Single ply Dibiten or 2 ply App torch????

 
Thread Tools Search this Thread Display Modes
Old 09-23-2011, 09:30 AM   #1
Junior Member
 
RacerX's Avatar
 
Join Date: Sep 2011
Posts: 3
Default

Single ply Dibiten or 2 ply App torch????


I need advice for a flat roof that I re-framed to put 8" of pitch over 19ft into. I've been told that a single ply (base sheet, granulated cap) Dibiten torch system is better and last as long or longer than a 2 ply APP torch system (base sheet, smooth, granulated cap). I know that Dibiten is ALSO a torch down system! In my opinion, I would rather spend a little extra money and over kill it , rather than under kill and go with minimums. I live in Southern California, so ice and snow are NOT a problem!!!! But I do not want to mess with this roof for at least 20 -30 yrs!!! (We can hope it lasts this long!) Please. NO advice to go with a BUR (hot mop), PVC, or self sealing type system, I don't think that's going to work for me. So what do the experts think??? Oh, what is the best base for this?? I've been told 25lb, 40lb, 75lb and lay fast or similar type under layment of an SBS type nature. Most guys in my area are going with 25lb. I appreciate all opinions and advice!!

RacerX is offline  
Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ContractorTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

Old 09-23-2011, 11:15 AM   #2
Senior Member
 
1985gt's Avatar
 
Trade: Commercial/Anything with little to no slope.
Join Date: Dec 2010
Location: Nebraska
Posts: 866
Default

Re: Single ply Dibiten or 2 ply App torch????


Hot mop with a cap sheet. nail a base, mop 3 felts and granulated mod bit. That or a PVC. Seriously you said you would pay more for a better roof and these two are it. Although to be honest a BUR(nailed base 3ply felt and rock) Would be better then a granulated cap sheet but Im guessing your going for looks since its on your home. I'm and expert and thats what I think. Not sure why you don't think these other systems wont work for you. All are very adaptable to any area.
1985gt is offline  
Old 09-23-2011, 11:38 AM   #3
Roofing Relapse
 
Grumpy's Avatar
 
Join Date: Oct 2008
Location: Chicago, IL
Posts: 2,535
Default

Re: Single ply Dibiten or 2 ply App torch????


PVC, faster, easier, cleaner and since you are in a sun area also highly reflective.

base sheet + a granulated cap is not a single ply. GAH I hate it when people call modified bitumen single ply. It's obviously 2 plys, the base and the cap. That's two ply, not single ply. I have gotten in verbal fights with many an architect about this.


I'm not a fan of hot tar although it is a great roof.
__________________
-Grumpy
Chicago Gutters Chicago Roofing
Grumpy is offline  
Old 09-23-2011, 01:13 PM   #4
Junior Member
 
RacerX's Avatar
 
Join Date: Sep 2011
Posts: 3
Default

Re: Single ply Dibiten or 2 ply App torch????


Thanks for the advice. As far as PVC, WAY TOO EXPENSIVE, almost double the cost. I had a hot mop on there originally but the moron roofer didn't use asphalt primer on the edge metal, so water was wicking in from the bottom edge and it destroyed all the plywood and the fascia. Through my research, it appears to me that a modified type system is better than a BUR/Hot Mop. I know that you can also get a modified system with Hot Mop as well. As far as the # of ply's goes, I was under the same assumption, but I've had more than one roofer tell me otherwise! I always thought that the base was considered a ply. Anyways I've decided to go with a base sheet, smooth torch and then cap torch. I would call this a 3 ply system, but like I said, some roofers would still call it a 2 ply system!! LOL LOL This whole process has been agonizing. I've probably met a half dozen roofers and NOBODY has said the same thing. Also there was no consistency in the bids either, low of about $2200 all the way to $7100 for the same type of systems. All the roofers were licensed and have been in business 17yrs or more! I didn't think that I would have to learn how to do there job in order for me to get the right system and also to know what they were telling was correct. But I trusted someone the last time and unfortunately it didn't work out and now I am re-doing the roof again. But I am a little wiser this time. LOL LOL

Last edited by RacerX; 09-23-2011 at 01:18 PM.
RacerX is offline  
Old 09-23-2011, 02:22 PM   #5
Roofing Relapse
 
Grumpy's Avatar
 
Join Date: Oct 2008
Location: Chicago, IL
Posts: 2,535
Default

Re: Single ply Dibiten or 2 ply App torch????


Nope. It shouldn't be double the cost apples to apples. If you are comparing a 20 year modified or hot tar specification to a 20 year PVC specification the PVC should be cheaper. Now if youa re comparing a 10 year or 15 year specification to a 30 year specification well obviously that's not apples to apples. And if you are considering a 10 or 12 year specification on your roof, think again, that'd be ill-advised.


