on my roof. It's way better than any other alternative. Moisture resistance is phenomenal.
Yes, Thats the best choice out of them all
Advantech is the best. But use 5/8 on a roof
@@RoofingInsights3.0 do you think it’s worth going 5/8 for advantech?
advantech what?.... because the first thing that came up when i googled was advantech osb
Central Indiana, Just a few months ago it was about $8 a sheet for 7/16 OSB. Currently it is anywhere from $20 to $28 a sheet right now, but sold out.
And it will not stop there: roofing shingles already in shortage, other materials will cost more shortly
Can you do a video coomparing/contrasting planks ? Seems like that is the best.
in my experience they are both done for if they get soaked and stay that way for a length of time. plywood seems to be more resilient and have a better nail bite but also $10 a sheet more give or take.
do they use that green (treated) plywood in roofing, or is that against code?
@@notimportant3686 its expensive and if you need that you likely have a ventilation problem. That stuff is ideal for a shed floor or high moisture environment
How much reliable are the osb sheets for holding together wood frames of an A frame cabin, the frames are meant be conected only with these sheets?
Osb in ohio 7/16 is 52.00 a sheet plywood 5/8 is 45.00 sheet great information Video and also FJB 👍
Just received a roof replacement quote from a roofer in my area in Chicago Ill. $11,985 to replace soft wood with CDX PLYWOOD at $5 linear foot. Or do a re-sheet of entire roof with 1/2” plywood for an additional $7500 is the re-sheet necessary or should I just stick with the original quote and have them replace just the boards that are bad? Chicago bungalow built in the 1940’s leaky roof.
Between $22-$35 depending on supplier here in Houston Texas !! All lumber going through the ROOF how ironic 🤣😕
What type of nail would you prefer for 7/16 osb ?
I always pass over osb and deck over with 1/2” cdx. It was $17 per and not I’m paying $30. In New Hampshire. For 30 a sheet it will be hard to not just but 1/2” t&g advantech for 35
Do u need h clips on osb if u space correctly without and decking on existing 1by roofing?
OSB is $17.85 at Lowes and HD at this time. I held off and was waiting (hoping) for the price to drop so that I can reroof my Moms shed. I got my stash now just in case price rise again. With that said, I used d regular plywood on my shed build which is about 15+ years old, but will use OSB for my Mom's shed (8x10) which is about 25+ years old. The OSB on her shed has rotted and is caved in at some parts of the roof. Also, the idiots did not install any ventilation or felt paper and it looks like they used stables for the shingles (don't see any nails in the OSB). I have my work cut out for me; new roof, vents, a couple corner board replacement and a new paint job.
I'm paying $31 per sheet out in northern California :( , I will be using CDX for the next few projects since its about $5 cheaper, i do prefer using OSB tho. Nice video btw.
Thanks Adrian for price feedback!
Looking at almost $34 a sheet on a 1/2” @ Lowes here in DE.
7/16 is around 21$ a sheet.
East TX
Thank you.Great video.
Thanks for the comment!
Last 3 months we have seen prices go from $12, to $15, to $18 per sheet in South Central PA (Lowes). Just called 84 Lumber when Lowes ran out and they were $27 plus a sheet.
It will go up again, what’s the percentage of your roofing jobs that requires full redecking?
@@RoofingInsights3.0 It's not half, but lately it is getting close to that.
No osb in western Wisconsin. If it is available it $ 40 a sheet for 1/2 inch
When I was buying 1/4 OSB. My price went from about $7. A sheet to over $38 a sheet.
My contractor will charge me $82 per sheet of OSB for all sheathing that needs to be replaced-I don’t know what they have to pay.
I have not seen any shortage here on OSB but the price went up drastically
It's at $18.00+ per sheet for ⁷/16 in pa as of last month.
Our Roofing Bid listed $29.99/sheet of 7/16" as of 11/12/20. California.
@@shawni321 Pa roofing supplies are at $35.00+tax and hd and lowe's are at 23+tax. Figured west coast would be less considering logistics, but you guys seem to get the rawl end of things.
However lumber yards are crazy high with osb and pressure treated. $56.00+tax for 2x10x16s just bought 2x10x16s at Lowe's today for $26+tax. Think the yards are riding the covid-19 increase as long as possible.
