Extension: odd roofline

[joe_thomas]

Hi folks.

We're planning an extension for our 2 bed cottage.

One of the main things to solve before going too far is the new roofline, and how it intersects with the existing cottage. We have a clay pantile roof.

The reason it's not simple is that the boundary for our site runs at an angle from one corner of the cottage, meaning we can't build in a straight line on one side of the site.

We'd like a vaulted ceiling in the new section, so we'd need a ridge beam, rather than ceiling joists. Something I've been considering in the designs...

I've attached a couple of screenshots of rough designs, the blue highlighted sections are the existing cottage, and you can see the angle required on the left.

Thoughts on simple roof designs that will be structural with a vaulted ceiling and work with the angle? (Preference at the moment is number 3. 2 has the added complexity of an angled roof over the wall, which would make gutters difficult...)

Thanks

 

[a twig]

Unless you are a keen aviator or drone flyer you will never see the roof from this angle in reality. I’d personally base your decision on what you want the elevations to look like from ground level, and which one will be the most cost effective to build and easiest to maintain (probably option 1 I would have thought)

 

[malcolm]

I would get rid of no.2 as a rising roofline will look silly. I prefer no.3 but would consider making the gables and side roof square to the extension rather than the existing house. Doesn't feel right to follow the lines of the original part when the extension is built at a different angle.

 

[Stevers]

There are I think a couple of promising (and potentially easier) options missing:
5) An L shaped roof with gable at each end of the L (the KIS approach).
6) Run a pitched roof across the extension at right angles to the original building, and join that to the original building with a little bit of pitched roof to the original to eliminate a valley gutter and maintain the roof line.

 

[Stevers]

Further to my earlier post, an 'L' shaped roof on left, something that might work better on right.

 

[joe_thomas]

Thanks for the replies @Stevers @malcolm @a twig

Stevers you've done what I spent the other day working on in more detail, and it's definitely the way to go for simplicity, strength and aesthetics.

Now to spend the winter months planning it in far more detail and figuring out if we can ever afford it!

Cheers

 

[Stevers]

It does seem to be the modern way to not carry anything forward from the original building!