Sun, 26 May 2013 04:46:03 +0100 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95857#Comment_95857 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95857#Comment_95857 Sat, 04 Dec 2010 17:53:01 +0000 jazgill
I'm planning an energy efficient, airtight home using SIPs along with MVHR, triple glazed windows etc.
I'm worried about overheating issues arising in the summer months. Please can someone advise of the best methods to minimize this issue.
Any replies much appreciated.
regards
Jaz]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95859#Comment_95859 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95859#Comment_95859 Sat, 04 Dec 2010 17:57:15 +0000 Nick Parsons http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95860#Comment_95860 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95860#Comment_95860 Sat, 04 Dec 2010 18:03:19 +0000 owlman http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95863#Comment_95863 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95863#Comment_95863 Sat, 04 Dec 2010 18:14:26 +0000 NiallMac http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95867#Comment_95867 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95867#Comment_95867 Sat, 04 Dec 2010 20:53:49 +0000 Timber
Some form of feature (louvres, planting, whatever) will help a lot with reducing solar gain in summer.

If it were me, I would design in passive solar for winter and the shoulder months, with a nice overhang or feature to prevent solar gain in summer. A dense concrete block internal spine wall that catches winter sun would also help to maximise winter absorbtion, and provide some control of internal temps in the summer.

Having said that, there are many many people across the world who live in timber frame houses (similar in terms of thermal mass) who make it work. The rest of the world can't be wrong...... can they?

Also, as an addition to the comment above about opening a window, think about through ventillation of windows, i.e. make sure that you can throw a few windows open on oposite sides of the house to get some decent cross ventillation in summer.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95884#Comment_95884 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95884#Comment_95884 Sun, 05 Dec 2010 09:02:04 +0000 SteamyTea http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95886#Comment_95886 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=95886#Comment_95886 Sun, 05 Dec 2010 09:26:35 +0000 tony
you ca use night time cooling or sort the MHRV with a summer bypass

physical shading is the best answer

Some lightweight houses in more northerly locations than the UK regularly overheat in winter too]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96060#Comment_96060 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96060#Comment_96060 Tue, 07 Dec 2010 19:55:40 +0000 Timber http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96062#Comment_96062 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96062#Comment_96062 Tue, 07 Dec 2010 20:01:14 +0000 Timber
During the winter the cavity would be blocked off with insulated closers and solar gain absorbed into the wall (perhaps allowing internal air into the void to promote convection on warm air). In the summer the bottom and top of the wall could be opened up to external air to promote night time cooling of the spine wall?!

I think it would work, but be very dependant on actually controling the air movement within the wall cavity!

Timber]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96071#Comment_96071 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96071#Comment_96071 Tue, 07 Dec 2010 21:37:44 +0000 Viking House http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96073#Comment_96073 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96073#Comment_96073 Tue, 07 Dec 2010 22:02:07 +0000 rhamdu Posted By: Timberbuild a twin leaf dense concrete wall and introduce deliberate and controlled air movement into the wall.


Something similar is already being done - unintentionally
http://www.dailymail.co.uk/property/article-1336116/The-new-homes-fail-energy-tests.html?ito=feeds-newsxml

(Thanks to @sebvandort of http://www.dailygreennews.co.uk/ for tweeting this, and @GeoffWilkinson for retweeting)]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96077#Comment_96077 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96077#Comment_96077 Tue, 07 Dec 2010 22:33:51 +0000 seascape http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96104#Comment_96104 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96104#Comment_96104 Wed, 08 Dec 2010 12:26:24 +0000 marktime
]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96106#Comment_96106 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96106#Comment_96106 Wed, 08 Dec 2010 12:38:18 +0000 SteamyTea
http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=5643&page=3#Item_8]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96130#Comment_96130 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96130#Comment_96130 Wed, 08 Dec 2010 16:16:30 +0000 Timber
I am with you on that one and a simple spine wall is, well, simple.

But you know people and the need to over-complicate things!! Plus I think it is an interesting idea in turning a passive process into a more actively controlled process.

Timber]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96148#Comment_96148 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96148#Comment_96148 Wed, 08 Dec 2010 20:02:46 +0000 DarylP
Use lots of thermal mass (ie dense materials inside the insulated enevelope)
Shading the south-facing windows (brise soleil)
Cross ventilation (windows open on postive and negative pressure side of house)

Cheers ... :-)]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96165#Comment_96165 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96165#Comment_96165 Thu, 09 Dec 2010 06:58:44 +0000 marktime
Am I re-inventing the wheel?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96167#Comment_96167 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96167#Comment_96167 Thu, 09 Dec 2010 07:26:54 +0000 SteamyTea Posted By: marktimeAm I re-inventing the wheel?

Yes.

But each house is different and can only be modelled to within a couple of degrees either side of the optimum. I have a low mass, timber framed house and have managed to make it reasonably stable (degree either side of 21C) except in the kitchen which is small and has the most window area and the door that is used the most.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96171#Comment_96171 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96171#Comment_96171 Thu, 09 Dec 2010 08:04:41 +0000 marktime http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96173#Comment_96173 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96173#Comment_96173 Thu, 09 Dec 2010 08:10:13 +0000 SteamyTea http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96188#Comment_96188 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96188#Comment_96188 Thu, 09 Dec 2010 10:07:14 +0000 marktime

(Or this new-fangled AutoCad. )]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96189#Comment_96189 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96189#Comment_96189 Thu, 09 Dec 2010 10:08:49 +0000 dickster http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96466#Comment_96466 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96466#Comment_96466 Sun, 12 Dec 2010 21:19:18 +0000 GreenPaddy
taking on board the shading ideas above, pehaps you could design in some strcutural supports in the zones above the window openings, so that shading (brise soleil) could be applid later, once you have lived in the house, and experienced a summer. SIP's (as I understand them) won't have great "pullout" resistance unless additional structure is design-in.

Since the shading detailing, does not always look that great on a dometic property (can look great on large office blocks etc), it could be a detatchable system, for example on the ground floor only if that was where most of the glazing were installed? What about a balcony (2 small balconies) over the glazed openings? I've just done that for my own "passive-style" house.

GreenPaddy.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96613#Comment_96613 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6633&Focus=96613#Comment_96613 Tue, 14 Dec 2010 13:10:30 +0000 adwindrum