05/23/2021
osb is now $68/sheet fixing and filling in those planks is starting to look like a good economical option
Yeah - and you can use those extra long pallets.
First time I have to really disagree with you..OSB doesn’t hold up at all to leaking, you can put your finger through it when it’s wet. After 35 years of roofing & installing thousands of roofs I’ve found very little delamination with plywood but OSB turns to mush, .it’s also dangerous with one side being very slippery & 7/16 should never be used do to nail pull out specs, but then again i consider you a very honest & up front person..I live in Los Angeles maybe our climate has a different effect on them..
I was a home inspector for 24 years. It is my experience that plywood holds up several times longer than OSB it the wet conditions we see in the Seattle area!
I would not use OSB in the eves and over-hangs. I find that plywood holds up better in the eves.
@@bobbackstein8009 I honestly wouldn’t use it on a dog house..
7/16 @ $22.75, 19/32 @ $27.47 here in Kentucky. ZIP is +$10 on top.
Dimitry thank you for the video, love watching them. I like that shirt what size shirt is the one that you are wearing medium or large??
small🤫
I have had most of my roofs being 4-5 ply, and have never had an issue.... I will have to post some pictures to the group tomorrow if my roof... it is decked with OSB and fresh looking but busted to shit. In Oregon if there is a leak OSB doesn’t stand a chance. CDX will only get a discolored spot. I think OSB is only used to save money... wood is crazy expensive. Just spent $26 per sheet on CDX, OSB is at $12 last I looked but that was when CDX was at $22. I’ll spend the extra on CDX....
This just inspired me to make my first video.... coming to the group in the morning.
OSB we are paying $19-24 a sheet and 1/2 plywood is $27. Due to Corona In the Washington D.C Metro area
Why are they charging $43.00 a sheet in Texas? 04/16/21
Now it’s $50 in Md $36 A sheet with contractor and military discount.
I’m curious if it’s delaminating because you guys have a lot of snow up there
That plywood actually lasted a good long while to make it 56 years, probably through several roof replacements and/or roof overs. I'm not sure how long OSB has been used as roof sheathing, but I don't think it's been commonly used during the past 50 years as much as 1x and plywood has, so I think the long term performance of OSB is still yet to be determined. In my experience, OSB is an affordable solution if you have to deck over a bad roofing surface, but not necessarily a better solution than CDX, or even RTD, which is what most people in our area use when roofing with 3/8 (11/32") plywood or 1/2 (15/32") plywood. The way plywood is made has changed in recent years. While poor ventilation certainly delaminates CDX over time, water most certainly is the kryptonite to OSB, but RTD plywood sheathing is manufactured in such a way to prevent delamination, which makes it a better final product than lowest class of plywood referred to as CDX. However, just like OSB, the long term performance of RTD is also yet to be determined. Nevertheless, I do personally like plywood over OSB because it's lighter, and sometimes if the rafter spacing is wide, I've seen OSB sag, because it's heavier. On the other hand I also like the price of OSB over plywood, and that's why OSB dominates probably more than 75% of the sheathing market. I also like OSB because it's engineering during manufacturing does make it actually stronger than plywood, and if you can keep moisture away from OSB, who knows, over time it could perform better. However, if price is not an issue, I’d have to say, I would still choose the strength and durability of RTD over CDX and OSB. If price is an issue, OSB does represent value as a solid and affordable nailing surface. The radiant barrier OSB is also a great product in a full deck removal and replacement. A radiant barrier could definitely help keep the home cooler in the summer time and warmer in the winter time; a definite benefit that represents value in terms of real $$$ being spent on cooling and heating. I noticed this video seemed to be installing OSB over the delaminated plywood. If so, that could be problematic if the home is being sold at a future point. If a home inspector sees rotted or delaminated plywood from inside the attic and points it out, or has a problem with new OSB, CDX or RTD being installed over delaminated plywood or bad 1x8 decking, it could be a difficult issue to resolve. Either way, if it’s delaminated plywood, I recommend full removal of the old delaminated plywood before OSB, CDX or RTD is applied. If installing OSB, CDX or RTD over 1X spaced decking, I recommend spot repairing the 1x decking where needed if its rotted, broken, split or large voided areas, and then install OSB, CDX or RTD over the spaced decking for a good solid nailing surface. It may only be cosmetic, but you don't want to have that conversation or debate after the fact. The point is, just don’t install good wood over bad wood. That could get you in trouble down the road. For those with the same phone number for 20-30 years, you don’t want those kind of phone calls or callbacks in the future. That could be a expensive nightmare. In our market 7/16" OSB $21, and 15/32" 3-Ply RTD $29, and 11/32" RTD $19, which is currently the least expensive way to go. Before Covid19, we also used 3/8" OSB to deck over existing 1x, which was the most affordable solution for those that needed a problem solved. However, I don't think 3/8" OSB is even being manufactured right now, due to the shortages of all other building materials, and I'm sure 7/16" OSB is the number seller for not only roof sheathing, but wall sheathing as well.
