Skylights and such are easy to keep leakproof, but you do have to check the plastic parts every once in a while. Years ago I installed one of those "sun-tunnel" type tubes for a small, windowless bath, and it worked great; however, about the time I replaced the roof, I discovered that the cover dome had cracks in it. Not just hazing, but cracks you could easily force a finger into! They had developed within the prior year, and when the rains began, they would have let the water in- not too much, but enough.
When replacing the dome, I found that it had been acrylic, but a polycarbonate version was available for "harsh climates". I ordered the latter, even though the helpfull "expert" said it was unnecessary. Yeah, right. -Dave ----- Original Message ----- From: "Scott McGrath" <scmcgr...@gmail.com> To: j...@quikus.com Cc: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Monday, November 26, 2012 10:52:26 AM Subject: Re: [time-nuts] GPS antenna in attic? They are no harder than a chimney to keep leakproof unless they are flush in which case everything said is true. You need structure and a leakproof membrane and proper flashing to redirect water Sent from my iPhone On Nov 26, 2012, at 10:38 AM, "J. Forster" <j...@quikus.com> wrote: > I considered that about 5 years ago when I reroofed. The roofing > contracctor told me that anything like a skylight is very, very hard to > make and keep leakproof. You really, really don't want a leaky roof. > > -John > > ================= > >> Or install a frosted dome type skylight as a radome lights the attic and >> allows for better reception >> >> Sent from my iPhone >> >> On Nov 25, 2012, at 10:15 PM, "J. Forster" <j...@quikus.com> wrote: >> >>> There are ways to do it w/o drilling holes. Most all houses have vent >>> stacks for the plumbing, typically 3 or 4 inch cast iron or thick >>> plastic. >>> >>> You can clamp a couple of feet of pipe onto one of those and run the >>> wire >>> to under an eve or through a gable end, adding a drip loop of course. >>> >>> But, if it were my house and I just wanted to discipline my local >>> standard, I'd try the attic first. Among other things, you can get to >>> the >>> antenna w/o climbing on the roof! >>> >>> New England is not sunny CA. >>> >>> -John >>> >>> ================ >>> >>> >>> >>>> On Sun, Nov 25, 2012 at 8:50 AM, Peter Gottlieb <n...@verizon.net> >>>> wrote: >>>> >>>>> I'm beginning to set up in my new house and planning where all my >>>>> various >>>>> antennas are going to go. Being a wood frame building, I was >>>>> wondering >>>>> if >>>>> it was sufficient to simply mount my Thunderbolt GPS antenna high in >>>>> the >>>>> attic. >>>> >>>> >>>> It will work but it will be far from optimal. All you need to do is >>>> get a >>>> big drill bit and drill through the roof and put up an iron galvanized >>>> pipe. Put a pipe flange on the end and bolt the GPS antenna to that. >>>> You >>>> will need some metal flashing and roofing tar and then you will have a >>>> first class setup. You run the coax down the pipe. The timing >>>> antennas >>>> are pointed on top so snow falls off >>>> >>>> Chris Albertson >>>> Redondo Beach, California >>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@febo.com >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>> >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.