low pitch, How do I roof this?????

[jimAuk]

Hi

As the picture below, we are wanting to create an extension with the foot print as below (6.50 x .50)

But I am struggeling as to the roof design as we are (as far as I can see) restricted by the 3 first floor windows preventing us from getting a pitch greater than 12 deg.

I was thinking of running from the the ridge on the diaganal from the inner corner of the main house at first floor windor to the point bottom right and then pitching down either side to creat a semi hip.

I've heard that if you marine ply and double felt the roof, building control are OK with you fitting tiles that aren't at the specified minimum angle.


Any advice welcome please?

 

[^woody^]

What about a flat roof?

 

[freddiemercurystwin]

Building Control may but should not allow tiles to be used for a purpose for which they were not designed, even with double boarding or a bigger lap 12° is pushing it for traditional tiles.

You can get sheet roof tiles that mimic tiles that go down to about 10° though for eg http://www.monier.co.uk/products/product-catalogue/product-range/product/plegel-05.html

Or you can do a proper flat roof if you prefer with a felt or edpm or similar or personally I like Zinc, there is also lead and whilst it will outlast you it comes at a premium.

 

[jimAuk]

I am trying to replace the flat roofs on the other extensions! So no flat roofs please.

 

[freddiemercurystwin]

Flat rooves will last 20 years provided they are fitted correctly, metal Flat rooves are a different breed, fitting tiles to a pitch at which they are not designed is naive and shortsighted.

 

[noseall]

Build a gable on 6.5m run and have a valley gutter against the existing left elevation.

You may have to alter one of the windows.

....or just build a flattie.

 

[jimAuk]

We just don’t want a flat roof, they look rubbish!

Is a practice to do a compromise? I.e a flat middle section (sort of the area of the current lean-to roof, but then pitching down as hips from there?

This will then give from ground level the facing slope of tiles , but at a pitch of about 33 degs.

The other advantage would be the lean-to roof can remain on the build to keep main house weather tight whilst build is in progress???

We would then also like to add a roof dome to the flat section to let more light in


http://www.roofingsuperstore.co.uk/...rbonate-100x100-including-insulated-kerb.html

 

[joe-90]

I'd say you've cracked it Jim.

 

[jimAuk]

Thanks Joe.

We are realy pleased and the roof dome will help as the current lean-to area could be quite dark as it would in effect be "inside" with no direct light.

I know it is a flat roof section, but I see this as more benift than a 100% flat roof extension. For the flat roof section what is the best material? Fibre glass?

 

[masona]

I'm guessing without seeing it, you could have a lot higher pitch roof either way depending how much you want to spend, you could do away with the windows and put in velux windows in the new roof area instead

 

[freddiemercurystwin]

So you're solution is to combine a flat roof you think will look rubbish a dome rooflight which looks hideous and a pitched roof! Each to their own!

Zinc & lead flat roofs look very pretty IMHO and are quite contemporary and look nothing like your typical flat roof in felt or similar, each to their own though.

 

[jimAuk]

So you're solution is to combine a flat roof you think will look rubbish a dome rooflight which looks hideous and a pitched roof!

YES!

 

[jimAuk]

a dome rooflight which looks hideous

We are now going with this instead of the dome light.

2 x 4m Will "join" the old and new togehter very well, and look good on the FLAT roof

 

[topend]

you could try decra lightweight roof tiles minimum of 10 degrees would do the job

 

[Nige F]

Loose the plastic finials and twiddly bits - and probably the gutter and you have indeed sorted it

if it`s surrounded by a metal roof on the flat - leading onto the tiled area.