pitch of hip end

southwesterly · 28 Sep 2012

I'm designing an extension to a semi with a hip end to the roof and need to know if the pitch of the hip end can be steeper than the front and rear pitches. I can draw it ok but the existing pitch angle is 35º, the end would be 45º. Will this cause problems when the roofers come to lay tiles?

thanks

catlad · 28 Sep 2012

I can not see a problem with the slating or tiling.

southwesterly · 28 Sep 2012

catlad said:
I can not see a problem with the slating or tiling.

thanks., I asked as one builder I spoke to said that profile tiles wouldn't work

AJ

denso13 · 28 Sep 2012

As above, tiling won't be a problem.

noseall · 28 Sep 2012

So long as you don't intend using bonnets or arris hips, rather use the ridge hips then you will be ok.

Be a challenge to cut the roof or are you having trusses?

The jack rafter splay plumb cut (top cut to the jacks or commons on the hip blade) will be a nightmare because it will not interject at 45 degrees rather it will be an acute angle.

PeakOakFrames · 28 Sep 2012

Irregular hips shouldn't be a problem for either the roofer or the carpenter.
Cutting an irregular hip is no more difficult than cutting a regular hip. You just have to do the maths and cut the correct angles.

tony1851 · 29 Sep 2012

Having different slopes on a hipped roof does cause carpentry problems at the eaves.
For a given projection of eaves each side, how are you able to arrange a level fascia board and guttering? A two or three degrees difference on each slope could be accommodated, but 10 deg. difference is a lot - see sketch showing the problem.
Why do the roof slopes have to differ?

Untitled

tony1851
29 Sep 2012
1

PeakOakFrames · 29 Sep 2012

Tony1851 - as I understand the OP it's the pitch on the hip plane that is different rather than the pitch rolling through along the main roof planes. If I have understood this correctly then the only difference would be in the length of the seat cut at the rafter foot which would be covered if a soffit is being fitted and therefore unseen. It's not a major issue at all.
Another option should you want to keep your pitches regular would be to put a Dutch gable in. Not sure how planning would react to this as they look quite agricultural. or you can have a raised half hip which are somewhat more common and look a fair bit neater.

tony1851 · 29 Sep 2012

PeakOakFrames said:
Tony1851 - as I understand the OP it's the pitch on the hip plane that is different rather than the pitch rolling through along the main roof planes. If I have understood this correctly then the only difference would be in the length of the seat cut at the rafter foot which would be covered if a soffit is being fitted and therefore unseen. .

OakFramer; I was fairly certain that the OP meant that the hip face was a different pitch to the other two planes and that the variation between 35 and 45 was not in one plane.

The sketch was intended to show, in one diagram, the effect that the different slopes have at the eaves, and the consequent difficulty he would have in lining up the fascias and guttering.

With respect, I have to differ and believe pitches differing to this degree will cause the OP some problems.

catlad · 30 Sep 2012

There is always a knock on effect in my experience when moving out of the norm, and will certainly test your brain later on.

noseall · 30 Sep 2012

A half hip would be more sensible as per POF.

Harbourwoodwork · 1 Oct 2012

southwesterly said:
I'm designing an extension to a semi with a hip end to the roof and need to know if the pitch of the hip end can be steeper than the front and rear pitches. I can draw it ok but the existing pitch angle is 35º, the end would be 45º. Will this cause problems when the roofers come to lay tiles?

thanks

More info needed, interesting problem

diynot

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pitch of hip end

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