Roof Carpentry/Angle Advice

I am about to start work on a new (probably block work then rendered) structure of an outbuilding which will be part "rebuilt shed" to house tools and lawnmower etc and second part home office.


I am trying to minimise costs by looking after the build myself and having tradesmen in as I work from home anyway. I have a bricklayer who will do the groundworks and construction no problem, but I am struggling with the carpentry and roof works, partially as the roof is not "standard" on the second part and changes its angle halfway along.


As you will see from the images, the boundary with the neighbour has the joint "sheds" with a shared back wall currently, which can stay/be rebuilt. I am undertaking the project with the neighbours also, as they are having their second shed rebuilt also (B1 on diagram)


The new roof should be relatively straightforward on A, A1, B, B1. The next section, where I want to run the wall along the boundary, changes direction at the end of the current shed (see join between sections B & C)


My brother is an architect student and has mocked me up this 3D model of how it may look, although we possibly don't need to have the height of the roof raising you go further along. I'm happy to have the roof the same height as A & B...


The point of concern is how the roof can be made to angle at the point that B & C meet and what the likely increase in carpentry/roofing costs would be compared to continuing the same width and losing some ground in our garden/ having a fence behind that, running where along the hedge line.


Any help and advice on this would be much appreciate, as I am on a pretty tight budget and want to maximise the space, but only if affordable and sensible to do so, given the added work of the change in angle.


Many thanks

Put a flat roof on it a pitched would be horrendous.

As above, it would look naff and 'forced'.

It will also cause you much grief in getting the angles and cutting right.

Flat roof, without a doubt.

Sorry, but your 'bro needs to brush up on his architectural and sketchup skills. Those drawings are not showing anything.

Is the issue the oblique angle to the boundary wall and how that half of the roof will be formed?

Build yourself a model of your arrangement with bits of cut up cornflake packets and a reel of masking tape. Try and get it to a reasonable scale, say 6" = 10' .
The current design looks a bit of a bear. the ridge plank becomes a purlin in the bent extension. I think its a better way to keep the slope on your side constant, right to the end and have a patched up and twisted roof on your neighbours side to join the various walls together and keep the water out. Try in out in cardboard first
Frank

No need for cardboard. How will he cover it?
May as well go with a flatty and save a lot of faffing about.

Anything you like on the flat side, felt on the bent side?
Frank

Thanks for the comments so far guys... The first parts (A & B) probably need to remain pitched as it is being rebuilt in partnership with the neighbours. However, the last area C could be a flat roof, but would need to be connected seamlessly inside, as the internal wall may not match where the roof changes.

I've sketched (please excuse my terrible attempt!) the only way I could think it could be - as if there are two completely separate pitched roofs, joined by another section, which has an angles that could be matched with thew block work also, as a small straight section to join thew two?

Might be way out, but not sure I can convince the neighbours to flat roof the lot as yet...

Thanks again

Forgive me, but your "C" bit in the sketch is now running parallel to the bent wall, not what you started off with?
P.S. have you cut up some cardboard yet?
Frank

get yourself one of these

mattyf84 said:

I've sketched

Click to expand...

That's completely different to the first lot of sketches.

Your sketches are confusing. Do you mean you'll end up with a building like this. If so just extend the same roof and cut a slice through. You'll end up with a sloping eaves.