I just bought a country home and I inherited a 1992 Terry Resort which overall is in great condition bu he washroom ceiling is caved in a bit and also the front master bedroom, so I have to choice but to rip the roof open and see what repairs are required. This time lapse is great as I also plunge into this adventure!
I like this video! I want to add solar to my 2014 coachmen clipper ice 18', and I am trying to understand the roof framing so I can adequately secure the solar on the roof. This clip saved others as well as I a lot of time. Thank you for taking the time to create this video!
What materials did you use? I see it had particle board to begin with. Then you replaced with plywood? And then another layer? And some glue? And the final sheet?
nice vid. im replacin the tpo on mine now and after removing the old material I noticed there is alot of sticky glue residue on the osb and now a bunch of dust and particulates from removing the old material stuck to that now. what did you use to remove tat stuff before laying down the new glue and roof material?
How hard was it to get all the creases out of the top? Did you put butyl tape on the trim before you screwed it over the sides and front and back of roof material? Thanks for sharing such a great video!
You smooth the creases out as you roll the rubber on, there may be some that wont come out, but once its sat in the sun for a while they will usually shrink away. And yes butyl tape is used under all trim and roof fixtures. Thanks for watching
curious.. what is the yellow aerosol you are using for the edged of the trailer right before you put the gorilla tape. does anyone know what it is and why they are using it?
Good question, from the factory the rubber is glued to the OSB and when you remove the old rubber it inevitably pulls up chucks of the wood, leaving a jagged surface that can tear the new membrane. Putting the luan over the top leaves a smooth surface to adhere the new membrane to, as well as adds strength and insulation to the roof. Thanks for watching
@@NoizyFilmsCollier Thanks. Makes perfect sense now. I had someone give me a quote to replace my roof and they said they were going to cover the entire roof with luan. After watching some videos and doing some research I think I will replace the roof myself. Thanks for the video and info.
When you pull the old membrane off it tears the wood off the old decking. That will show when you install the new membrane...it will be a rough surface. So it could potentially damage the new membrane. The luan makes for a nice smooth surface and cosmetically pleasing. I hope this helps, thanks for the feedback.
Why don't you use spray in bedliner on your roof. That's really some tough stuff you can't get it off once you get it on and I don't think it would ever leak. And you can get it in colors other than black.
I'd love to see it done and know how well it works, the only problem I can imagine is cracking from being to rigid as the RV expands and contracts with temperature change.
It doesn't work. Cracks easily in the sun, even under a thick tarp. I have a Coleman pop-up where the previous owner tried that. It's now unusable until I completely replace the entire molded roof.
It depends on the roof material that the manufacturer used, we try to go back with the same stuff, its usually R-13 for the insulation and we typically use 1/8th in Lauan on top of the plywood. A PVC membrane is what we recommend for the rubber replacement. Thank you for watching and commenting. Stay tuned!
Best insulation is not fiberglass batting which can collect moisture and get moldy. Use Black Sheep Wool batting instead. Eco friendly, no mold, superior warmth. Also add Polyiso or XPS insulation which are foil covered closed cell foam boards with very high insulating properties you can buy at Home Depot.
@@spamtreg7693 That's interesting, did not know that. Why are some of the best van makers using it on their floors? Its for preventing cold under the van, not heat from sun.
NoizyFilms Collier one last question because I plan to replace my roof and I’m new to it so I was just wondering what materials did you order in completing this project? Thank you
@@timcrew3557 it depends alot on what you have to start with, how much of the roof your replacing. You can find roof replacement kits that will have the proper sealants and tapes. It's a hard question to answer without more details
NoizyFilms Collier my plan is to really replace the whole roof because I have a big hole on one end and I know for a fact that the wood under it is bad
Search for RV roof replacement kit on Amazon and pick out one for you're length for you're RV that will get you a great start. Then you just need decking, and screws and so on
Was the trim able to screw into osb or did it screw into the truss running the length of Rv? Also did you place thin layer of wood down for a smoother bonding for the adhesive and rubber roof?
It makes me super nervous walking on the roof on mine as it sags and cracks under my 185 weight. I see your's sagging, how were you ok with working on the roof?