I don't think many peopel woudl agree modified is a better system. I do not install hot and do isntall modofied on request, and I think hot is a much better roof than modified.


here are two reads you should consider reading which may make your decision easier... Hire your Contractor and Flat Roofing Options
__________________
-Grumpy
Chicago Gutters Chicago Roofing
Grumpy is offline  
Old 09-23-2011, 05:45 PM   #6
Junior Member
 
RacerX's Avatar
 
Join Date: Sep 2011
Posts: 3
Default

Re: Single ply Dibiten or 2 ply App torch????


Thanks for the reads Grumpy. I've read articles very similar in the past. Where I am, there are few installers of PVC, so right off the bat competition is less, price usually higher. If I used a base and single ply of Dibiten, warranty is 20 yrs. Cost $2900. However, a single ply PVC system, cost is about $5800, BUT it carries a lifetime warranty in residential applications. I would like to go with the PVC, but my finances won't allow it. On the other hand, if I go with a couple of other big name brands, ie GAF, Certainteed and I think there is one more, a base, smooth and cap torch, the warranty can be as high as 20 yrs. Price about the same as the single Dibiten. I appreciate everyones opinion and advice. It make the decision a little easier to make.
RacerX is offline  
Old 09-24-2011, 07:28 AM   #7
Senior Member
 
1985gt's Avatar
 
Trade: Commercial/Anything with little to no slope.
Join Date: Dec 2010
Location: Nebraska
Posts: 866
Default

Re: Single ply Dibiten or 2 ply App torch????


The person who installed that but did it wrong. Even if they didn't put primer on the metal the felts underneath should have wraped over the edge of the fascia. Any roofing system is only as good as the installer. Have you thought about EPDM you can get it in white also. Torch downs are good roofs don't get me wrong but we haven't installed on in 10 or more years. Too much liability others say hot is to much liability but your guys prefer the hot system. His big is this roof?
1985gt is offline  
Old 09-24-2011, 09:40 AM   #8
Roofing Relapse
 
Grumpy's Avatar
 
Join Date: Oct 2008
Location: Chicago, IL
Posts: 2,535
Default

Re: Single ply Dibiten or 2 ply App torch????


Quote:
Originally Posted by RacerX View Post
Where I am, there are few installers of PVC, so right off the bat competition is less, price usually higher.
Exactly why we are specializing in single plys. Too many hacks buying modifiued from home depo and killing that market. Plus the liability.
__________________
-Grumpy
Chicago Gutters Chicago Roofing
Grumpy is offline  
Old 09-24-2011, 09:42 AM   #9
Roofing Relapse
 
Grumpy's Avatar
 
Join Date: Oct 2008
Location: Chicago, IL
Posts: 2,535
Default

Re: Single ply Dibiten or 2 ply App torch????


Quote:
Originally Posted by 1985gt View Post
The person who installed that but did it wrong. Even if they didn't put primer on the metal the felts underneath should have wraped over the edge of the fascia. Any roofing system is only as good as the installer.
Yes, a very very common problem I see from ALL roofing systems is improper edge detail. It takes longer and takes more material to properly treat the edge. Hmmm I wonder why it gets so neglected. LOL


We do very little torch work anymore and don't do hot. The reason? Liability, insurance, etc... Which has a higher liability? I don't want to find out
__________________
-Grumpy
Chicago Gutters Chicago Roofing
Grumpy is offline  
Old 09-26-2011, 09:59 AM   #10
Senior Member
 
1985gt's Avatar
 
Trade: Commercial/Anything with little to no slope.
Join Date: Dec 2010
Location: Nebraska
Posts: 866
Default

Re: Single ply Dibiten or 2 ply App torch????


Quote:
Originally Posted by Grumpy View Post
We do very little torch work anymore and don't do hot. The reason? Liability, insurance, etc... Which has a higher liability? I don't want to find out

Thats easy Torch harder to burn down a building with hot asphalt compared to a open flame.
1985gt is offline  


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Single-Ply Membrane Pricing... Tropical Roofing General Roofing Discussion 18 01-25-2012 11:41 AM
Single Ply Calculator? restoration101 Commercial Roofing 1 08-11-2011 12:51 PM
SPF and torch down bacon8685 Commercial Roofing 28 05-14-2011 01:09 AM
torch granulated joe Commercial Roofing 5 04-28-2011 09:31 AM
Sealing torch on to existing 4-ply Graves Commercial Roofing 14 09-29-2009 05:58 PM

Join Now... It's Fast and FREE!

Privacy Badge
I am a professional contractor
I am a DIY Homeowner
ContractorTalk.com is for
PROFESSIONAL CONTRACTORS ONLY!

At ContractorTalk.com we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created www.DIYChatroom.com DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

Redirecing in 10 seconds
No Thanks
terms of service

Already Have an Account?


Content Relevant URLs by vBSEO 3.6.1