Flat Industrial Roof - Roofing/Siding - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding


Thread Tools Display Modes
Old 05-27-2012, 09:13 AM   #1
Join Date: May 2012
Posts: 1
Rewards Points: 10

Flat Industrial Roof

We have about a 30 year old flat industrial roof. It appears to be decking covered in black tar mixed with gravel, and loose gravel on top of that. We have had leaks in the same general area over the past 15 years. We have had patches done where they scrape the loose gravel away, but over time the edges of the patches have cracked and the roof still leaks. We can not afford a new roof and so we have been getting proposals from roofing companies for a better, but cost effective solution. The entire roof is 12,000 sq. ft. The area of concern is about 2,000 sq. ft. The problem is they all disagree with each other. Company "A" says he can use liquid rubber, and mix the loose gravel back on top of it, to either patch over the multiple patches we already had done for about $2400, or go to the perimeter of the building to capture the front 5,000 sq. ft. area for about $4600. Company "B" says in the 5,000 sq.ft. area he would remove the loose gravel, torch down the black rolls of flashing and then coat it with the silver paint for about $7000. Company "C" says in the 5,000 sq.ft. area he would install a shingle like covering for about $8400. Company "A" says without the sub boards which we can not afford, the proposals from companies "B" and "C" would not work. Companies "B" and "C" say that the liquid rubber company "A" is proposing will not work as it will crack. What do you think is the best, most cost effective measure? Thank you!


timsb is offline   Reply With Quote
Old 05-27-2012, 09:24 AM   #2
Join Date: Feb 2012
Location: Utica, NY
Posts: 533
Rewards Points: 528

Scrape the gravel off and instal another couple of layers of BUR then put the gravel back over it.


framer52 is offline   Reply With Quote
Old 05-30-2012, 07:50 PM   #3
Remodeling Contractor
Join Date: Dec 2008
Location: Sandy Hook, CT
Posts: 3,590
Rewards Points: 2,000

A 3 lb closed cell spray foam roof is best. payback is 4 years or less when you consider the energy savings. These roofs come with a guarantee for 50 years to not leak or deteriorate which includes labor and materials. Maintenance is required which involves power washing and re-coating every 15 years. Cost is very close to $500 a square.
Bob Mariani is offline   Reply With Quote
Old 05-30-2012, 07:57 PM   #4
Join Date: May 2012
Posts: 7
Rewards Points: 10

The asphalt on you roof has run its coarse the oils in the asphalt have been drained by the elements in it's 30 year. You roof is now like a cracker, it will break apart by just walking on it , repairs at this point are useless for you will just be doing them every 6 months or so. If you only have 1 roof you can get an est. on a recovery roof. Remove all gravel and lay down a new roof over the old 1
Jc the roofer is offline   Reply With Quote
Old 06-05-2012, 11:37 AM   #5
Low Slope Roofing
Join Date: Jan 2011
Location: Nebraska
Posts: 1,451
Rewards Points: 114

Recover the whole roof if you can. Install 1/2 cover board and roof of your choice. A large repair will get you by for awhile but no idea how long. None of the proposals above are right. Droping a coating on it will not help. The proper fix would be to scrap the gravel off in the area, mop two or so plys on the area and re-gravel.
1985gt is offline   Reply With Quote

Thread Tools
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
extend roof over flat roof nate1582 Roofing/Siding 16 05-21-2012 11:35 AM
Blown Insulation - Flat roof AndrewF Roofing/Siding 1 12-31-2009 06:41 PM
Flat roof related questions christy123 Roofing/Siding 8 12-09-2008 11:30 PM
Flat roof headache The Barber Roofing/Siding 7 05-17-2008 05:48 PM
Flat roof addition - Joists connected to structure via legerboard?? Rhino17 Building & Construction 2 09-01-2007 06:56 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1