Green Building Forum - External fittings on EWI Thu, 28 May 2026 20:01:01 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=132553#Comment_132553 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=132553#Comment_132553 Mon, 30 Jan 2012 10:44:56 +0000 pmagowan
Surely there must be a common solution? For all the EWIers on here perhaps you will let us know your individual solutions.

My current best guess is;

for heavy loads (camera's etc) to use a backing plate of 10mm ply behind the mesh-reinforced render and recessed into the EPS. This would be fixed to the wall behind using 4 EWI fixings. The heavy load could then be attached as you would for a normal wall.

For light loads (downpipes?) just drill a hole in the EWI and squirty foam a rawl plug in.

For trellis (planting) have the trellis supporting it's own weight and secure the top as per heavy loads.

Questions;

Will this work? What size ply square would be needed? Is there not a standard way? Sto seem to have a cylindrical device to burry in the EPS but I can't get any info on it. Surely this is required in all EWI applications but is most problimatic in thick ones (200mm).

Sorry for bringing this up again.:confused:]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=132568#Comment_132568 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=132568#Comment_132568 Mon, 30 Jan 2012 11:52:43 +0000 fostertom External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=132569#Comment_132569 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=132569#Comment_132569 Mon, 30 Jan 2012 11:55:49 +0000 pmagowan External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200012#Comment_200012 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200012#Comment_200012 Fri, 11 Apr 2014 18:39:14 +0100 Jono
Not really the right place to put this, however, I didnt want to start another thread on EWI. I'm about to embark on renovation/ extension project on a solid wall detached property.

I want to add EWI (most likely EPS) and wondered whether there would be a problem with installing a balance flue gas fire place with flue coming out through the insulation both in terms of thermal bridging / combustion risk.

I'm interested in any thoughts/ opinions.

Many thanks,

J]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200036#Comment_200036 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200036#Comment_200036 Sat, 12 Apr 2014 11:54:04 +0100 Victorianeco
My EWI is now rendered and finished but no allowance was made by the installers during installation.]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200039#Comment_200039 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200039#Comment_200039 Sat, 12 Apr 2014 12:35:44 +0100 Nick Parsons
''I want to add EWI (most likely EPS) and wondered whether there would be a problem with installing a balance flue gas fire place with flue coming out through the insulation both in terms of thermal bridging / combustion risk.''

Is it really B/F? Or fanned flue? A lot will depend on the heat recovery. Ask the fire manuf'r. Alternatively use a small amount of Rockwool EWI at that point. ( BTW, I wonder if acrylic renders are made to take heat?)]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200047#Comment_200047 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200047#Comment_200047 Sat, 12 Apr 2014 15:02:08 +0100 adi
http://www.fischer.de/en/Home/Product-Range/Product-Selector.aspx/cpage-productdetails/pcategory-1001001973/product-510971/usetemplate-productdetails/

Worked really well. Only issue I had was when I hit a mechanical fixing under the render holding my insulation to the wall, however that issue would apply to what ever method you used unless you knew exactly were you needed to place fixings before you render the wall.]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200060#Comment_200060 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200060#Comment_200060 Sat, 12 Apr 2014 17:56:14 +0100 Victorianeco External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200087#Comment_200087 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200087#Comment_200087 Sun, 13 Apr 2014 11:21:34 +0100 Nick Parsons
? Spell-check ''off-cut''?]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200090#Comment_200090 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200090#Comment_200090 Sun, 13 Apr 2014 11:32:38 +0100 Jono
I will have another look. The plan is to install something like this http://www.stovax.com/stoves/traditionalstoves/traditional_gas_stoves/huntingdon_30_gas_stove.aspx

I will see if I can find out from stovax what they recommend.