Can a person replace just a few boards with radiant boards, or does it have to be the entire roof?
They probably go overtop to avoid permits that may delay the project. It becomes a structural job
In Washington State they won't allow OSB installed on a new roof. If a OSB roof gets wet the edges will swell up and you'll see it through the roofing. If you do install CDX plywood make sure it's 5 ply, not 3 ply.
@scuddrunner1 - Why is 5 ply better than 3 ply?
I like Osb because price and live load strength due to multiple layers of alternating fibers and grains- like you said no sagging between 24” framing- however plywood has more racking strength to hold the framing together and pinch the nail-that’s why they require in high wind zones like Florida - another good video rock star
Thanks David, great points. I don’t understand why Florida prohibits OSB
a little bird told me you did a video from a roof!!! i had to see!!! very good video and great information. i agree with everything you said!!! love aged copper duration!!!! keep up the on scene roofing videos!!!
Thank you, appreciate it
$24 per sheet for 7/16 osb in new Hampshire. It was $12 per sheet two months ago
It will double again in the next few weeks, stock up
I have built alot of structures I would disagree with using osb , it sounds like your owb is so you can pad the cost more
Did anyone notice the chimney flashing? I'd like to know if you just caulked/tarred the flashing or if you cut into the brick and embedded it? As for the osb, plywood. It all depends on the sub-surface. Osb is fine for a second layer, but i have do e to many roofs here (the most northern part of NY) that osb just won't stand the test of time. My preferred is Advantech. I know its is a "OSB" but at least the tests stand up and it hold the weight of our snow loads vs standard OSB will fall apart
Yeah, I, also, wondered if they were planning to fix that flashing. There was no step flashing under the shingles either. Just one long piece.
I am a big fan of OSB are use it on all my mobile homes. I don’t know if you’ve ever seen my Mobile Home videos but I will share one with you I hope you don’t mind. A lot of people tell me that OSB is crap don’t you say blah blah blah I feel the same way as you do about it just took out my playlist on Mobile home roof
Thanks Drew! Appreciate feedback! Those who know, know!
1/2" OSB not that junk 7/16". Remember safety is number one priority
How thin was that 56 year old plywood? Plus that plywood looks like it was soaked for a long time..that's not from "baking".
OSB type products will be the future of sheathing and decking due to sustainability. OSB is cheaper to manufacturer and the raw materials, due to it being flakes of wood, is more readily available. As lumber prices increase over time, along with regulation, you will see osb become king and even synthetic decking materials become more prevalent.
Great video!
15/32 plywood $21.83 if you by more than 72 or $24.25 per sheet, and $14.90 for OSB,... Houston Tx, year 11/2022
very good video. thank you D
Glad you liked it!
What kind of training do you give your project manager and what does he do at the job?
He manages crew, checks quality, brings extra accessories if needed, documents everything. He is roofer by trade
I wish more builders would use 5/8" OSB. It makes a huge difference.
Agreed. Huge difference in performance, not only in roofing but overall
It is about time someone mentioned this. If your going to give someone OSB , at least give 5/8” . Cheer to you “thetruthrover”
Any time you need A new roof, you will need new sheeting, Both will roots over time, OSB will puncher in one spot,, PLY WOOD will sag over A wider spots, so when you reproof its better see what your options are & use the right wood.
$50.00 per sheet for OSB and 1/2" 5-ply PDX in the Bay Area.
Wow, it’s keep getting higher!
Do you finance a new roof Im in florida?