Anytime you get on the roof, its dangerous. Be very careful. Ive seen people fall thru and off. One of our customers lost his life falling off of his 5th wheel. Pls use an abundance of caution
NoizyFilms Collier dude thank you so much for the reply. I’ve been told that it’s a good idea also to use maybe a 3x3 plywood to even distribute the weight. It definitely freaks me out being up there but my camper really needs work
First of all no, You cannot apply the liquid rubber directly to the wooden surface. Second, I would advise against the liquid rubber in the first place. Unless you're roof is just beyond repair and or not worth fixing correctly. The problem is once you use the liquid it makes future repairs more difficult and leaks much harder to find, and typically any repair means re-coating the whole roof
Alot of questions are addressed in the comments, including this one. Pls feel free to look them over. You may also find answers to questions you didn't think of. The answer to you're question is gorilla tape. Thanks for watching
At 2:01, the man in green shirt is applying a silver/shiny tape. What is it and for what reason ...covering screws ? It looks different from the black Gorilla tape at the seams. JwgK Houston
The aluminum tape was only used over flush mounted screw heads for extra protection, where as the gorilla tape was used on the wood seams with tend to protrude more
@@NoizyFilmsCollier Thanks....I currently have my toy hauler in the shop due to roof hail damage which led to water ingress and plywood separation. Now I am having a difficult time sourcing 4 x 10 plywood. I like the idea of OSB underlayment and glued lauan as a smooth layer before gluing the EPDM. I was originally thinking of using 3/8" ply but may have to do the 2 wood layer application. Would it make much difference if you used the Gorilla tape over all the screw strips ? I have access to both types of tape. JwgK
Why dont they use AdvanTech plywood its tongue and groove and uill last for 50 years and it seems the glue is not hilding and the putty they stick on the trim I have used it before and it dose not stick so great I use Black EPDM Coverstrip Seam Cover Tape, 5 in. wide and cut it down to the size needed once you put that on your gunna play hell getting it off so befor you roll out your rool put it around all the openings and under the frunf cap to hold the frunt of the rool then use your tubes of self leveling roof and put the cap back on or use a rool one peace as long as the bus of aluminum roofing and dont be stingy with the glue then build mold's of thr roof after you lay the roof put the mold down on it and put pressure down on it all 4 corners do the hole roof let it relly bake and cure in for 24 hours then put all your trim back on.But if you can pull it off that so eazy what is wind going to do at 70 mph with a head wing of 40 mph going to do . you say that it only good for 10 years American companies use to build a hell of a lot better than that and they had good qulity and took pride in their work they built things to last 50 years . a lot of companies do noy even put under coating pickups trucks cost 70 to 100 thousand now prices are to high they have never helped Americand they raise then the cost of living gos up higher then the increas in wages becaus of the fed they could have left it at 5 bucks a hour as minimum wageand lowered the cost of living across the country so a person starting off could pay rent on a one room apartment gas and food on that wage and make people work and learn to get rasies but you pople are nut's or stupid you could put a flat tax on every item now they base things off someones credit ratting if they have bad credit they pay more you talk to about discrimination sorry about going on but I am sick of our government the communist democrats and the just going for the ride republicans letting our country go to the crapper
The supplies are well over $1000 the membrane kit alone is almost $500 then you figure wood, screws, sealant, tape, insulation. Miscellaneous wiring supplies, etc. Not to mention tools if you are not already equipped and without experience mistakes are almost a certainty, which will cause added expenses. Even a do-it-yourselfer will have some significant cost to complete this project correctly.
That can change daily and is also dependent on what RV you have, how long it is, and how much is necessary to replace given the damage. I would love to give you a ball park put it's going to vary so much that you really need an estimate done for your specific case. Thanks for your questions!
Trailers are made with cheapest weakest wood. Why use OSB plywood?? You see what happens when moisture hits it ? Swells and molds. This was a waste of time and money. Real plywood 5/8 is heavy duty. Cost alot money that's why cheap people do it this way with OSB glue chips wood. . this new roof wood will be fine till roof leaks and the same will happen as before. When you renovate or rebuild , it is WISE to over build and make better than before. Other wise your just wase time really.
@@mikegracia1475 if installed PROPERLY EPDM is great systym. Unfortunately people make mistakes with caulking and sealing around utilities on roof. It's the small stuff but it ends up being cause of water getting into RV. Seams and cut outs along the roof need to be sealed with proper compounds applied. I see many EPDM roofs that leak because someone got up there with caulking or roofing cement and make a mess really make it worse . EPDM is one of best systym for rv IF done properly and even at factory they install it all wrong
@@eddiespagetti8395 what would you use under the epdm rather than OSB? Marina ply perhaps? Will be doing a similar job myself soon, but will get a friend to help me (he's a builder by trade and has done epdm roofs a fair bit I think).
