Talk:Building insulation

message: There needs to be a section on insulation (over insulation) and air quality in the home. The reduction of air quality in the home has been linked to over-insulation. This creates a low level of air exchange which allows contaminants to remain in higher concentrations in the air breathed by occupants. A good deal of research has been done on this subject by Environmental Specialists at Mass General and MIT.  —Preceding unsigned comment added by 24.147.110.167 (talk) 16:17, 30 August 2009 (UTC)
thread_title: Insulation and Air Quality

message: Lingering question:  If you install spray foam between rafters, and your attic is part of the conditioned space of your house (not kept cold in the winter), do you still need to leave an air baffle to allow air circulation against the underside of the sheathing?'--82.132.248.198 (talk) 18:34, 30 September 2010 (UTC)
replies: text: if the foam abuts the underside of the roof then heat will conduct freely between roof and the foam.  In summer that means the foam has to deal with the hot underside of the roof rather than just the emitted radiated heat.  In winter you have one less barrier (the air gap) to reduce conduction outward. 
Dymonite (talk) 12:59, 19 December 2007 (UTC)

text: Spray foam applied directly to the unventilated rafter bays is called a hot roof. I am not an expert on these roofs but I do know that on a hot roof the roofing material, frequently asphalt shingles, will get hotter than a warm roof (not ventilated) or cold roof (properly insulated and ventilated) which will shorten the life of the shingles. I think this is allowed by the building codes in the U.S. Jim Derby (talk) 03:47, 6 January 2014 (UTC)
thread_title: Lingering question

message: Mold is spelled M-O-L-D... there is no U as in M-O-U-L-D. If you need further assistance I can point you to a free online dictionary.
: Where it will state that "mold" is an Americanization of the British (and international English - everywhere except America) 'Mould'. Miscreant (talk) 08:46, 21 February 2009 (UTC)
thread_title: How to spell "mold"

message: "Insulation" covers a not just the 'thermal' but also 'fire' (flame), 'acoustic', 'impact' insulation , etc. that are not reflected on this page at all.
Even in the photo of the hallway, likely there is nothing but the pipework mouldings acting primarily  as _thermal_ insulation. 
Perhaps this topic should be just merged into 'thermal insulation', or called 'thermal building insulation'. Any thoughts? Miscreant (talk) 11:28, 14 December 2007 (UTC)
thread_title:  "Building insulation" is only Thermal insulation??? 

message: In the cold climate section I tagged the statement that windows are the largest source of heat loss as dubious.  I also removed the link to passivhaus, because, although it's relevant, it was misleading to have it linked as window heat loss.  Windows do usually have some of the largest heat loss per unit area, but since the area is small compared to the roof, it's not clear that the total loss dominates.  Certainly it does in some buildings, but the claim that it's typically the largest?  Needs a source.
I also removed the discussion of radiation from furniture and humans to the wall.  That's all true, but it's not relevant in planning insulation.  One can build walls with cellulose, foam, fiberglass, or air, irrespective of how the heat gets from the humans and furniture to the wall.  The emissivity of the wall and its effect on thermal comfort, but the discussion here didn't do that issue justice and would be more likely to add confusion than clarity.
Ccrrccrr (talk) 00:43, 22 December 2007 (UTC)
replies: text: Actually internal radiation losses are important in insulation.  Low-e windows have the ability to  reduce radiant heat transfer.  They work in a different way to double glazing which reduces conductive/convective transfer.  The combined effects are additive. Have you noticed that standing near a window can feel a lot colder on a winter's day.  A lot of this is related because you are not near any interior furnishings/walls to receive radiant heat - therefore net loss out the window from your body.  Conducted losses should not be that great due to  air being a poor conductor.  —Preceding unsigned comment added by Dymonite (talk • contribs) 06:09, 22 December 2007 (UTC)
thread_title:  Cold climate 

message: I goofed by adding deleted material back into planning, not realizing it had moved to "legislation".  But the legislation section didn't have anything of substance about legislation, and included discussion of the DOE zip code calculator, which isn't about legislation at all, and included a passive house link.  I added that all back into the planning section.  I tried to do it with acknowledgment of the stuff that is US focused, without eliminating useful information.  The mention of building codes isn't because the planning section is a good place to talk about building codes.  It's only mentioned as NOT being a good basis for planning.  
Ccrrccrr (talk) 02:12, 22 December 2007 (UTC)
thread_title:  planning vs. legislation 

message: The "Planning" section seems badly organised and undeveloped.  I don't see why the world has to be split into "US" and "International" - this seems unbalanced - especially since Wikipedia is an international site and there is only one country listed in "International".
I'd suggest removing "International" and moving Russia to the same level as the US.  I'd also like to suggest that more countries be added to this section.
--School of Stone (talk) 16:53, 12 November 2010 (UTC)
thread_title:  International planning 

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thread_title:  External links modified 

message: ... is to make cool videos -- paint + foam => cool stuff to watch. Maybe consider a section on unconventional uses of building insulation.--Tomwsulcer (talk) 00:35, 12 December 2016 (UTC)
thread_title:  Cool new use of expanding foam building insulation 

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thread_title:  External links modified 

message: I came to Wikipedia hoping to find a fairly formal definition of "R factor."  Specifically, I'd like to know whether it's defined in a way such that the number billed as "R factor" can be massaged into some dimensionally equivalent fraction of powers of SI units. I searched R factor *per se* on Wikipedia and learned that "[r]esistance transfer factor (shortened as R-factor or RTF) is an old name for a plasmid that codes for antibiotic resistance." The only disambiguation entry linked from there informs me that "R factor" is also part of the terminology of crystallography. Then I come to the present article and there are four instances of the word "factor," none of which reference R-factor.
Lori (talk) 15:09, 9 January 2019 (UTC)
thread_title:  R factor