Last year about 82 a sheet for cdx
How thick is that Plywood that's flexing? 1/2' cdx 4-ply or 5/8" cdx with 24" centers and Plywood clips. Never had an issue with Plywood.
Fast forward 9 months now with plywood cheaper than OSB, guess which one is now better?
The issue with that plywood is it was not thick enough in the first place, 1/2 inch is not good , 5/8 inch and will never have an issue. Osb is trash turns to mush if it gets wet and molds, seen it way too many times .
Another main factor of plywood is how many Plies does it have 3 ply half inch CDX is a lot weaker than five ply CDX half inch
20$ plus in northern NY now
Around 12$ 4 months ago
Similar to other regions, I thought it would be more in NY
Yeah plywood went up here in buffalo ny
I sure prefer removing shingles from an osb deck because they basically fall out. Plywood holds better in Florida for hurricanes
sure if you selling the place and the excavator is idling outside ink dries it is in a bin then by all means use OSB
I had squirrels nest in my attic that chewed dinner-plate sized holes in the OSB. You could see the light shining through the vinyl siding. at the end of the roof. I hate squirrels.
Hate yourself instead - squirrels are non-thinking animals you are supposed to be a 'thinking' HUMAN - so do it!!!
Cdx on open studs and osb for resheet over barn board . Osb over studs is asking for problems
CDX > OSB in the PNW.
It’s rarely over 80 degrees out here and most homes are under 100-200 foot trees. It’s basically a temperate rain forest. OSB will hold moisture and bring in moisture ants sooner than CDX.
So maybe in hot temps, OSB > than CDX but in a temperate rain forest, CDX is more forgiving than OSB.
Portland, OR here. CDX all the way 🙌🙌🙌 PNW in the building.
OSB is $11 a sheet here plywood is 17 southeast North Carolina
osb is now 26.00 a sheet here and plywood is 32
,Dmitry, do you come to Toronto,Canada for roofing job?
1/2” CDX 5 ply plywood is the way to go in the Pacific NW.
You said OSB will help your shingles last longer? 5:15
Also, it's funny how you didn't mention the plywood on that roof is about 60 years old.
I am pretty sure you know this because I mention it.....
Also what was the thickness of the plywood? Looked pretty thin 3/8", maybe 1/2"? Our house used only 3/8". Hard to complain about a thin roof deck that lasted 60 years. The main problem with the plywood delamination was moisture penetration from letting the shingles go too long. Also much better products available today such ice and rain shield which greatly reduces the potential of moisture penetration & damage.
We use OSB products in Texas I prefer ZIP sheathing especially the ZIP R system but customers in our area enjoy the cost difference, we use 5/8’s and 7/16 OSB on almost every build even though OSB delaminates it doesn’t lose structural integrity from Texas Heat and the high humidity here as well, with radiant barrier on 7/16 decking it reduces attic temperatures up to 30% we don’t have a shortage here and avg cost is around $20/sheet which is about $7-8 higher than it was 6 months ago... CDX is not recommended is this area but some contractors live by it it’s about $27/sheet I’ve used both but I prefer OSB hands down if you’ve ever repaired roofs or done insurance damage work you would learn to love osb because it absorbs rain water and doesn’t hardly show the leaks in roofs plywood will flood your house even though plywood and osb are basically made the same way they are strands of wood glued together just in a different way OSB takes it for me!
ZIP is the way to go for roof decking!!! Great practice, we are considering it for all our roofing jobs but didn’t make the switch yet!
Roofing Insights it’s Expensive but we have switched over after @Matt Risinger put us on to the zip sheathing a couple years ago and haven’t looked back not every customer wants to pay the up charge for it but it’s so much more efficient and you can’t beat the R rating for it, or air tightness, especially in Texas with the high temperatures and moisture we have it does really well here!
If installing metal roof plywood isn’t worth a crap for screws. They will back out over time causing leaks. Better install purlins and make sure to screw purlins into wood truss or rafters. Just remember a chain is only as strong as its weakest link. Using screws to secure purlins to plywood would be The “weak link”
OSB IS $38. PLYWOOD $41 IN SOUTH FLORIDA
I prefer plywood over OSB for exterior sheeting since when OSB gets wet it doesn't hold screws or nails very good it does lose integrity from what I've seen if it gets wet both plywood and OSB shouldn't get wet OSB is much cheaper then plywood if you plan on using OSB use the Zip system it has a coating already applied to it.