@@mikegracia1475 Thick plywood the thicker the better and that marine plywood is great to use. Costs triple the amount over particle OSB crap board is a joke. Rvs are so weak made so weak unless you customize it yourself with better wood which adds weight but still better than build with osb. People need to check RV scrap yards. See just how weak and poorly built rvs are
Looks like you will be doing this again in year. You need to put weather protection between inner and outer shell! Our class C was thrown together by Thor motorcouch company, had it for five and a half years and the roof rotted. Don't buy anything from Thor motorcouch company, fly by night throw together, no integrity! So good luck with your project.
This was the most gratifying video I've ever seen, to the guys that did this work...WOW!!!! I'm taking notes.
Agrees w/starfireentertainmentbeats! 👍
finally, folks who know how to put a vid together, all fast forward, no jabber jaw.
Couldn't agree more!!
The music is terrible tho
I just bought a country home and I inherited a 1992 Terry Resort which overall is in great condition bu he washroom ceiling is caved in a bit and also the front master bedroom, so I have to choice but to rip the roof open and see what repairs are required. This time lapse is great as I also plunge into this adventure!
Dude awesome job! I’m am replacing the rear 8 feet of my 38 ft sand piper this weekend (rafters and all)
This video was good for motivation!
How'd that go??
Would you by chance have a detailed list of everything you used
I'm guessing that's a no
@@bryanshafer9524 doesn't look like it
I like this video! I want to add solar to my 2014 coachmen clipper ice 18', and I am trying to understand the roof framing so I can adequately secure the solar on the roof. This clip saved others as well as I a lot of time. Thank you for taking the time to create this video!
Nice work. Thanks for a great video!
Amazing video so helpful and motivating . I'm trying to fix up a 5th wheel for me, gf, and 3 yr old son. I know I can do this now
My my suggestion is to next time, you should start the second plywood with a half wide sheet. This way it alternates the seams.
Beautiful!
awesome video!! other vlogers would spend months doing this kind of work !
Awesome work Awesome video my friend.
These guys are the real deal!
man only word i have is
"PROFESIONAL"
Wow great work i was debating on doing mine
Awesome video. Thank you
Your welcome and thank you for watching. More to come
can you list all the materials used ❤ love this video yall did an outstanding job 👏
It’s not a matter of if a rv roof will leak, but more of a question of when it will leak.
😀👍Good Stuff, Great Tips
Good job. Wow. You guys work fast. Lol.
Git ‘er done! Way to go guys.
Thank you for this video! I’ve been looking for a video like this! Nice work can’t wait to work on mine!
That looks nice!!!
Makes me glad I have all aluminum Quicksilver trailer no bs like this to worry about ever.
@Alex Omar Nope, not with insulated barrier between axle and frame.
Wow ty for sharing
What materials did you use? I see it had particle board to begin with. Then you replaced with plywood? And then another layer? And some glue? And the final sheet?
nice vid. im replacin the tpo on mine now and after removing the old material I noticed there is alot of sticky glue residue on the osb and now a bunch of dust and particulates from removing the old material stuck to that now. what did you use to remove tat stuff before laying down the new glue and roof material?
Wow pay this dude by the hour and it only cost 5 bucks for all this work he is Fucken fast
Joe Torres- yes sir, I’m a mobile tech also and the faster you get shit done the more money you make!!!!!
What would i expect to pay for a tech to do this job.
Badass 🇺🇸
vapor barrier on insulation goes to the inside not the outside
What type of plywood did you use ? I have trailer 30 foot by 8’9”
How hard was it to get all the creases out of the top? Did you put butyl tape on the trim before you screwed it over the sides and front and back of roof material? Thanks for sharing such a great video!
You smooth the creases out as you roll the rubber on, there may be some that wont come out, but once its sat in the sun for a while they will usually shrink away. And yes butyl tape is used under all trim and roof fixtures. Thanks for watching
What type of rubber did you use on the roof
If I ever have to do this, I am going with a diamond plate and bedliner!
Is that shuttering ply, then thinner plywood over the top, then EPDM final coating? Or?
curious.. what is the yellow aerosol you are using for the edged of the trailer right before you put the gorilla tape. does anyone know what it is and why they are using it?
1/4 or 7/16 OSB? I have 1/4, want replace with 7/16 and luan just worried about weight and my siding not being flush to top of new boards.
