Green Building Forum - external wall insulation - energy savings Fri, 07 Aug 2026 19:30:20 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157259#Comment_157259 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157259#Comment_157259 Mon, 24 Sep 2012 17:41:43 +0100 ps_mrwonderful external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157260#Comment_157260 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157260#Comment_157260 Mon, 24 Sep 2012 17:47:44 +0100 Mike George
It has to be the closest scenario to either steady state [basic u-value] calculation or dynamic simulation. I've done both and the predicted sayings are huge. No reason to doubt they would be otherwise provided installation is in accordance with best practice.]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157262#Comment_157262 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157262#Comment_157262 Mon, 24 Sep 2012 17:56:36 +0100 jamesingram How about looking at retro fit cavity wall fill and see whats out there for this regarding post install monitoring.
EWI should be at least similar and hopefully better.
Certainly Passivhaus using EWI in germany etc. have lived in for over 10 years and are functioning]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157277#Comment_157277 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157277#Comment_157277 Mon, 24 Sep 2012 21:24:17 +0100 ikimiki
Is there anyone out there planning to install EWI next summer? Let's gather a list!]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157280#Comment_157280 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157280#Comment_157280 Mon, 24 Sep 2012 21:45:30 +0100 Mike George external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157284#Comment_157284 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157284#Comment_157284 Mon, 24 Sep 2012 22:03:39 +0100 fostertom external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157285#Comment_157285 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157285#Comment_157285 Mon, 24 Sep 2012 22:09:39 +0100 mattwprice external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157302#Comment_157302 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157302#Comment_157302 Tue, 25 Sep 2012 00:21:57 +0100 ikimiki
We (on the project team) are Lancashire-based; but travelling isn't a problem.

It seems we are all planning well ahead. :-)]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157307#Comment_157307 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157307#Comment_157307 Tue, 25 Sep 2012 04:58:56 +0100 nikhoward Posted By: ikimikiI am part of a university-based research project under which we would very much like to explore undertaking just this sort of before-after monitoring.

Is there anyone out there planning to install EWI next summer? Let's gather a list!

yes]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157308#Comment_157308 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157308#Comment_157308 Tue, 25 Sep 2012 04:59:55 +0100 nikhoward Posted By: nikhoward
Posted By: ikimikiI am part of a university-based research project under which we would very much like to explore undertaking just this sort of before-after monitoring.

Is there anyone out there planning to install EWI next summer? Let's gather a list!


yes

and cornwall]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157332#Comment_157332 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157332#Comment_157332 Tue, 25 Sep 2012 08:56:27 +0100 seascape external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157338#Comment_157338 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157338#Comment_157338 Tue, 25 Sep 2012 09:41:49 +0100 SteamyTea I am about to embark on a 3 year study of energy use (all going well) and I have found it very difficult to convince people that they need to know where they are before they do any improvements. What is the saying, 'marry in haste, repent at leisure'.
Over the last few years I have kept all my bills, though only this year have I kept weekly readings (I have logged data for the last couple of years though, just need sorting out), I know when I did improvement and what they are.
Now the caveat, human behaviour makes the biggest difference, it can account for up to 40% difference in energy use, but even if it is 20%, that variation will swamp most improvements made. This leads to a statistical nightmare (an area I work in), this is why I do little experiments to establish whether what I think is happening actually does. Though these are limited in scope, have scalability problems and the logging equipment is not of the greatest precision and accuracy, it does show what is happening and one can quickly determine (within a month usually) if something is a success (does what I thought) or a failure (does something else or nothing).
What I would say, for those that are seriously considering this as an area to study is to get some cheap temp loggers and a cheap 3 channel energy meter and start keeping records. Weather data is easy to get hold of generally, so compensating for that is easy enough. What would be really good is to embed some sensors in a wall (tempted to do this soon, only involves a bit of drilling and sealant), then monitor with different levels of EWI fitted over the area. Cheap and pretty definitive if done right, could easily be done over the nest 6 to 7 months and may well give us all a better idea.
Anyone up for that?]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157343#Comment_157343 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157343#Comment_157343 Tue, 25 Sep 2012 10:24:06 +0100 an02ew Posted By: fostertomMe too! West country, me.

Spoken like a true wurzle]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157345#Comment_157345 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157345#Comment_157345 Tue, 25 Sep 2012 10:27:21 +0100 SteamyTea external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157349#Comment_157349 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157349#Comment_157349 Tue, 25 Sep 2012 10:45:11 +0100 fostertom external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157363#Comment_157363 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157363#Comment_157363 Tue, 25 Sep 2012 11:44:54 +0100 ikimiki for room, wall and window temps, combined with matching radiator temp readings.

Aim: as close to 'fully sensored' as one can economically achieve.

This way one is looking at the performance of the building conditional on behaviour (how much heat one is pumping into each room).

The 'neat' thing about the above-mentioned system is that one can even log the movement of shutters, doors, and more.]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157369#Comment_157369 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157369#Comment_157369 Tue, 25 Sep 2012 12:19:45 +0100 SteamyTea Could easily see it cost £2-300 a house.
Have you decided exactly what you want to measure and why?]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157410#Comment_157410 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157410#Comment_157410 Tue, 25 Sep 2012 17:04:21 +0100 ikimiki
The objective of this strand of work would be to plug the above-identified paucity of longitudinal combined temperature and energy-behaviour mapping, spanning the winter before EWI and the winter after EWI.]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157434#Comment_157434 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157434#Comment_157434 Tue, 25 Sep 2012 20:21:01 +0100 chippyclaus Before the retrofit we used 13645KWh of Gas per year, the following year with most retrofit measures, ie triple glazing, airtight membranes, MVHR, solar thermal in place we used 7736KWh and last year with 100mm EWI (phenolic) in place we got to 5640KWH.
I hope this gives an indication of changes of fuel use.
By the way we have dealt with all segments of our 1950's bungalow apart from the solid floors.]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157439#Comment_157439 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157439#Comment_157439 Tue, 25 Sep 2012 20:32:33 +0100 jamesingram http://retrofitforthefuture.org/
is your's chippy , i know it's someone who posts here.
http://retrofitforthefuture.org/viewproject.php?id=270#graphs]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157454#Comment_157454 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157454#Comment_157454 Tue, 25 Sep 2012 22:00:21 +0100 SteamyTea Have you seen this thread:
http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=8160&page=1

I think there is another one with a circuit diagram and code on it.]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157506#Comment_157506 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157506#Comment_157506 Wed, 26 Sep 2012 11:36:06 +0100 ikimiki
Yes, I came across that thread. It's a nice implementation.

But for instrumenting up one or more houses, I gravitate toward the http://wirelesstags.myshopify.com/ type of system because of (i) no wires means easy, constraint-free sensoring, (ii) ease of scalability, with up to 255 sensors on a single wireless tag manager, (iii) continual, automatic upload 'to the cloud' is possible, without further hardware.]]> external wall insulation - energy savings https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157815#Comment_157815 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9613&Focus=157815#Comment_157815 Fri, 28 Sep 2012 23:18:46 +0100 djh Posted By: ikimikiBut for instrumenting up one or more houses, I gravitate toward the http://wirelesstags.myshopify.com/ type of system
I just had a look at that site. It says they don't yet have European approval. I'm not a radio expert but it also appears to have both a wider frequency range and a different channel spacing than is legal in the UK; I don't know whether that is a problem or not. It operates on a band that is shared by radio hams, so I guess any problems would be caught quite quickly.]]>