Covering/cladding external steel work

[kangarolf]

Hi all,

Looking for some advice about cladding/covering some external steel work. We have a gable end with a goalpost steel support and transom arrangement at the gable end.

What to do about hiding/covering the steels.

I could paint, timber clad, plastic fascia board...wondering if anyone has already done this and would be willing to share experience and some images.

Thank you all.

 

[stevie888]

I'd be rather more concerned about the threshold detail: has there been any proper design? Any BC involvement?

 

[23vc]

UK?

 

[freddiemercurystwin]

Good grief why is any of that on the outside, should all be set back. What do the drawings say? Oh wait ....

 

[^woody^]

The doors were left open and the horse has bolted.

EWI

 

[kangarolf]

BC involved, structural engineers drew up the structure and was installed as per their instructions..the steels are inline with the external course, dpc lapped up behind frame.

 

[kangarolf]

BC involved, structural engineers drew up the structure and was installed as per their instructions..the steels are inline with the external course, dpc lapped up behind frame

 

[freddiemercurystwin]

Wow who signed off their drawings? Structural engineers are often lazy and either don't give a crap or don't understand cold bridging, that's why you have designers. Even if you did EWI as per suggestion above you've gotta get flashings and cills etc to be integrated with the glazing. Alternatively I guess you'd wrap all the steel in aerogel and then say 50mm Celotex or similar and then clad it with aluminium flashings, assuming BC would OK with that and you still have the same really fiddly flashing connections. Shocking and easily avoided.

 

[kangarolf]

Ok, thanks for the replies. It's nice to get some advice.

So I think the big problem here is that the steel is not within the insulated envelope of the building?

It does only rest on the outer course..then we have the cavity with insulation and the inner course has insulated plasterboard.

There was no detail on the structural drawings indicating that there be a padstone across both courses and the steel be placed further back within the cavity (attached is the padstone detail for the foot of the goalpost it's all on the outer cavity).

There will be render and cladding going on that end of the building so I will have some depth to play with.

I think I'm being told to get as much insulation in there as possible beneath the final finish so that it doesn't stick out beyond the final wall finish and cause trouble with water/run off?

Thanks.

 

[freddiemercurystwin]

What insulation is in the cavity? Are there cavity closers between the two skins of masonry? I suppose if the steel frame is isolated from the inner skin with insulation and an inner skin it's not so bad, what's behind the steel at the head?

 

[kangarolf]

Not much in the cavity..it's only a 60mm cavity so it's 50mm. Cavity closures up the sides and the roof has 240mm (2 layers of 120mm pir) which extend all the way to the header steels..they dont quite encompass the entire depth of the steel but the bit that is left has the insulated plasterboard over it.

Thanks