After seeing a bunch of these videos I am convinced that RV’s/5th wheels, are disposable.
That's why they are so cheap used.
What size of plywood did you use
I know it was 5 years ago but how much did that cost you Then I will just double it LOL
I’m looking to do a complete Reno on a 2001 Aljo cch travel trailer and wouldn’t mind getting in contact with you guys for some insights.
OSB? You would think it would be an exterior grade 3 quarter-inch plywood.
What is that roll of stuff you added on there ?
Was it a superflex rubber roof? I see that is different than epdm roofs.
It is a PVC material. Much more durable and repairs easily
What did you use for the seams on the plywood
Just curious but why add the luan over the top of the osb if it wasn't that way from the factory?
Good question, from the factory the rubber is glued to the OSB and when you remove the old rubber it inevitably pulls up chucks of the wood, leaving a jagged surface that can tear the new membrane. Putting the luan over the top leaves a smooth surface to adhere the new membrane to, as well as adds strength and insulation to the roof. Thanks for watching
@@NoizyFilmsCollier Thanks. Makes perfect sense now. I had someone give me a quote to replace my roof and they said they were going to cover the entire roof with luan. After watching some videos and doing some research I think I will replace the roof myself. Thanks for the video and info.
When you pull the old membrane off it tears the wood off the old decking. That will show when you install the new membrane...it will be a rough surface. So it could potentially damage the new membrane. The luan makes for a nice smooth surface and cosmetically pleasing. I hope this helps, thanks for the feedback.
Shit didn't see the question was already answered...
@@joecollier9445 yeah I take care of my audience lol thank you for participating
Why don't you use spray in bedliner on your roof. That's really some tough stuff you can't get it off once you get it on and I don't think it would ever leak. And you can get it in colors other than black.
I'd love to see it done and know how well it works, the only problem I can imagine is cracking from being to rigid as the RV expands and contracts with temperature change.
It doesn't work. Cracks easily in the sun, even under a thick tarp. I have a Coleman pop-up where the previous owner tried that. It's now unusable until I completely replace the entire molded roof.
How much should I expect to pay to get the roof replaced on my 31ft trailer?
I need to replace mine as well
4,000
I would love to know how much that would cost, even if it was four years ago
How much did the whole thing cost ? I Recently Got a Motor Home ??
Where do you buy the whole material for the roof
Amazon has great deals
What were the “tapes” running across and what is there function?
It's actually to keep the roof material protected against sharp edges and screw heads
Glad they had the money to do it.. shit... good job though guys
Info on what stuff you used?
what kind of tape did you use on the seams and edges?
Gorilla tape. Thanks for watching
CAn you tell me the process of the new roof? Like insulation- what type, plywood- what thickness, and so on? Great job on the new roof.
It depends on the roof material that the manufacturer used, we try to go back with the same stuff, its usually R-13 for the insulation and we typically use 1/8th in Lauan on top of the plywood. A PVC membrane is what we recommend for the rubber replacement.
Thank you for watching and commenting. Stay tuned!
Best insulation is not fiberglass batting which can collect moisture and get moldy. Use Black Sheep Wool batting instead. Eco friendly, no mold, superior warmth. Also add Polyiso or XPS insulation which are foil covered closed cell foam boards with very high insulating properties you can buy at Home Depot.
@@lass-inangeles7564 - The Polyiso is not good for cold weather. The R-value drops drastically, the colder it gets.
@@spamtreg7693 That's interesting, did not know that. Why are some of the best van makers using it on their floors? Its for preventing cold under the van, not heat from sun.
Where’ or what website did you go to order all of the materials you needed to fix your roof
Amazon is a great resource for do it yourselfers
NoizyFilms Collier one last question because I plan to replace my roof and I’m new to it so I was just wondering what materials did you order in completing this project?
Thank you
@@timcrew3557 it depends alot on what you have to start with, how much of the roof your replacing. You can find roof replacement kits that will have the proper sealants and tapes. It's a hard question to answer without more details
NoizyFilms Collier my plan is to really replace the whole roof because I have a big hole on one end and I know for a fact that the wood under it is bad
Search for RV roof replacement kit on Amazon and pick out one for you're length for you're RV that will get you a great start. Then you just need decking, and screws and so on
Why the 2nd thin layer of plywood?
Was the trim able to screw into osb or did it screw into the truss running the length of Rv?
Also did you place thin layer of wood down for a smoother bonding for the adhesive and rubber roof?
