The EWI Industry: Time for Reform?

I have previously written about the risks of installing External Wall Insulation without due consideration to the building, the system design and adequate site storage facilities and site management. The article, titled, ‘The Risky Business of Covering Up’ was  published in the CIOB’s Construction, Research and Innovation Journal can be found here under the heading ‘published material’…

EWI Install to High Rise Block

I have been predicting that we would see a glut of external wall insulation failures for the last three years and I am now seeing strong signs that my prediction is correct and I suspect that even I have not fully grasped the scale of the problem yet. I am currently working on a supplementary article to follow the piece I wrote in the CRI Journal and to that end have a trip to Germany planned to review their EWI system failures.

To my mind the industry is simply not open enough to airing and discussing their failures and in fact has a very strong defence mechanism that kicks in to counter negative web publicity wherever it appears. I have experienced this first hand when I recently blogged that ‘The Defects are Often Built In.’  I was following and photographing a Midlands EWI High-Rise installation purely as an academic piece and was careful to not mention the contractor or the particular scheme. Apparently I was not careful enough because within 24 Hours I received a call from a manager who project manages these schemes for the contractor concerned. He explained that he had received a call from a ‘concerned industry insider’ and that he wanted to discuss my blog. In fact he was incredibly reasonable about the blog and was more concerned about the quality of work seen in my blog pictures. One picture was flagged with a large number of defects and he was in complete agreement that the work was appalling. His prime concern was being proactive in getting the work rectified before premature failure placed his employer at considerable financial risk. We had a very professional discussion and I closed by commending his approach wishing him good luck in getting the work rectified. Twenty four hours later I received a second phone call from the Managing Director directly responsible for the site and the work. His approach was very different, he claimed that the photograph was only good for the time it was taken and that I didn’t know what had happened afterwards. His ‘experts’ were telling him that the work was good and there was a reason that mechanical fixings were not fully installed at the same time. I disagreed and stated that the installation process was clearly detailed in the BBA certificate. He suggested that they had an installation process that had been signed off by their designer but of course if this deviated from the BBA certification process then the BBA certification process would no longer be valid. In essence he claimed that there was a reason that only one mechanical fixing was being installed into a 1200 x 600 insulation panel until the adhesive had dried, after which point they would go back and install the extra fixings required. This was patent nonsense because their approach to installing insulation panels was inconsistent on every high rise block and every elevation of each high rise block. Some panels had zero fixings, some had one, some had two some had three…. You get the picture. If there was a separate site installation process deviating from the BBA certificated process then this in itself is a problem but clearly there can only be one process and inconsistency of approach demonstrates clearly that the process is not being followed or managed. There was a subtle suggestion that coming to site to discuss how things are done might present some ‘opportunities’ for my business whilst continuing to run with my damaging blog might be damaging to my business. I try to be pragmatic wherever possible and compromised on removing the name of the town, changing the photograph to one more palatable and removing the project value so the blog was as anonymous as it could possibly be. I refused the suggestion that I should take down the blog altogether.

What really fascinated me about this conversation is how quickly the EWI industry defence mechanism kicked in. I was told that the web is scanned daily for negative publicity and a concerned party from within the EWI trade association contacted the contractor within 24 hours of my blog going live. I was told that there is a possibility that my blog or website was possibly being specifically monitored due to my previous article on EWI system failures. I’m well aware that this sounds like some fantastic conspiracy theory but its rather more simple than that… EWI is big business and confidence in EWI system installations has to be maintained to keep the gravy train on track. Perhaps the great irony in all this is that I am a huge fan of EWI systems but my view is that they are consistently let down by inadequate design and  poor site practice and installation and some reform is needed.

