Tue, 19 Dec 2023 05:11:26 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=203629#Comment_203629 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=203629#Comment_203629 Fri, 13 Jun 2014 17:02:54 +0100 Shevek
However I'm still quite worried about the fact that the existing rafters are untreated, so I was wondering about putting moisture monitors in the roof fabric.

Is this something any of you guys have done? Can you recommend a product?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=203637#Comment_203637 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=203637#Comment_203637 Fri, 13 Jun 2014 22:11:21 +0100 Shevek http://www.smtresearch.ca/products/moisture-detection-sensor-mds-wstereo-jack]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=203643#Comment_203643 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=203643#Comment_203643 Sat, 14 Jun 2014 07:56:54 +0100 SteamyTea I shall post some more about it on my Raspberry Pi thread when I get time.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204081#Comment_204081 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204081#Comment_204081 Sat, 21 Jun 2014 09:05:32 +0100 Shevek http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204083#Comment_204083 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204083#Comment_204083 Sat, 21 Jun 2014 09:14:05 +0100 SteamyTea https://learn.adafruit.com/dht-humidity-sensing-on-raspberry-pi-with-gdocs-logging/overview
I shall post more up on the RPi thread when I get time.
I quite fancy setting up some in a box to see how vapour permeable the box material is.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204086#Comment_204086 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204086#Comment_204086 Sat, 21 Jun 2014 09:48:24 +0100 Shevek http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204101#Comment_204101 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204101#Comment_204101 Sat, 21 Jun 2014 15:27:43 +0100 SteamyTea I use wireless as it is easy to set up and use (less wires about).
The bit bit of Python code I wrote logs the data to a text file that can be opened in a spreadsheet. Would not be too hard to write the script to set up an alarm (flashing LED) if you wanted it to.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204104#Comment_204104 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204104#Comment_204104 Sat, 21 Jun 2014 17:59:41 +0100 slidersx200
Is the concern that any vapour barrier to the warm side of the insulation may not be continuous as this is a retrofit scenario? Presumably you are fitting one, the external roofing membrane is the breathable layer you refer to and you are certain the spray insulation between is open cell so any potential risk of moisture from the inside finding a weak spot in the vapour barrier and not being able to get out should be minimal.

The main thing is to take your time with the vapour barrier and make every effort to get a continuous layer:-)]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204115#Comment_204115 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204115#Comment_204115 Sat, 21 Jun 2014 21:09:53 +0100 Shevek
The breather membrane is laid well, all joints taped (although I wasn't around for the entire installation) but I believe there could be a problem at the bottom batten, where, despite using (12 mm) counter battens, there is no gap under the last batten and saw dust + a bit of mortar may have fallen down behind the tiles and gathered at the bottom batten.

For a tiny expenditure we can be forewarned of any problems, lift the roof tiles and find the problem before the (untreated) rafters rot.

(VCL not installed yet)]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204120#Comment_204120 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204120#Comment_204120 Sat, 21 Jun 2014 22:33:18 +0100 argy http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204162#Comment_204162 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204162#Comment_204162 Sun, 22 Jun 2014 18:54:09 +0100 djh Posted By: ShevekWe're insulating our existing pitched roof with Icynene and we've added a breather membrane.

However I'm still quite worried about the fact that the existing rafters are untreated, so I was wondering about putting moisture monitors in the roof fabric.

Is this something any of you guys have done? Can you recommend a product?
I'm about to do it in my roof and walls, but my construction is a lot more weird than yours! I've bought a monitoring system from a chap in Canada who's done several straw bale systems before.

One gotcha for me is that you can't put sensors everywhere and since you're looking for unforseen problems, how do you decide where to put them?

The other problem I've got tonight is trying to remember where in the walls they should go. Top or bottom, inside or outside? I remember the risks in summer and winter are different and that the Americans and Japanese came to different conclusions about the risks, but I've forgotten where I stashed the information ]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204163#Comment_204163 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=204163#Comment_204163 Sun, 22 Jun 2014 18:57:03 +0100 djh Posted By: ShevekIs there anything like this available the in the UK?
http://www.smtresearch.ca/products/moisture-detection-sensor-mds-wstereo-jack
Dunno, but that system will only detect liquid water and then only in quantity. So it's only likley to detect rain leaks IMHO. The system I'm using has humidity sensors so I can hopefully see problems developing (or prove they are not).]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211305#Comment_211305 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211305#Comment_211305 Wed, 15 Oct 2014 15:39:46 +0100 Rick_M
ebay item no - 251678782452, 261478202160

you could leave them permanently embedded in one or two rafters (assuming the 200mm will reach through the insulation, I don't know your roof build up). Or have access points drilled that you could put the probe into, and reseal when done. Alternatively you could make a small section of your insulation removable so you could take a look easily and put it back after inspection?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211308#Comment_211308 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211308#Comment_211308 Wed, 15 Oct 2014 16:51:34 +0100 SteamyTea http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211322#Comment_211322 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211322#Comment_211322 Wed, 15 Oct 2014 19:59:07 +0100 Rick_M http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211323#Comment_211323 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211323#Comment_211323 Wed, 15 Oct 2014 20:13:50 +0100 ringi http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211327#Comment_211327 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211327#Comment_211327 Wed, 15 Oct 2014 22:11:48 +0100 SteamyTea No harm in trying though and they are half the price of my loggers (which I have 8 running at the moment so I can calibrate them, 5 DHT11s and 2 DHT22s).

My understanding of rotting is that it needs to be damp, little air movement and warm enough for the bacteria to grow.
Somewhere on here we looked into it, but don't ask me where now.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211338#Comment_211338 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12198&Focus=211338#Comment_211338 Thu, 16 Oct 2014 08:48:13 +0100 Timber
The tails can be nails driven into the wood and standard cable with a 3.5mm jack on the end. Obviously check the system is working before covering it all in. It should be possible to get it all set up for about £40 plus the cost of the moisture meter.

Alternatively you could hook the tails up to a something like a Raspberry Pi and get it to auto log etc, but a manual check every so often should alert you to issues very quickly.]]>