Green Building Forum - Aluminium Cills (sill) Wed, 10 Jun 2026 02:39:25 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159572#Comment_159572 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159572#Comment_159572 Mon, 22 Oct 2012 08:00:31 +0100 borpin
I have found this http://www.rbb-aluminium.de/bilder/fbs_Prospekt_Englisch_%2009.pdf which is exactly what I am after but no UK supplier as yet.]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159573#Comment_159573 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159573#Comment_159573 Mon, 22 Oct 2012 08:09:44 +0100 owlman Posted By: borpin...............I have found thishttp://www.rbb-aluminium.de/bilder/fbs_Prospekt_Englisch_%2009.pdf" rel="nofollow" >http://www.rbb-aluminium.de/bilder/fbs_Prospekt_Englisch_%2009.pdfwhich is exactly what I am after but no UK supplier as yet.

Why not order direct from Germany Brian, I do it all the time for loads of things.]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159578#Comment_159578 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159578#Comment_159578 Mon, 22 Oct 2012 08:40:06 +0100 davidfreeborough
http://www.fenbag.at/presse.html

David]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159580#Comment_159580 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159580#Comment_159580 Mon, 22 Oct 2012 08:50:32 +0100 jamesingram http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=9191]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159581#Comment_159581 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159581#Comment_159581 Mon, 22 Oct 2012 08:51:37 +0100 PeterStarck Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159591#Comment_159591 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159591#Comment_159591 Mon, 22 Oct 2012 09:15:45 +0100 wavy Russell Timbertech do alu cills to go with their windows but the fixing detail is a little unusual.]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159596#Comment_159596 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159596#Comment_159596 Mon, 22 Oct 2012 10:18:23 +0100 James Norton http://www.wemico.com/ recently, very helpful, economical and did what was asked.

J]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159608#Comment_159608 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159608#Comment_159608 Mon, 22 Oct 2012 12:41:56 +0100 fostertom Posted By: wavyRussell Timbertech do alu cills to go with their windows but the fixing detail is a little unusual.Just about to order same with latest Russell order - what's unusual? Can be powder coated - limited standard col range, or any col. To order, they can also make up e.g. vertical bay-corner facings, which clip into groove in frame jamb same way as the cills clip into the frame cill under-groove.

Looks similar to http://www.wemico.com/trims.html , type WE77.

The most pukka EWI cos like Sto supply similar cills but with stop-ends, which appear to be push-on mouldings, so no water can 'fall off' the cill ends into the interior (behind the render finish) of the EPS that embeds the cill ends.
Do we think such a stop-end is necessary?
Is just an effective seal between the cill-top and the render-thickness edge and/or abutting EPS surface (behind the render) adequate?
Or no such seal, as seems normal UK EWI practice?
We do seal the vertical joint between the frame face and the render-thickness edge by e.g.
http://www.wemico.com/window_beads.html
but there seems to be no comparable aid to sealing the more testing joint at the cill's top surface.

I just rang Wemico. The push-in cill end caps they offer are purely visual 'downstand' closures of the end section where exposed outboard of the render face. Alternatively they can weld in that closure before powder coating. One client even asked for a welded-on upstand end but Wemico reckon that's overkill, that's generally not done. One thing they can't to is bend the end of the cill up to form an upstand.]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159611#Comment_159611 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159611#Comment_159611 Mon, 22 Oct 2012 13:02:33 +0100 Peter Clark
Please explain,


Posted By: fostertomOne thing they can't to is bend the end of the cill up to form an upstand.


WE77 on this page:

http://www.wemico.com/trims.html

appears to be what you want?

Peter]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159630#Comment_159630 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159630#Comment_159630 Mon, 22 Oct 2012 13:52:47 +0100 fostertom Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159640#Comment_159640 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159640#Comment_159640 Mon, 22 Oct 2012 14:26:54 +0100 mark_s Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159644#Comment_159644 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159644#Comment_159644 Mon, 22 Oct 2012 14:46:27 +0100 Peter Clark
Peter]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159647#Comment_159647 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159647#Comment_159647 Mon, 22 Oct 2012 16:37:59 +0100 wavy
incidentally, RBB do push on end caps with an upstand:
http://www.rbb-aluminium.de/bilder/fbs_Prospekt_Englisch_%2009.pdf (see page 4)]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159660#Comment_159660 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159660#Comment_159660 Mon, 22 Oct 2012 21:22:21 +0100 djh Posted By: davidfreeboroughNo closer to home, but there are some interesting insulated aluminium sills available from Fenbag in Austria: http://www.fenbag.at/presse.html
They look interesting but I'm confused by one point. They show diagrams with an arrow going between the outside and inside of the XPS with the legend "U-wert 0.85 W/m²K". That doesn't seem terribly impressive and not very plausible for XPS. So I suspect I'm misinterpreting something. What are they claiming?]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159681#Comment_159681 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159681#Comment_159681 Tue, 23 Oct 2012 08:21:43 +0100 davidfreeborough
I assume it represents the Uw installed value down to which the sill wouldn't degrade Uw installed. In other words, the minimum Uw installed at which it provides zero thermal bridging (Psi=0) with the construction shown. Does that make sense?