Good point about the render - will check it out.
Thanks again,

J]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200094#Comment_200094 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=200094#Comment_200094 Sun, 13 Apr 2014 11:52:39 +0100 Victorianeco External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202294#Comment_202294 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202294#Comment_202294 Tue, 20 May 2014 18:36:19 +0100 Freddy External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202296#Comment_202296 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202296#Comment_202296 Tue, 20 May 2014 19:45:35 +0100 fostertom External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202299#Comment_202299 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202299#Comment_202299 Tue, 20 May 2014 19:56:06 +0100 n2e4ewi External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202305#Comment_202305 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202305#Comment_202305 Tue, 20 May 2014 21:29:30 +0100 n2e4ewi External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202312#Comment_202312 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202312#Comment_202312 Tue, 20 May 2014 22:23:11 +0100 n2e4ewi External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202333#Comment_202333 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202333#Comment_202333 Wed, 21 May 2014 11:32:52 +0100 fostertom
What do you say about
Posted By: fostertommethods sold for mounting TV dishes. Whatever, it's going to be a big thermal bridge
you have substantial steelwork bolted to wall and running right out through the EWI.]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202354#Comment_202354 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202354#Comment_202354 Wed, 21 May 2014 17:42:42 +0100 jamesingram External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202357#Comment_202357 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202357#Comment_202357 Wed, 21 May 2014 17:52:02 +0100 n2e4ewi External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202360#Comment_202360 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202360#Comment_202360 Wed, 21 May 2014 18:55:32 +0100 n2e4ewi External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202482#Comment_202482 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202482#Comment_202482 Fri, 23 May 2014 10:42:19 +0100 Freddy Fostertom - yes it would be more sensible to add posts and thereby make the door canopy effectively free standing but other work on the house means that local planning will not allow an enclosed porch and, apparently a post would contravene that.]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202487#Comment_202487 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202487#Comment_202487 Fri, 23 May 2014 12:43:26 +0100 fostertom External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202504#Comment_202504 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202504#Comment_202504 Fri, 23 May 2014 17:44:09 +0100 Freddy External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202558#Comment_202558 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202558#Comment_202558 Sun, 25 May 2014 08:50:22 +0100 n2e4ewi External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202564#Comment_202564 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202564#Comment_202564 Sun, 25 May 2014 12:58:17 +0100 Peter_in_Hungary External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202565#Comment_202565 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202565#Comment_202565 Sun, 25 May 2014 13:00:59 +0100 Peter_in_Hungary Posted By: n2e4ewiFreddy, be careful with fitting verticals direct to EWI if they going to be wood this is been noted by warranty and insurances companies as a major issue in damaging the EWI the details I sent are the same product for our gate post so limit the risk to EWI. I would only take the vertical down as far as required to support the angled brace
Why?
I would have thought (as presumable does fostertom) that taking the vertical down to ground level would relieve any vertical stress on the fixings (and therefore the EWI) leaving the fixings just to hold the structure against the EWI which would be a turning force with the ground level as the turning point. The fixings then only have to hold against the pull out force applied by the turning motion and the EWI is just acting as a spacer. In this scenario the weight is carried by the ground and there is no downward force on the fixings (and therefore a risk of bending the fixings and crushing the EWI) which otherwise there would be if the verticals stop short of the ground]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202592#Comment_202592 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=202592#Comment_202592 Mon, 26 May 2014 08:18:53 +0100 n2e4ewi External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=205692#Comment_205692 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=205692#Comment_205692 Thu, 17 Jul 2014 23:48:02 +0100 Shevek Posted By: fostertomDrill a 40mm hole (not that easy thro the glassfibre mesh, which tends to catch and pull) thro the EWI, fit a length of plastic pipe into it, filled around and inside with squirty foam, big washer or ply plate capping that, at or below the finished surface, long screw/plug thro that, down middle of the filled plastic pipe, clamping all tight to the old wall faCE. Can be installed during EWI fitting if reqd position known.
How do you drill a 40 mm hole through 250 mm of EPS? Use a hole saw and dig it out a bit at a time?

And what sort of screws could we use? Where do you get 300 mm long masonry screws from?

Will a top coat of acrylic render stick to a stainless or galv washer? Found these:
http://www.accuscrews.co.uk/penny-washers/14693-HYW-M6-40-A4.html

And what about simply embedding some plywood into the EPS (say 150 mm square to spread the load), beneath the top and base coat, and screw fixing through the render to it?

And one more idea: we have quite a bit of 300 kPa EPS. Could we substitute that where we're fixing things and then use spiral screws for fixing points?

(I'm fixing downpipes, garden taps, lights and a gas meter + box)]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=205699#Comment_205699 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=205699#Comment_205699 Fri, 18 Jul 2014 00:24:48 +0100 fostertom Posted By: Shevekwhat about simply embedding some plywood into the EPS (say 150 mm square to spread the load), beneath the top coat and base coat, and screw fixing through the render to it? WUFI says that outer zone of the EPS, just behind the render, will spend most of the winter saturated. This is not because of liquid water penetration - EWI acrylic render is waterproof - but due to water vapour condensing - the render is vapour-open. Which allows it to dry out again when the sun shines.]]> External fittings on EWI https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=205700#Comment_205700 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8514&Focus=205700#Comment_205700 Fri, 18 Jul 2014 00:29:17 +0100 fostertom http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=11050&page=1#Item_3 .]]>