International Association of Certified Home Inspectors
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| Thermal Imaging, Infrared Cameras & Energy Audits Contains discussions about thermal imaging, infrared cameras, energy audits, and more. |
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#1
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How can I find out if a window has the corecct R-rating the manufacture is claiming? A client of mine feels his new windows are not doing the efficient job he is expecting them to do. He has installed commercial grade baked on primer aluminum double pain windows. I have not seen them or confirmed his complaint yet. But would like to be able to know if the R-value is correct on them. Thank people ahead of time for any remarks.
J.Szczesny 4 Seasons Home Inspections Washington State Inspector # 711 800 5th Ave #101-385 Seattle, Wa 98104 (206)391-0285 online @ www.4seasonsinspects.com email @ info@4seasonsinspects.com toll free cal @ 866-512-9972 "For the best protection, get the right inspection" |
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#2
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I don't think they rate windows in "R Value" anymore.
Is this really what you want to know? You can measure heat transfer and convert to an R-Value. What kind of temperature measurement equipment to you have accessible? The ratings they advertise is done in a lab so your readings will not match. Heat transfer through windows occurs through conduction, convection and radiation. R-Value will only address the conduction part. The clients problem may be because of the others as well. What is your plan? "Insanity: doing the same thing over and over again and expecting a different results." Albert Einstein Clarksville - Nashville Home Inspector Lic#40 http://www.midtninspections.com ITC Level III Thermographer Cert#1958 Building Science Thermographer Cert#33784 http://www.thermalimagingscan.com HVAC Certification EPA Cert#2046620 Link to my Website at: http://www.midtninspections.com/link-submission Last edited by dandersen; 5/3/09 at 3:16 PM.. |
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#3
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Why not advise him to call the manufacture of the windows for any questions about them?
“The things that will destroy America are peace at any price, prosperity at any cost, safety first instead of duty first, the love of soft living, and the get-rich-quick theory of life.” Theodore Roosevelt Joe Funderburk, CMI Alpha & Omega Home Inspections, LLC Inspecting Upstate SC & Charlotte Metro, NC NACHI ID: NACHI05120170 www.aohomeinspection.com |
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#4
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Aluminum frame windows are horribly inefficient regardles of whatever magical glass is installed. I did a home last weeks where the interior of the frames were 105 degrees with the morning sun on them. It was 80 degrees outside.
David Sorge (USN Retired) FL License HI142 Infrared Certified Thermographer Inspect-It 1st of Northeast Florida Serving Jacksonville and surrounding communities 904-484-4847 dsorge@inspectit1st.com http://www.dsorgeinspects.com http://www.linkedin.com/profile?view...US&trk=tab_pro We see RED...InfraRED When we see RED... You see $GREEN$ Ask us how? |
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#5
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#6
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Kewl tewl Brian...and only $799!
Excellence in Inspections Mike Boyett, TREC #7290 mikeb@capcityinspections.com Capital City Inspections Austin, Texas (512) 577-2579 Company blog is: www.capcityinspections.com/blog |
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#7
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#8
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InterNachi Awards Portal: http://co.nachi.org/inachiawards/ ____________________________________________ "An Education, not just an Inspection" Larry Kage, CMI Lake Ann (Traverse City), Michigan 49650 231 929 3525 Professional Inspector serving the Traverse City, Michigan area and beyond.
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#9
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Please Note:
dbelmont is a non-member guest and is in no way affiliated with InterNACHI or its members.
Try to educate your client to the fact that heating performance is a whole house as system question. Not just one minor detail of one specific part. I doubt strongly that the U-value of the windows is the real culprit in any case. Look to the whole system.
What R-value (U-value) was he told the windows were? The point about commercial windows doesn't impress me. In my experience they are designed for different requirements then residential windows. Often of higher concern is the maintenance needs which is why aluminum is a popular case material. Let us know how it comes ouit. With pics please. |
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#10
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I had a sunroom once with high end aluminum frame windows, they had thermal breaks designed into the frames where no metal to metal connection existed from outside to inside. Some kind of cool glass too with 21 coats of silver and titanium with argon gas.
B.A. King Home Inspections, LLC www.BAKingHomeInspections.com Serving Charlotte NC area and Rock Hill SC areas. CMI Certified Master Inspector and Independent 704 301-3207 "Discovery consists in seeing what everyone else has seen and thinking what no one else has thought." - Albert Szent-Gyvrgyi, Nobel Prize for Medicine 1937 |
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#11
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Geesh, LowE 1, 2 or 3... U Factors, Solar Heat Gain and more. Several factors are there when ordering a window (not to mention AHJ has minimum standards too). The windows likely had a rating for these on the glass when purchased and could be looked at.
Generally you get what you pay for.... cheap clear glass unit installed into even a nice window frame can make it a lil warm. |
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