David]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159692#Comment_159692 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159692#Comment_159692 Tue, 23 Oct 2012 10:03:21 +0100 fostertom http://www.rbb-aluminium.de/bilder/fbs_Prospekt_Englisch_%2009.pdf
so my question is - necessary, or just analy perfectionist? and verrry expensive I should think.

I wonder whether http://www.wemico.com/window_beads.html could be mitred so that, after coming down the vertical frame face, the seal cd be run near-horizontal out across the cill top?
I see these sections as not complete in themselves, but providing a consistent corner-with-depth ready for a quality mastic bead. I guess that the variants with a 45o wing e.g. 3712 are supposed to make that unnecessary?]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159703#Comment_159703 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159703#Comment_159703 Tue, 23 Oct 2012 12:31:28 +0100 wavy
I wonder if a strip of (very thin) Illbruck / Compriband stuck to the cill along the jamb line before the insulation is installed might work better? A standard render stop would then allow the cill to move slightly whilst maintaining a seal.]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159707#Comment_159707 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159707#Comment_159707 Tue, 23 Oct 2012 13:46:06 +0100 fostertom http://www.youtube.com/watch?v=_OloldpTF-g&feature=related
then they do go your Compriband route, but (looks like) 20mm wide, applied to the flat top of the push-on endstop to seal more to the EPS, it looks, than to the render-thickness edge.]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159710#Comment_159710 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159710#Comment_159710 Tue, 23 Oct 2012 13:56:32 +0100 djh Posted By: fostertomYes, that's the babys http://www.rbb-aluminium.de/bilder/fbs_Prospekt_Englisch_%2009.pdf so my question is - necessary, or just analy perfectionist? and verrry expensive I should think.
I guess it depends on what the reveal is made from. In my case of render over straw, I think endstops are worthwhile insurance.]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159711#Comment_159711 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159711#Comment_159711 Tue, 23 Oct 2012 13:59:36 +0100 fostertom Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159777#Comment_159777 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159777#Comment_159777 Wed, 24 Oct 2012 13:15:34 +0100 djh Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159778#Comment_159778 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=159778#Comment_159778 Wed, 24 Oct 2012 13:21:15 +0100 fostertom Posted By: wavya strip of (very thin) Illbruck / Compriband stuck to the cill along the jamb line before the insulation is installed might work better? A standard render stop would then allow the cill to move slightly whilst maintaining a seal
Posted By: fostertombut (say) 20mm wide ... to seal more to the EPS ... than to the render-thickness edge
applied straight to top surface of cill without end stops, shd be done]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=161795#Comment_161795 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=161795#Comment_161795 Tue, 20 Nov 2012 10:20:27 +0000 nickmaybury Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=161887#Comment_161887 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=161887#Comment_161887 Wed, 21 Nov 2012 10:44:41 +0000 MikeRumney
We've enclosed our EPS with the intention of "retro-fitting" the cill.
As it's likely to be wood we were going to bed it onto strips of nearly-set mastic,
so that any water getting past the edge/upstand mastic could "run" off down the rendered base reveal,
which has a slight fall on it.
So basically, sticking it onto the outside, with some drainage back-up.

Anyone throwing their hands up in horror?]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=161893#Comment_161893 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=161893#Comment_161893 Wed, 21 Nov 2012 11:24:54 +0000 fostertom
We did cills entirely made of rendered EPS, a 100thk piece 'laid flat' to falls - so far so good after 2 winters. Finished with silicone paint in hope of improving run-off and evening-out the water running down the wall below, to avoid pattern staining (such 'stone' cills are often traditionally glossed) but that not so successful - tops greening with algae now, which can prob be cleaned now and then.

(Right click on image>View image>then you can zoom in)]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=161894#Comment_161894 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=161894#Comment_161894 Wed, 21 Nov 2012 11:30:49 +0000 fostertom Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=186243#Comment_186243 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=186243#Comment_186243 Sun, 13 Oct 2013 11:31:51 +0100 borpin http://www.spectrumarchitectural.com/cills.php. I got the basic cills in the end but as you can see they do all sorts including upstand cills.]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=186247#Comment_186247 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=186247#Comment_186247 Sun, 13 Oct 2013 12:44:00 +0100 Rex http://www.finisharchitectural.co.uk/. Generally very pleased. But, they are ali, powder coated.

Rex]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=186248#Comment_186248 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=186248#Comment_186248 Sun, 13 Oct 2013 13:11:15 +0100 Rex
Finish Architectural bent the ends of my cill to form an upstand.

Rex]]> Aluminium Cills (sill) https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=186263#Comment_186263 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9731&Focus=186263#Comment_186263 Sun, 13 Oct 2013 16:08:12 +0100 woodgnome