?
Wow, that's amazing video!!! You sure earn your money doing that!!! Nice job!!! Really, fast, Ha Ha!!! Really how long does it take???
That video was shot over the course of 48 hrs or so, thanks for watching!
what was that you put on top of ply wood
1/8 inch luan
It makes me super nervous walking on the roof on mine as it sags and cracks under my 185 weight. I see your's sagging, how were you ok with working on the roof?
Anytime you get on the roof, its dangerous. Be very careful. Ive seen people fall thru and off. One of our customers lost his life falling off of his 5th wheel. Pls use an abundance of caution
NoizyFilms Collier dude thank you so much for the reply. I’ve been told that it’s a good idea also to use maybe a 3x3 plywood to even distribute the weight. It definitely freaks me out being up there but my camper really needs work
@@NoizyFilmsCollier could you use scafolding along the side to work on the roof, I would think that would be s.afer
Are you able to apply a liquid roof material over the plywood or do you have to put down the rubber membran first ?
First of all no, You cannot apply the liquid rubber directly to the wooden surface. Second, I would advise against the liquid rubber in the first place. Unless you're roof is just beyond repair and or not worth fixing correctly. The problem is once you use the liquid it makes future repairs more difficult and leaks much harder to find, and typically any repair means re-coating the whole roof
why not water proof material ?
Cuáles son los materiales?What are the materials, in details
What did this cost? Was this service professionals or you did this yourself?
We are professionals
How much would a job like this normally cost? Curious if mine is worth saving. I don't have that many guys available o help.
Bill
3400.00 lowend
Why did they run tape every foot ? anybody know ? I know the tape at the joints but the other ???
Anywhere we laid tape was extra protection from hard edges that may eventually wear through the rubber.
Thanks for watching!
What’s the name of the white paper you layed down on top last?
Pvc membrane
What type of tape did you use on the seams?
Alot of questions are addressed in the comments, including this one. Pls feel free to look them over. You may also find answers to questions you didn't think of. The answer to you're question is gorilla tape. Thanks for watching
@@NoizyFilmsCollier I was going to ask the same thing, I can't find the answer in any older comments or replies.....
@@NoizyFilmsCollier should have put all materials used in the description.
Where you buy the roofing?
Amazon
You guys for hire??
You guys work out of Texas?
Sorry, pretty much only Georgia
now that better then ome
So what are the steps
TIME? How much time you needed to replace it?
Average is about 40 hrs of labor
Our chipboard roof is rotten so we’ll pull it up and replace it with… chipboard. Hahahahaha! ‘Mericans….
Looks like an EPDM coating on top though... Which should be good for, hmmm 30 to 50 years.
At 2:01, the man in green shirt is applying a silver/shiny tape. What is it and for what reason ...covering screws ? It looks different from the black Gorilla tape at the seams. JwgK Houston
The aluminum tape was only used over flush mounted screw heads for extra protection, where as the gorilla tape was used on the wood seams with tend to protrude more
@@NoizyFilmsCollier Thanks....I currently have my toy hauler in the shop due to roof hail damage which led to water ingress and plywood separation. Now I am having a difficult time sourcing 4 x 10 plywood. I like the idea of OSB underlayment and glued lauan as a smooth layer before gluing the EPDM. I was originally thinking of using 3/8" ply but may have to do the 2 wood layer application. Would it make much difference if you used the Gorilla tape over all the screw strips ? I have access to both types of tape. JwgK
Using all gorilla tape is fine. Its just more expensive, but adds more protection
@@NoizyFilmsCollier what is the name of the aluminium tape please?
I don't understand why you didn't replace the bathroom light dome. They are not expensive. About $80
Looks like you didn’t let the glue cure before you rolled the membrane on.
It was cured. Dont forget its sped up!
@@NoizyFilmsCollier what glue did you use please?
Wood is SO gross for RVs, I love my all Aluminum roof.
what can I expect to pay for materials if I attempt this myself, ballpark? ty
Master Armedforces depends on size of camper and extent of damage. $600+ is a good ballpark though.
