Tue, 09 Jun 2026 04:35:11 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49012#Comment_49012 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49012#Comment_49012 Thu, 26 Feb 2009 13:55:38 +0000 DAI_EVANS
I'm trying to find some information out on the thermal properties and how good an insulator bubble wrap is.....I'm designing a transparent construction acedemy for a uni project and looking at using recycled bubble wrap (as long as someone hasn't killed it for stress relief first!) as an infil for transparent corrogated sheet cladding panels.

Can anyone help?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49042#Comment_49042 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49042#Comment_49042 Thu, 26 Feb 2009 17:42:28 +0000 biffvernon ]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49043#Comment_49043 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49043#Comment_49043 Thu, 26 Feb 2009 17:42:38 +0000 James Norton
(Note: is it UV stable....? if not stressed occupiers will not be the only durability risk)

J]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49048#Comment_49048 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49048#Comment_49048 Thu, 26 Feb 2009 17:49:26 +0000 DAI_EVANS
As for being UV stable I've got no idea James, hopefully by the time the lecturers find out it isn't I'll be sunning it up somewhere tropical......like pembrokeshire! lol!

It should be very good especially if you folded it into multiple layers, trapping air between the layers and not just in the bubbles, the weakness is the areas around the bubbles. I've just got to come up with something innovative for an external fabric, for some reason bubblewrap just 'popped' in my head!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49056#Comment_49056 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49056#Comment_49056 Thu, 26 Feb 2009 18:32:38 +0000 Nick Parsons https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49061#Comment_49061 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49061#Comment_49061 Thu, 26 Feb 2009 19:00:41 +0000 CWatters
http://listserv.repp.org/pipermail/greenbuilding_listserv.repp.org/2007-October/004684.html

Shawna Henderson shawna at abridesign.com
Tue Oct 30 13:48:49 EDT 2007

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Ahhhh, does the bubble-wrap never go away? Here's the word on this product directly from Natural Resources Canada, supported by other North American agencies. Please note the R-values and the specific
installation/placement of the material, and see note #1 for the biggest challenge to the claims of the manufacturers: extrapolating from existing standards for materials with different capacities etc.
does not a qualified test make.


As a result of countless inquiries from the general public, building contractors and building professionals concerning claims made by manufacturers of foil-faced bubble insulation (FFBI) products, Natural Resources Canada (NRCan) has prepared the following information dealing with the effective thermal resistance (RSI/R
value) of FFBI and other non-bubble structure types of products for the purpose of modeling under its energy efficiency housing initiatives.

Canada Mortgage and Housing (CMHC), the National Research Center (NRC) and other various agencies across North America have performed studies on reflective films, such as foil-faced or foil embedded bubble insulation, and caution potential buyers about exaggerated claims and limitations of these products.

Currently, despite advertisements and comments made by manufacturers and salespeople in the Canadian marketplace, and unless otherwise proven by a respected third-party testing agency against a recognized
standard for the testing of such reflective materials, NRCan recommends the following effective thermal resistance maximum values for FFBI products when modeling them with HOT2000â„¢ software.

RSI 0.26 (R 1.5) where the bubble layer is between two layers of foil without air spaces in front of the foil.

RSI 0.53 (R 3) where the bubble layer is between two layers of foil with only one air space in front of the interior facing foil.

RSI 0.62 (R 3.5) where the bubble layer is between two layers of foil with air spaces in front of the foils.

RSI 0.62 (R 3.5) where the foil layer is between two clear layers of bubbles acting as air spaces

Refer to #5 below for information on the thermal resistance of other foil-faced products that do not incorporate an air bubble structure.

Issues Concerning FFBI Products:

1. There is no specific ASTM standard (American Society for Testing and Materials) applicable to FFBI products by which to rely upon. Manufacturers refer to various standards and extrapolate portions of various tests to indicate how the product will perform overall in the house. Therefore, it is currently extremely difficult to obtain proven, unbiased, third-party technical data on FFBI products.

2. The United State's Federal Trade Commission (FTC) has explicitly stated that manufacturers in the U.S.A. must label their product with its basic R-value for the materials involved. This is the same method that NRCan uses for its rating of up to RSI 0.26 (R 1.5), where there is no air space. If the foil product is installed
with an adjacent air space or other system, such as a layer of clear bubbles, then the FTC states that a "system R value" can be labeled to include the benefits of the material’s reflective qualities together with its basic R value. In Canada, no such information has yet been found on Canadian labeled products. It is important to note that in order to benefit from the system R values, the air space must be present and reflective coatings must be clean. Even the clear plastic bubbles can reduce reflectivity and overall performance. For
a report on a system R value by the Canadian Construction Materials Centre (CCMC), visit

http://irc.nrc-cnrc.gc.ca/pubs/ci/v4no2/v4no2_7_e.html.