7/16 OSB went from $11 to $22 in the last month in the Northeast.
But what about OSB getting wet vs. plywood?
It got pretty expensive here in Dallas, Tx. CDX Plywood - $24.72
OSB - $23.07 used to be $8.65.. (Edit) OSB is superior in my opinion for the long run.
What city are you from?
Roofing Insights Dallas. Specifically in Seagoville County
I just bought 15 sheets of plywood for $800 and they didn’t have much to chose from, ridiculous!
what thickness of osb for roofing?
Check local building code. 3/8 or 1/2
"OSB still sucks." -Dmitry Lipinskiy 2020
😂😂😂 good one
Amen!
Hey Dimitri I like your videos but I don't agree osb being better than plywood first reason if the plywood buckles lifts delaminates its because of bad ventilation remember a house has to have good intake vents on soffit if not on roof with ventsure inflow vents and if placing ridge vent close box or round vents, not canceling one or the other just causes obstruction with air flow so if the plywood is messed up its because they did a bad job in venting the roof of that's the case osb or plywood or even board decking will have a negative affect on the roof also osb getting wet makes the roof crumple plywood buckles but will hold mor that osb and nail seal tighter on plywood than osb .
Out side board
I got 60 sheets of plywood 19/32 For 28 a sheet in California
I live in California, I need A new roof, i got 17 squares
I've never tried, but I heard that zip system is a good solution.
we use OSB ONLY because the $$. Detroit metro AREA 7/16 & 1/2 around 9-13$ each. Also we NEVER go over TOP of all the bad plywood , IT'S AGAINST CODE HERE
Good prices, will be going up! Thanks for sharing
I agree that OSB is better than plywood. Both are not good when wet like you said. But CDX will curl real bad and OSB not that much. From: standing seam metal roofing contractor U.P. of Michigan. OSB currently going for $14 a sheet up here, not sure about Ply
OSB might be tolerable IF, IF, IF it doesn't get wet. If it gets wet, it is like a sponge and it turns into mush and you are screwed.
Plywood is stronger if you get 4 or 5 ply and it can withstand getting wet for a short period of time.
I have no knowledge of what happens when it is used in very hot climates; whether it delaminates.
I wouldnt use osb on a chicken coop! here in Oregon we all use cdx .......the only time we come across delamination is when under ventilated ....... Although I love Tearing off on OSB there's no prep ,the nails come right out with the shingles. Sorry Dimitri I usually agree with you but not on this one,and judging by the comments I'm not the only one .
Everyone has an opinion, thanks for sharing yours
I agree!
OSB is better for roofs because they can be strong enough to handle hurricanes or earthquakes but not always.
Both plywood and/or OSB roofing boards can break or fly away in either situation so quality does matter.
OSB triangle and those Nikes seem rather familiar I swear I’m looking into a mirror😎
OSB is garbage. They used it on all the roofs around here, and now I can count all the joists on the roofs from the outside. They also used it for the 2nd floors and they bounce like a trampoline. You walk into a bedroom and the furniture against the walls rattles around. The floors are lumpier than my front yard (and my yard is extremely lumpy) and the boards are all starting to make noise. The house we lived in for 30 years before had none of these issues and it was made with plywood. Still had the original roof.
$20 for 7/16th osb and $26 for 1/2 3ply
what about 6ply v 7/16 osb in you opinion? A buddy had 6ply all over slats on new roof...
Looks like prices went up. It will go up again very soon! Stock up
@@RoofingInsights3.0 Thanks for reply. I was hoping for an answer. I have soft spots on a existing 1973 plywood sheated plywood roof and getting F-wave and needed an opinion, not sure what"s better 3 or 6 ply. for patch jobs I'm not sure what is better to patch for the new roof... Cost is not really important for the few soft spots at the moment.
1/2 inch plywood is what they use on mobile homes. its not good use 5/8
OSB+IWS
OSB $17 plywood $28 Long Beach CA 7
8/7/22
Thank you for the video! Keep Roofing Keep Filming Keep Commentating!👍
Not a fan of OSB when CDX is the same price a sheet
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