Robert Jones Posted August 14, 2014 Report Share Posted August 14, 2014 Foil type material covering the under-floor area of a home built in 1949. Click to Enlarge 49.46 KB Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted August 14, 2014 Report Share Posted August 14, 2014 Radiant barrier. Quote Link to comment Share on other sites More sharing options...
Robert Jones Posted August 14, 2014 Author Report Share Posted August 14, 2014 Unusual to see in a crawl space. Mostly for attics right? Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted August 14, 2014 Report Share Posted August 14, 2014 No. Heat radiates in all directions. It is designed to reflect radiant heat back too its source. Quote Link to comment Share on other sites More sharing options...
Robert Jones Posted August 14, 2014 Author Report Share Posted August 14, 2014 Thanks Tom. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted August 14, 2014 Report Share Posted August 14, 2014 Foil type material covering the under-floor area of a home built in 1949. Click to Enlarge 49.46 KB I see it mostly in homes that had electric radiant ceiling heat. Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted August 14, 2014 Report Share Posted August 14, 2014 It's not common here, but I see it in crawls more than attics. I found one that was energized while crawling in mud with a sweat-soaked shirt. Quote Link to comment Share on other sites More sharing options...
Nolan Kienitz Posted August 14, 2014 Report Share Posted August 14, 2014 It's not common here, but I see it in crawls more than attics. I found one that was energized while crawling in mud with a sweat-soaked shirt. Seems I recall Marc L. posting a study concerning radiant barrier being a pretty good conductor of electricity. Not long after he posted that article I happened across an installation (radiant barrier in an attic) that could have been compromised electrically as well. Quote Link to comment Share on other sites More sharing options...
Marc Posted August 14, 2014 Report Share Posted August 14, 2014 Download Attachment: Reflective-Radiant-Barriers-As-ignition-source.pdf 838.41 KB Marc Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted August 14, 2014 Report Share Posted August 14, 2014 Yes they can become energized. So can foil house wrap, foil faced insulation, metal flues, aluminum clad windows, steel doors, and brass door knobs. In the early 90s I was working on a new subdivision when I encountered a house that was completely energized through those components. The blower switch on a fireplace insert contacted the chassis. A siding nail connected the aluminized house wrap to the flue pipe strapping. The fenestration was connected to the wrap via installation hardware. Quote Link to comment Share on other sites More sharing options...
Marc Posted August 14, 2014 Report Share Posted August 14, 2014 Yes they can become energized. So can foil house wrap, foil faced insulation, metal flues, aluminum clad windows, steel doors, and brass door knobs. In the early 90s I was working on a new subdivision when I encountered a house that was completely energized through those components. The blower switch on a fireplace insert contacted the chassis. A siding nail connected the aluminized house wrap to the flue pipe strapping. The fenestration was connected to the wrap via installation hardware. Becoming energized isn't the issue. It's conductive surfaces that cannot carry lightening currents without getting hot enough to ignite combustible material. Metallic flues, copper piping and such can, and do carry such currents and nothing happens because they can do it without harm. CSST and radiant plywood are in the same category. Make the conductive component thicker or don't allow them in houses. Every climate has lightening. Marc Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted August 14, 2014 Report Share Posted August 14, 2014 Fire is a high probability outcome from a lightening strike regardless of the components. If that outcome is the basis of your concern you should be pushing for codifying lightening suppression. Removing all conductive components and living in sod huts still presents the possibility of fire resulting from lightening strikes. Personally, I think the odds of a lightening strike are similar to the odds of one stray wire and one errant nail conspiring to place 120 volts across a doorknob. Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted August 14, 2014 Report Share Posted August 14, 2014 Lightening - the process of making something lighter in weight, color, brightness or mood. Lightning - the flashy stuff in the sky followed by loud booms. It could also be greased in the '50s and '60s. Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted August 14, 2014 Report Share Posted August 14, 2014 Homophobia - the fear of using the wrong homonym. There's no reason to be scared. Some helpful chap will come along and correct you. Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted August 14, 2014 Report Share Posted August 14, 2014 Homophobia - the fear of using the wrong homonym. I guess that would be funny if lightening and lightning were homonyms. Quote Link to comment Share on other sites More sharing options...
Chad Fabry Posted August 14, 2014 Report Share Posted August 14, 2014 Homophobia - the fear of using the wrong homonym. I guess that would be funny if lightening and lightning were homonyms. I think they pass for homophones so the word play is still funny. Quote Link to comment Share on other sites More sharing options...
Les Posted August 14, 2014 Report Share Posted August 14, 2014 Homophobia - the fear of using the wrong homonym. I guess that would be funny if lightening and lightning were homonyms. I think they pass for homophones so the word play is still funny. me two, tu, to, too, tou, tue, Quote Link to comment Share on other sites More sharing options...
Nolan Kienitz Posted August 14, 2014 Report Share Posted August 14, 2014 OK ... y'all prompted me a bit of a diversion (as I'm wont to do ... ) [^] Click to Enlarge 18.87 KB Mayfield, OK is the rig's location ... FYI Quote Link to comment Share on other sites More sharing options...
kurt Posted August 14, 2014 Report Share Posted August 14, 2014 Homophobia - the fear of using the wrong homonym. There's no reason to be scared. Some helpful chap will come along and correct you. That's funny, regardless. Quote Link to comment Share on other sites More sharing options...
Chad Fabry Posted August 15, 2014 Report Share Posted August 15, 2014 OK ... y'all prompted me a bit of a diversion (as I'm want to do ... ) [^] Click to Enlarge 18.87 KB Mayfield, OK is the rig's location ... FYI Ha!, I get it! Quote Link to comment Share on other sites More sharing options...
kurt Posted August 15, 2014 Report Share Posted August 15, 2014 I want, as is my wont. Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted August 15, 2014 Report Share Posted August 15, 2014 I wondered when the spelling monitor would catch this one. Lightening - the process of making something lighter in weight, color, brightness or mood. Lightning - the flashy stuff in the sky followed by loud booms. It could also be greased in the '50s and '60s. Now here is one from a state where education has been getting the small change lately. Click to Enlarge 11.31 KB Quote Link to comment Share on other sites More sharing options...
Rob Amaral Posted August 16, 2014 Report Share Posted August 16, 2014 No wonder I see so many spelling errors on CNN.. Quote Link to comment Share on other sites More sharing options...
rjbrown2 Posted August 16, 2014 Report Share Posted August 16, 2014 Spelling in a non-phonetic, poly sourced language like American English is not correlated with the intelligence of the writer. There are some fanciful quotes variously attributed to Jefferson, Mark Twain, et al about the narrowness of people who can only think of one way to spell a word. I liken spelling to good table manners, like not belching loudly after the meal, or wiping your mouth on your sleeve... Quote Link to comment Share on other sites More sharing options...
Trent Tarter Posted August 17, 2014 Report Share Posted August 17, 2014 I see this quite often in crawlspaces in 50's built homes. I call it "old reflective foil' or "foil radiant barrier". Quote Link to comment Share on other sites More sharing options...
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