It should be noted that due to the very complex nature of evaluating FFBI insulating products and their reflective/insulating properties, they are best evaluated as part of an assembly (e.g., wall, floor, slab
and ceiling). Unfortunately, very little third party assembly testing has been undertaken to date.

3. The majority of heat loss in the average Canadian home is from conductive heat loss and air leakage (not including windows). However, for houses with in-floor hydronic or electrical radiant heating, no substantial figures for radiant heat loss versus conductive heat loss are readily available (especially from basement
floors). Nonetheless, leading manufacturers and researchers of in-floor hydronic heating systems do NOT recommend anything but foam based sub-slab insulation. You will not find reflective type sub-
slab bubble insulation products or foil faced foam products in their manuals at this time. This includes bubble insulation where the reflective foil is between two clear layers of bubbles. An interesting report by CMHC on the Comparison of Under-Floor Insulation Systems can be found at: http://www.cmhc.ca/od/?pid=63728. The bubble insulation foil used in this report is the type where the reflective foil is between two clear layers of bubbles.

4. According to the Reflective Insulation Manufacturers Association (RIMA), "Reflective vapour/air barrier products and reflective sheathing can, if properly installed, provide additional thermal resistance to wall and ceiling assemblies. To do so the surfaces must be faced with intervening airspaces and the surface
characteristics of the reflective material must remain unchanged. The NRC has indicated that the thermal resistance of a 20-mm airspace with two reflective surfaces would be RSI 0.61 (R 3.46) for wall
applications. However, the absence of an airspace on either side of the insulation prevents any additional reflective thermal resistance. In such applications these products are expected to provide a maximum of RSI 0.26 (R 1.5), assuming the bubbles remain intact and unperforated."

5. If modeling a reflective foil film with or without a laminated layer of foam or fibre-based insulation board and there is a dead air space of 12 - 22 mm (½ inch to 1 inch), NRCan will accept an RSI value of 0.26 (R 1.5) for the foil and dead air space. If a layer of insulation is laminated to the foil with its adjacent air
space, then also add the insulation's RSI/R value. For the RSI/R value of the laminated insulation itself, use the values in Appendix 1 of the Energy Advisor Workshop Manual or other reliable sourced value). As noted, if there is no air space, then just calculate the value of the insulation (single-layer foil membranes without an
airspace have an RSI/R value of 0). If there is the possibility of air movement within the air space, the air currents (mass flow or convective air current) may negate the value of the reflective foil.

NRCan does not discredit other valuable characteristics of foil-faced bubble insulation, such as its flexibility, its air/vapour barrier characteristics or its use to reflect solar radiation in cooling climates. The intent of this paper is only to provide information on the effective insulation value accepted by NRCan for this type of
product, for the purpose of modeling houses under its energy efficiency housing initiatives.


Shawna Henderson
principal
Abri Sustainable Design & Consulting
Nova Scotia, Canada
www.abridesign.com]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49123#Comment_49123 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49123#Comment_49123 Fri, 27 Feb 2009 11:20:19 +0000 DAI_EVANS Don't know how the tensile fabric curtain doors are going to go down though! ]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49485#Comment_49485 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49485#Comment_49485 Mon, 02 Mar 2009 21:05:08 +0000 treewright https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49519#Comment_49519 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49519#Comment_49519 Tue, 03 Mar 2009 09:09:51 +0000 richy
Anyone want some? I'll swop it for something intersting!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49555#Comment_49555 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49555#Comment_49555 Tue, 03 Mar 2009 13:03:29 +0000 djh https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49745#Comment_49745 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=49745#Comment_49745 Wed, 04 Mar 2009 23:02:42 +0000 dave45 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=50094#Comment_50094 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=50094#Comment_50094 Tue, 10 Mar 2009 12:53:44 +0000 DAI_EVANS https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=52980#Comment_52980 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=52980#Comment_52980 Wed, 29 Apr 2009 17:38:06 +0100 DAI_EVANS
Can anyone suggest (or solve) how to combat condensation in my cladding panel? the panel comprises

Polycarbonate sheet (twin leaf, similar to double glazed panel)
Bubblewrap insulation
Polycarbonate sheet (as above)
All fixed to a timber frame

Sizes are flexible at the moment...

Any help greatly appreciated.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=52983#Comment_52983 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3653&Focus=52983#Comment_52983 Wed, 29 Apr 2009 18:17:58 +0100 DAI_EVANS