Roof Removal

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Author Message Ralph Liebing, RA, CSI Senior Member Username: rliebing Post Number: 1024 Registered: 02-2003 Posted on Monday, July 27, 2009 - 10:06 am:    What test[s] do you suggest, recommend, require, specify or know about that should be performed prior to roof removal? Thanks Lynn Javoroski CSI CCS LEEDŽ AP SCIP Affiliate Senior Member Username: lynn_javoroski Post Number: 910 Registered: 07-2002 Posted on Monday, July 27, 2009 - 10:17 am:    Test the flashings (especially) for asbestos. John Bunzick, CCS, CCCA, LEED AP Senior Member Username: bunzick Post Number: 1071 Registered: 03-2002 Posted on Monday, July 27, 2009 - 12:14 pm:    If the entire assembly is to be removed, I'm concerned primarily with asbestos. If the insulation is to remain, I'd do an infrared for moisture. In addition, for testing during construction, I will specify fastener pull-out tests by the contractor; and verification of roof drain function (prior to tear-off)--if the drains are later clogged the contractor "owns" repair. We also may need to conduct observations of the existing deck for corrosion. Lynn Javoroski CSI CCS LEEDŽ AP SCIP Affiliate Senior Member Username: lynn_javoroski Post Number: 911 Registered: 07-2002 Posted on Monday, July 27, 2009 - 12:38 pm:    What's the reason for the removal? Has the existing roof failed? Depending on the scope of the failure, you may have the answers to some of the questions already. If it's a partial tear-off because you're adding equipment or an addition, that's a different set of circumstances. An additional thing to be concerned with in that case is the existing warranty (which isn't a test, but you have to know). John's response is more thorough than mine. I'm used to doing tear-offs because we already knew there was a problem. So everything came off...and we started over. A visual inspection of the deck was then possible. What sort of roofing material are you removing? Phil Kabza Senior Member Username: phil_kabza Post Number: 394 Registered: 12-2002 Posted on Monday, July 27, 2009 - 09:30 pm:    If it's a built up roof that you're considering rehabilitating using penetrants and resurfacing, look at ASTM D 2523 which will measure the remaining tensile strength of a cut out section of the roof. If the felts are broken down with age, they're not worth saving, even if they "look" intact. Many BURs can be restored and added to in lieu of tearoff if they weren't let go too far. But most are pretty wet by the time these questions get asked, and the wet stuff has to go. Wayne Yancey Senior Member Username: wayne_yancey Post Number: 239 Registered: 01-2008 Posted on Tuesday, July 28, 2009 - 12:09 pm:    Ralph, For a start, refer to the NRCA Manual, 5th edition, Volume 3, with 2006 updates. Volume 3 discusses reroofing or recover for low-slope and steep slope roofs. Wayne Nathan Woods, CCCA, LEED AP Senior Member Username: nwoods Post Number: 303 Registered: 08-2005 Posted on Friday, August 14, 2009 - 11:37 am:    Wayne, can you please contact me offline? The contact info I have for you is no longer current. please email me at "nwoods" at "mve-architects.com" Thanks!