Tue, 19 Dec 2023 05:31:35 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=208968#Comment_208968 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=208968#Comment_208968 Thu, 11 Sep 2014 18:10:21 +0100 Chris P Bacon
Any idea at what level of airtightness it ceases to be a heat loss issue and turns into a comfort issue?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=208969#Comment_208969 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=208969#Comment_208969 Thu, 11 Sep 2014 18:23:49 +0100 tony http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=208972#Comment_208972 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=208972#Comment_208972 Thu, 11 Sep 2014 20:59:43 +0100 PeterStarck
http://www.aecb.net/forum/index.php/topic,3928.0.html]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209054#Comment_209054 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209054#Comment_209054 Sat, 13 Sep 2014 10:59:04 +0100 Greenfish Posted By: djhSadly perhaps, the reason quoted for such a tight airtightness level in PH isn't to do with the energy or cash saved directly. The point as I understand it is to avoid drafts and to maintain internal surface temperature everywhere. That in turn allows you to reduce the internal air temperature by a degree or two whilst maintaining the same level of comfort, and that is what saves the energy and cash.

Have already noticed this effect. New build at 17C with the plaster still damp, felt more comfortable and warm than our old leaky house heated to 20C. Was flitting between them and old house just felt so chilly despite having heating going especially on windy days. Looking forward to living in new build this winter.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209077#Comment_209077 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209077#Comment_209077 Sat, 13 Sep 2014 16:57:42 +0100 djh Posted By: GreenfishNew build at 17C with the plaster still damp
Our new build is currently at 18.2°C and 101% humidity according to my cheap Chinese meter

Well, actually it's now at 100% humidity since I put a fan in there to stir the air around.

edit: I should say that we've just applied some internal plaster, I suppose. Doh.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209078#Comment_209078 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209078#Comment_209078 Sat, 13 Sep 2014 17:08:17 +0100 Greenfish
djh - 100% humidity, open a window maybe?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209079#Comment_209079 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209079#Comment_209079 Sat, 13 Sep 2014 17:20:47 +0100 Ed Davies http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209096#Comment_209096 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209096#Comment_209096 Sat, 13 Sep 2014 23:29:43 +0100 djh Posted By: Greenfishdjh - 100% humidity, open a window maybe?
Windows are sealed (a) for the duration to keep plaster particles and other dust out of the seals and mechanisms and (b) at the moment because the protective film stops them opening in any case.

I'll see what happens over the next day or so and maybe use some forced ventilation to get it down. One of the wall terminals that will connect to the MVHR is open and so is the front door so I can probably jury rig a fan.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209276#Comment_209276 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209276#Comment_209276 Thu, 18 Sep 2014 20:56:54 +0100 borpin http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209277#Comment_209277 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209277#Comment_209277 Thu, 18 Sep 2014 21:21:59 +0100 tony http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209291#Comment_209291 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209291#Comment_209291 Fri, 19 Sep 2014 12:02:36 +0100 Greenfish http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209309#Comment_209309 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209309#Comment_209309 Fri, 19 Sep 2014 18:03:39 +0100 djh
We have cracked open one window to get a bit more air circulation; hopefully with the plasterer offsite at the moment we won't see too much dust. I've also got a couple of fans and a low-powered heater in there. The lime plaster does seem to be getting slowly stiffer.

We haven't fitted any of the door hardware yet so it can't rust (well at least not from the plaster curing!) and tradesmen or visitors can't open windows! MVHR is indeed a good idea in all airtight buildings, but it's an extremely bad idea to use it in an unfinished building because of dust etc, especially one that isn't even at first fix stage so has no proper power or drainage.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209315#Comment_209315 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209315#Comment_209315 Fri, 19 Sep 2014 19:32:53 +0100 tony http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209339#Comment_209339 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209339#Comment_209339 Sat, 20 Sep 2014 08:46:32 +0100 Greenfish http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209361#Comment_209361 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209361#Comment_209361 Sat, 20 Sep 2014 21:49:54 +0100 djh Posted By: GreenfishOh yes had mould too. The MDF window ledges were like a magnet for it, bad choice in a wet finish build or should not have plastered them into the reveal in the traditional way.
Thanks for that tip. I'll keep an eye on them.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209404#Comment_209404 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=209404#Comment_209404 Sun, 21 Sep 2014 22:14:26 +0100 djh ]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263311#Comment_263311 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263311#Comment_263311 Thu, 23 Nov 2017 10:57:32 +0000 andysadler
https://www.sadlerenergy.co.uk/services/air-tightness-testing]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263312#Comment_263312 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263312#Comment_263312 Thu, 23 Nov 2017 11:56:15 +0000 jfb http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263315#Comment_263315 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263315#Comment_263315 Thu, 23 Nov 2017 14:46:24 +0000 Victorianeco
I was thinking a car fan in a piece of ply and take out a window pane...

Run at full speed and chase round with a vape pen as mentioned. Sound okay?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263319#Comment_263319 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263319#Comment_263319 Thu, 23 Nov 2017 16:20:09 +0000 djh Posted By: VictorianecoCan anyone recommend a basic DIY setup for finding leaks rather than calculating a number?

I was thinking a car fan in a piece of ply and take out a window pane...

Run at full speed and chase round with a vape pen as mentioned. Sound okay?
Yes, that will work, as long as you're airtight enough that the fan can blow enough air through the cracks you're looking to find. You may find you don't need to take out a window pane but just open a window and tape the ply in place.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263321#Comment_263321 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263321#Comment_263321 Thu, 23 Nov 2017 17:03:07 +0000 snyggapa
Walk around the usual suspect places and stuck your hand near it, you can feel the air moving in through the cracks

I guess a smoke pencil will also have the same effect]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263323#Comment_263323 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263323#Comment_263323 Thu, 23 Nov 2017 17:37:18 +0000 DarylP ]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263368#Comment_263368 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263368#Comment_263368 Sun, 26 Nov 2017 09:34:10 +0000 neilu Try to position your fan in a central room or hallway and close all the internal doors. Then when the fan is running just open the door to the particular room you are looking for leaks in. That will concentrate the air flow to that particular room.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263407#Comment_263407 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12521&Focus=263407#Comment_263407 Mon, 27 Nov 2017 08:45:42 +0000 Greenfish
My few leaks were all related to external doors. All but one I have adjusted and no longer leak, the last still has issues when 60mph wind is directly at it and is really fiddly to adjust (I have to remove it from the hinges to do some of it). But I will crack it in the end!

I now think there are good arguments for outward opening windows and doors on exposed sites, I wish someone had suggested it. OK, front door it would be silly to hit vistors in the face with the door, but backdoors and French doors etc. the inward opening ones have been far less of a propbelm than the outward ones.]]>