What I don’t want to do is get into criticizing individual contractors but I am seeing more EWI insulation work done poorly than done well and I hold a view that inadequate design and poor site quality control are often the primary causes of failure. My research and writing on EWI failures is purely academic and aimed and at raising awareness with clients of the need to stringently manage site works. Secondly, clients need to understand their ongoing maintenance obligations with regard to protecting the long term guarantees on these systems. A client may have a £1m EWI system installed to a high rise block that he believes is guaranteed for thirty years but if they do not have a regular maintenance regime in place to inspect building joints, particularly around window and door frames, then they will hand their EWI system guarantor a rather large get out clause should the system fail prematurely. In my experience a very small minority of clients set up planned maintenance regimes once these systems are installed and yet the requirement to set up a regular inspection and maintenance regime should be clearly presented to the client at project handover. I have managed millions of pounds worth of EWI installs and not once was this requirement set out or explained to the client. The failure to set up a regular maintenance regime may well prove to be a great get out clause in some isolated cases but my experience is that, more often than not, the defects are built in and as my construction solicitor recently commented, ‘You cannot maintain a defect.’

The Department of Energy and Climate Change insisted that EWI systems came with a 25 year guarantee to facilitate rolling out EWI systems to the mass market and to that end SWIGA provide a guarantee that covers materials and workmanship.

The problem with SWIGA is twofold:

Firstly, SWIGA was essentially set up by the EWI industry and it is not what I would call an independent body. Secondly, if a client does experience EWI system failure that is reported to SWIGA then SWIGA will appoint the system designer or manufacturer to investigate that failure. This is hardly an independent investigation and one that is bound to develop into a circular argument as installers then appoint their own experts to counter the findings in reports generated by designers or manufacturers. I’ve seen this first hand on numerous occasions now and can see an EWI industry heading towards a tangle on internal conflict and dispute until they accept that they cannot self-regulate to the degree that they currently are.

EWI systems will continue to be a potentially great way of dealing with technically obsolete and ‘hard to treat’ properties but the industry is in danger of leaving a legacy of system failures and a subsequent tarnish that will be very difficult to remove unless wholesale changes are made.  I would suggest that adequate reform rather than the management of negative publicity is the way to maintain consumer confidence in EWI system installations.


8 responses to “The EWI Industry: Time for Reform?”

  1. Joh Houston avatar
    Joh Houston

    Fascinating. Your report rings true.
    I have and am carrying out investigations for clients on a range of properties with EWI over the past 8 years. The problems you describe are similar to what I have found on a range of building types. In addition the light-coloured northern and western facades are soiling due to organic growth has been a problem for at least 10 years and appears to be well understood in Europe. The industry in Europe is struggling to find a commercial solution which will remain clean but also comply with the biocide regulations. In the UK the soiling is attributed to all sorts issues including wetter winter, climate change local woodlands etc.

    I will be following your blog with interest.

    1. admin avatar

      Thanks John. I’m assuming that you are investigating properties in the UK? I also wondered whether your investigations were purely academic or whether you are working on behalf of clients who have these systems installed?

  2. Rae avatar

    I own my flat, factored by our Scottish L A, who “sold” the EWI system as solution to our expensive to heat properties. Probs evident from the start & reported- among them -broken edged cladding panels used at w/inserts, rainwater running straight over the verge trim at the roofline(no extension to the o/hang installed) saturating the walls/ ingresses to the extent that the “waterproof” insert render was washed off. Initial reaction was to inject silicon sealant into every “orifice”-made no diff. Extended w/sills do protect the small area of wall beneath them though! Long story – problems still not resolved since work “completed” Apr 2015. System manf/ installer/council just passing the buck insisting the verge trim “more effective” at shedding the water away! Never had insert render washed off before EWI installed!- Adjacent block has wet grid like marks on exterior walls after rain -outlining the shape of the cladding boards- is this the result of board shrinkage leaving gaps between the panels / rain going behind an ineffective verge trim at the roofline and exiting thro’ the exterior render- or both? I’ve been told that the bld will get checked “AFTER THE 12 MONTH DEFECT PERIOD ENDS”! I have contacted BBA recently (ack recd but waiting for full response) but not optimistic of a positive result after reading your article.

