The vapor barrier over the piping is to keep the insulation from getting under the pipes and insulating it from heat infiltration from the room below. The batts over tented spaces are used because it is easier to keep them in place at the desired thickness over the pipes, the most important place, than the blown stuff.
On Thu, Jun 4, 2015 at 11:40 AM, Charles Thurston <[email protected]> wrote: > Hello Jeff, > > Hard to do in an assisted living facility, Gotta have wet pipes to get the > water to the rooms. > > Thursday, June 4, 2015, 1:38:40 PM, you wrote: > > > Don't we know it. The details and longevity is critical. Best to > > avoid the areas subject to freezing. > > Jeff Feid > > > -----Original Message----- > > From: Sprinklerforum > > [mailto:[email protected]] On Behalf Of > Scott A Futrell > > Sent: Thursday, June 04, 2015 11:06 AM > > To: [email protected] > > Subject: RE: Insulation of pipe in attics > > > "Tenting" can be problematic regardless of where the vapor barrier is > located. > > > The tent must remain intact for the life of the structure and by > > intact I mean free from being disturbed by anyone in the space > > (electrical, cable, satellite, other) and if there are holes or gaps > > from the install, settling of the insulation, or someone in there, > > the cold air gets in. The cold also can be drawn in through holes > > or gaps by mechanical equipment creating a negative in the structure > > such as bathroom exhaust fans, kitchen exhaust fans, furnaces, > > fireplaces, and so on and a combination of those all operating at > > the same time makes the condition worse. > > > Be careful when you go this route. > > > Scott > > > > Office: (763) 425-1001 x 2 > > Cell: (612) 759-5556 > > > -----Original Message----- > > From: Sprinklerforum > > [mailto:[email protected]] On Behalf Of > Charles Thurston > > Sent: Thursday, June 04, 2015 10:54 AM > > To: John Denhardt > > Subject: Re: Insulation of pipe in attics > > > Hello John, > > > Thank You. Those are good, but they are blowing in the insulation > > in the rest of the ceiling so they do not show the plastic sheeting > under the batts of insulation. > > > Thursday, June 4, 2015, 11:22:51 AM, you wrote: > > >> Look at the NFPA Research Foundation report that covers insulation for > >> sprinkler piping. It has some very good details and pictures. > > >> John > > >> -----Original Message----- > >> From: Sprinklerforum > >> [mailto:[email protected]] On Behalf Of > >> Charles Thurston > >> Sent: Thursday, June 04, 2015 11:27 AM > >> To: [email protected] > >> Subject: Insulation of pipe in attics > > >> Hello Sprinklerforum, > > >> I have a project where they are using blown insulation in the attic. > >> Per the diagram I have seen many times I showed plastic sheeting > >> draped over the pipe and batt insulation on top of the plastic. The > >> insulation installers put the batt on the pipe and plastic over that. > >> Looking for the code section that describes it with the plastic under > >> the pipe. I looked at 13 which refers back to 13D that I do not have > >> here, Any help on the section with the diagram? > > > > > > -- > > Best regards, > > Charles mailto:[email protected] > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > -- > Best regards, > Charles mailto:[email protected] > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) A problem well stated is a problem half solved. -Charles F. Kettering, inventor and engineer (1876-1958) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
