soffit/box end with no barge board

23vc · 12 May 2018

I'm trying to do a pitched vaulted roof, with about 150mm soffit depth at the fascia, but no barge boards on the gable, as I'm doing an undercloak and cut brick style.
I'm trying to work out how to noggin it so the soffit can return round the corner and finish in a box end kind of thing. A bit like the picture attached. I know how to do it if you've got a barge rafter, as that picks up the end, but in my case there is no barge rafter.
I'm at the stage where I'm going to build up the gable, and am thinking of just running a single noggin across from the bottom of the rafter, to catch the return edge.
Not really sure what I'm doing to be honest so hoping someone can set me on the right track!

themiddleagedun · 12 May 2018

In that situation the last few courses of brick can be corbelled out to cover the end of the fascia board.

23vc · 12 May 2018

Thanks, how’s it secured though, as that corner must be pretty weak as there’s nothing there. Screw to the brick?

noseall · 12 May 2018

23vc said:
Thanks, how’s it secured though, as that corner must be pretty weak as there’s nothing there. Screw to the brick?

You build a deliberate fascia-stopper brick corbel in this situation, as said. You would begin building it about 6-8 courses down from where the top of the fascia will finish.

23vc · 12 May 2018

Cheers. I’ve not done anything as nice as your corbelling, so I guess I’m just looking for ideas of how to just stop the fascia return at a box end (but without a barge board) as shown on the pic I posted. I reckon a noggin from the last rafter may work, but not very good at visualising these things

^woody^ · 12 May 2018

Where there is no barge board, you would not return the fascia around the gable, but just stop it flush with the front wall.

23vc · 12 May 2018

Thanks. It’s more how the far end of the fascia which will have a little return back to the front edge of the wall (the depth of the soffit), is supported when there’s no rafter anywhere near (as in the rafter is the other side of the cavity wall). I think what I’m trying to do is a bit wierd, I was just trying to keep it as simple as poss, but I’m now thinking I’m better including a barge rafter and board, as I can then do a normal box end.

23vc · 12 May 2018

Think I’ve worked it out, after walking the dog and staring at loads of roofs. No need for gable noggins from the rafter, just a slight return from fascia back to the wall, which I guess I can just use some 4x2 or whatever to carcass and give it some strength. If I’d have been any the wiser, I’d have corbelled it as it looks great, but too late now!
Thanks for the replies

noseall · 12 May 2018

23vc said:
No need for gable noggins from the rafter, just a slight return from fascia back to the wall, which I guess I can just use some 4x2 or whatever to carcass

Correct.
We leave the soffit and fascia boards long so that they protrude past the wall (it can be trimmed later). You can then add timbers fixed to the underside of the last couple of rafters and extended so that they become cradling for your soffit box.

23vc · 12 May 2018

Spot on, thanks.

23vc · 13 May 2018

Spent most of today creating massive amounts of brick dust cutting the bricks to the verge angle with my 4”grinder, not fun and had to be very nice to the neighbours!
Anyway I think I’ve messed up again, albeit not too hard to fix, the undercloak at the eaves will kick up and rest on the fascia (I assume?) so the brickwork needs to also follow the same line and kick up, I’m guessing you’d want to have the fascia fitted (or at least know the fascia height) before finishing the cut verge bricks so you know not to go below the fascia height? Am I making any sense?

^woody^ · 14 May 2018

23vc said:
Am I making any sense?

No. Did you wear a hat whilst out in the sun?

^woody^ · 14 May 2018

noseall said:
You build a deliberate fascia-stopper brick corbel in this situation, as said. You would begin building it about 6-8 courses down from where the top of the fascia will finish.

I don't like that closer there.

23vc · 14 May 2018

^woody^ said:
No. Did you wear a hat whilst out in the sun?

I didn’t, which together with my lack of hair I think explains it.

Would you fit the fascia before the undercloak, so you can lay the last bit of the undercloak on top of the fascia?

^woody^ · 14 May 2018

Yes the undercloak goes above the fascia and over/into the gutter

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soffit/box end with no barge board

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