    1. Joe Malone avatar
      Joe Malone

      Rae, It makes no sense to check the building after 12 months defect liability period when there is such an obvious problem as boards showing through. If whoever bought and paid for this system ignores known problems or fails to report them to the installer then they may well find themselves in a dispute with the installer regarding contributory negligence. It isn’t an argument with any validity as far as I’m concerned but nevertheless, ensure the installer is informed and make it clear that failure to immediately inspect may well contribute to an increase in cost for remedial works.
      Can you tell us what system is installed and who installed it? Also pictures would aid in my providing better commentary?
      With regard to the potential for board shrinkage, this could be a problem but more so if phenolic boards are installed. We investigate a lot of these failures and the vast majority of failures are down to poor or inadequate design and terrible workmanship; the systems are much of a muchness though personally I would never specify Phenolic or PUR boards. It is in my opinion negligent to not provide an adequate overhang to prevent rainwater cascading down the wall face and at best you’d experience bio-deterioration, at worse, water penetration and system failure.

  3. Kevin avatar

    Hi. John
    I cut my teeth in EWI 30 years ago at the age of 19 then drifted away to a self employed builder life. When the green deal came along it was my opertunity to step back into an industry I knew. I set myself up to be a registered green deal EWI installer and was proud to say one of the few sole traiders qualified. I found it so difficult at an early stage to compete with the LTD company’s with there lower prices flash vans and glossy paper work . Worst of all were the customers lack of knowledge over the insulation. I thick they thought they where getting a freebe on the grant and backed with 25 years gaurantee all was well. When a system goes wrong it can cost twice as much to put right. Much like yourself I have been gob smacked at the standard in the industry . 3 years ago I knew it was going to go wrong so I bought a domain name I knew all we needed is a bad winter like we had this year and the boards will pop of . 25 years insurance backed company’s (don’t want to mention there names) don’t want an indipendant company with the ability to be able to point a direct finger at the rout problem . Example verge trim . It is designed to butt together with at best a silicon over the joint. This is a metal trim at best it will have a small joint approx 2mm. Any silicone is going to fail in a very short time . When I mentioned this to the industry I was told well what the chances of water getting to it as it is tucked under the verge of the tiles and the guttering. Yes that has some merit in most cases but as guttering and verge trim comes in 4 metre lengths and the gutters joints with time always fail. It means there is the possibility of that 2mm joint getting a lot of ingress of water. Who’s fault is it . The home owner for not maintaining the guttering and silicon joint (it’s not pointed out on the maintenance sheet) or installer or system designer. I got my tin snips out and fashioned a joint siliconedo it then pop riveted it together up close it looks Ugley like a worms back but it will last. The industry are just going to chase each others tail over who is to blame and it is not helpfull for the customer who may see his house massively devalued.
    There are others examples I know that I may share latter.
    Long live the sole trader.
    Regards Kevin C Coventry.

  4. Mike Perry avatar
    Mike Perry

    Am I getting more and more concerned that with the only requirement for companies to do GHGS funded EWI installation is Trustmark membership there is a worryingly large potential for shoddy work to be done, for any number of reasons (incompetence, rushed, done in bad weather, no scope in the schedules for delays due to unexpected prblems,,,,)?

    You bet I am.

  5. Carole avatar

    I am very glad to read your blogs. I am currently looking at the GHG to improve my home with my ultimate aim as a secondary measure to get double glazing as I am currently single glazed and freezing! I wanted solar thermal as a primary and gateway measure but I have been told I cannot get this without solid wall insulation-internal for many reasons is not an option so I have been looking at external – most of what I have read has made me very nervous and these blogs have confirmed my worries and as general public there is insufficient information available to be able to judged who and what would be appropriate and as the risks in a failure would be substantial and costly you have decided me that this is not a risk worth taking. I have emailed my MP of these issues and the anomaly of the GHG scheme not allowing other measures without solid wall insulation. so I will have to continue either hibernating during the winter or freezing but with the assurance that I have not risked my property. Thank you all.

    1. Joe Malone avatar
      Joe Malone

      Hi Carole,

      Just to add balance, you have to understand, that I only get asked to look at the failures, and despite the negativity, relating to EWI installations, found in these blogs, many systems are well installed, and will be durable in the long term, so long as the installation is well managed. I’m not anti-EWI, I’m anti-poorly installed EWI, and feel that there is insufficient protection for home owners when things go wrong.

      Kind Regards

      Joe Malone

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