Why dont they use AdvanTech plywood its tongue and groove and uill last for 50 years and it seems the glue is not hilding and the putty they stick on the trim I have used it before and it dose not stick so great I use Black EPDM Coverstrip Seam Cover Tape, 5 in. wide and cut it down to the size needed once you put that on your gunna play hell getting it off so befor you roll out your rool put it around all the openings and under the frunf cap to hold the frunt of the rool then use your tubes of self leveling roof and put the cap back on or use a rool one peace as long as the bus of aluminum roofing and dont be stingy with the glue then build mold's of thr roof after you lay the roof put the mold down on it and put pressure down on it all 4 corners do the hole roof let it relly bake and cure in for 24 hours then put all your trim back on.But if you can pull it off that so eazy what is wind going to do at 70 mph with a head wing of 40 mph going to do . you say that it only good for 10 years American companies use to build a hell of a lot better than that and they had good qulity and took pride in their work they built things to last 50 years . a lot of companies do noy even put under coating pickups trucks cost 70 to 100 thousand now prices are to high they have never helped Americand they raise then the cost of living gos up higher then the increas in wages becaus of the fed they could have left it at 5 bucks a hour as minimum wageand lowered the cost of living across the country so a person starting off could pay rent on a one room apartment gas and food on that wage and make people work and learn to get rasies but you pople are nut's or stupid you could put a flat tax on every item now they base things off someones credit ratting if they have bad credit they pay more you talk to about discrimination sorry about going on but I am sick of our government the communist democrats and the just going for the ride republicans letting our country go to the crapper
😳🥁
Should have replaced insulation....not a short cut that pays in the end
Watch the video again my friend, the insulation was replaced, dont blink! You'll miss it!
@@NoizyFilmsCollier lmfao. Dooooon't blink ...or you just might miss the insulation being removed. Don't blink. Country song
Kick ass video. Tell me if I am right. 2 grand?
He said about $600
Absolutely more than $600. This particular job cost the owner closer to $8k
The supplies are well over $1000 the membrane kit alone is almost $500 then you figure wood, screws, sealant, tape, insulation. Miscellaneous wiring supplies, etc. Not to mention tools if you are not already equipped and without experience mistakes are almost a certainty, which will cause added expenses. Even a do-it-yourselfer will have some significant cost to complete this project correctly.
Meanwhile 2 years later ,Cha-Ching$$$ Seen a can of spray paint now over 11 bucks ! Crazy !
Hello can I pay you guys to fix my roof?
How much did it cost to do that
Avarage is about 40 hours, so multiply that by your technicians hourly rate and add materials
How much was materials
That can change daily and is also dependent on what RV you have, how long it is, and how much is necessary to replace given the damage. I would love to give you a ball park put it's going to vary so much that you really need an estimate done for your specific case. Thanks for your questions!
@Spiritdove this particular job was roughly $8,000 complete
@@NoizyFilmsCollier jesus. I thought it was roughly $600 in material?
I tell you the truth that I have seen several manufactures that do NOT tape the seams.
Trailers are made with cheapest weakest wood. Why use OSB plywood?? You see what happens when moisture hits it ? Swells and molds. This was a waste of time and money. Real plywood 5/8 is heavy duty. Cost alot money that's why cheap people do it this way with OSB glue chips wood. . this new roof wood will be fine till roof leaks and the same will happen as before. When you renovate or rebuild , it is WISE to over build and make better than before. Other wise your just wase time really.
doesn't EPDM last like 30 to 50 years though? What would you use instead?
@@mikegracia1475 if installed PROPERLY EPDM is great systym. Unfortunately people make mistakes with caulking and sealing around utilities on roof. It's the small stuff but it ends up being cause of water getting into RV. Seams and cut outs along the roof need to be sealed with proper compounds applied. I see many EPDM roofs that leak because someone got up there with caulking or roofing cement and make a mess really make it worse . EPDM is one of best systym for rv IF done properly and even at factory they install it all wrong
@@eddiespagetti8395 what would you use under the epdm rather than OSB? Marina ply perhaps?
Will be doing a similar job myself soon, but will get a friend to help me (he's a builder by trade and has done epdm roofs a fair bit I think).
@@mikegracia1475 Thick plywood the thicker the better and that marine plywood is great to use. Costs triple the amount over particle OSB crap board is a joke. Rvs are so weak made so weak unless you customize it yourself with better wood which adds weight but still better than build with osb. People need to check RV scrap yards. See just how weak and poorly built rvs are
Looks like you will be doing this again in year. You need to put weather protection between inner and outer shell! Our class C was thrown together by Thor motorcouch company, had it for five and a half years and the roof rotted. Don't buy anything from Thor motorcouch company, fly by night throw together, no integrity! So good luck with your project.
Gluing down that roll of supposed protecting is like putting a bloody bandaid on a wound.