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Hi all,

I am planning the construction of a porch extension. I want to tile it
to match the rest of the house, rather than having a flat roof, but as
it will extend about 1.5m away from the house, the pitch will be too
low. To increase the pitch a bit, I thought about doing something like
the following:

http://www.k-roofing.co.uk/images/ba...slate_roof.jpg

By putting in the flat bit on top, I can increase the pitch. Does this
type of roof have a name? Without knowing its name, it's quite
difficult to find out any more details about it, such as how to
construct it.

thanks,

dan.

[soup]

wrote:
Hi all,
I am planning the construction of a porch extension. I want to tile it
to match the rest of the house, rather than having a flat roof, but as
it will extend about 1.5m away from the house, the pitch will be too
low. To increase the pitch a bit, I thought about doing something like
the following:
http://www.k-roofing.co.uk/images/ba...slate_roof.jpg
By putting in the flat bit on top, I can increase the pitch. Does this
type of roof have a name? Without knowing its name, it's quite
difficult to find out any more details about it, such as how to
construct it.

A variation on a Mansard roof?
Is the 'Flat bit at the top at a minimal slope (to clear water) but
looks flat from the ground?
(IANA roofer)

[RubberBiker]

The lower portion is called a "mitred slate hip" - probably with
concealed lead soakers.

The upper portion you could just call a "flat lead roof".

[Dave Plowman (News)]

In article
,
RubberBiker wrote:
The lower portion is called a "mitred slate hip" - probably with
concealed lead soakers.

The upper portion you could just call a "flat lead roof".

Or a recessed zinc one?

--
*Avoid clichés like the plague. (They're old hat.) *

Dave Plowman London SW
To e-mail, change noise into sound.

[RubberBiker]

Or a recessed zinc one?

Ah - I didn't look carefully enough, you're probably right!

[Malcolm]

wrote:
Hi all,

I am planning the construction of a porch extension. I want to tile it
to match the rest of the house, rather than having a flat roof, but as
it will extend about 1.5m away from the house, the pitch will be too
low. To increase the pitch a bit, I thought about doing something like
the following:

http://www.k-roofing.co.uk/images/ba...slate_roof.jpg

By putting in the flat bit on top, I can increase the pitch. Does this
type of roof have a name? Without knowing its name, it's quite
difficult to find out any more details about it, such as how to
construct it.

thanks,

dan.
Had this problem with a ground floor extension. We wanted to match the
roof tiles bur the slope was too shallow so the Architecht specced an
under layer of Onduline sheet (a corrugated sheet). Waterproof for the
last 7 years although somewhat exposed to the west.

Malcolm

[The Natural Philosopher]

soup wrote:
wrote:
Hi all,
I am planning the construction of a porch extension. I want to tile it
to match the rest of the house, rather than having a flat roof, but as
it will extend about 1.5m away from the house, the pitch will be too
low. To increase the pitch a bit, I thought about doing something like
the following:
http://www.k-roofing.co.uk/images/ba...slate_roof.jpg
By putting in the flat bit on top, I can increase the pitch. Does this
type of roof have a name? Without knowing its name, it's quite
difficult to find out any more details about it, such as how to
construct it.

A variation on a Mansard roof?
Is the 'Flat bit at the top at a minimal slope (to clear water) but
looks flat from the ground?
(IANA roofer)

The permissible angle of a roof is down to what its made of. Utterly
impermeable surfaces like zinc or lead can be flat, thatch needs 50
degrees or so.

However even flat laed will tear in the cold due to shrinkage. So its
conventional to use a lapped expansion joint and some slope.