Thu, 11 Jun 2026 19:21:33 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46237#Comment_46237 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46237#Comment_46237 Wed, 04 Feb 2009 21:03:20 +0000 GREGORIAN
I expect it would be a lot cheaper just to pour them in loose and we think it would prevent rats using the cavity because loose beads would block their runs. Are there any disadvantages, though (e.g. less effective as an insulator, may leak out of any holes, may settle, may not fill all crevices)? My builder was also called to repair a damp wall. When he opened the cavity, it was filled with rockwool but ants had carried soil up into the rockwool and built a nest that bridged the cavity so water passed across. He believes loose beads would also prevent that. Grateful, for any advice. Best regards, Ian]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46247#Comment_46247 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46247#Comment_46247 Wed, 04 Feb 2009 21:45:09 +0000 CWatters http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2806&page=1

PS: Keep polystyrene away from wiring as it can react with PVC in the cables insulation. It's one reason why the leads supplied with electrical appliances are normally in plastic bags.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46252#Comment_46252 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46252#Comment_46252 Wed, 04 Feb 2009 22:10:08 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46436#Comment_46436 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46436#Comment_46436 Thu, 05 Feb 2009 18:31:23 +0000 chuckey Frank]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46440#Comment_46440 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46440#Comment_46440 Thu, 05 Feb 2009 19:01:52 +0000 GREGORIAN https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46502#Comment_46502 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46502#Comment_46502 Thu, 05 Feb 2009 22:05:13 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46524#Comment_46524 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46524#Comment_46524 Thu, 05 Feb 2009 23:55:32 +0000 SimonH
Definetely don't do pour your own beads...

a) it won't have a 25 year CIGA guarantee (which can be a godsend if your walls were crap anyway!)
b) it will mean more labour for you
c) it will cost more than the discounted grant price - especially if you include your labour costs. You should be able to get them for less than £200 - the bigger the house the bigger the CO2 saving and hence CERT grant - so cost to the customer is usually constant.
d) You're not guaranteed to fill all the cavities yourself.

Go to this page http://www.bbacerts.co.uk/query3.html

And take a look at the drill patterns and on the left hand side click walls/cladding, then blown in cavity wall insulation. Click the swirly arrow to download the certificates.

e.g. to save you time these are the first 3 examples...

http://www.bbacerts.co.uk/certs/17/1720i2_web.pdf (page 7)
http://www.bbacerts.co.uk/certs/32/3228i3_web.pdf (page 7)
http://www.bbacerts.co.uk/certs/37/3706i2_web.pdf (page 7)

You'll notive the drill pattern always includes areas under the windows, and some extra at ground floor level, with a larger amount at the eaves to make sure it get topped up properly. If you drop them in at the top, you'll get holes under windows, under wall ties, and at the corners of the building

PS. I'm not a cavity salesman or installer - but did my reasearch when I wanted mine doing. I do know someone in the trade. She also told me her worst day - was when a potential customer said "what? £150!!?? - I could get a flight to Spain for that!" Doh!.

Simon]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46636#Comment_46636 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46636#Comment_46636 Fri, 06 Feb 2009 17:12:46 +0000 saxony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46648#Comment_46648 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46648#Comment_46648 Fri, 06 Feb 2009 18:39:13 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46654#Comment_46654 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46654#Comment_46654 Fri, 06 Feb 2009 20:17:57 +0000 saxony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46669#Comment_46669 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46669#Comment_46669 Fri, 06 Feb 2009 22:27:34 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46717#Comment_46717 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=46717#Comment_46717 Sat, 07 Feb 2009 19:36:58 +0000 chuckey Frank]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=47918#Comment_47918 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=47918#Comment_47918 Tue, 17 Feb 2009 17:22:24 +0000 silverback2 Two Questions :
1. How can I find out if there are other areas missing this foam board? (or whatever it is that they are supposed to have put into the cavity)
2. If there is piecemeal presence of this insulation, can I have wall insulation put in, and, if so, what's the best product for this situation? (rockwool, polystyrene beads, foam)?
Thanks]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=47927#Comment_47927 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=3496&Focus=47927#Comment_47927 Tue, 17 Feb 2009 18:47:41 +0000 tony