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.

http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=9191

I've found Trueline quick & helpful so far but haven't actually ordered yet.
Russell Timbertech do alu cills to go with their windows but the fixing detail is a little unusual.

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.

That's the same page I referred to, nothing there about bending ends up or about forming an end upstand any other way. The end caps mentioned do something else, as I described.

Ah, different kind of upstand, sorry.

Peter

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?

Yes, 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 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?

Expansion - yes - so yr idea is prob best. I don't think the push-on endstops accomodate expansion - they look tightly fitted on
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.

I should say so! Or woodfibre, or even min wool batts, which may have shaped continental thinking and practice - UK's standard EPS maybe less critical.

Well I'm hoping to agree on GBF that at least for UK, using EPS, end stops are overkill - but prob something like

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

Not about alu cills per se, but ...

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?

.

I had my cills pressed by http://www.finisharchitectural.co.uk/. Generally very pleased. But, they are ali, powder coated.

Rex

Borpin, Rex...how far back did the cills go under the bottom of the window?