"Sam" wrote in message
...
At the moment we have a flat-roof porch. basically there are big
wooden joists that extend a couple of foot over the front door. On top
of these is some chipboard or plywood or something similar which has
felt on top of that. SWMBO would like this replaced with a sloping,
tiled, porch.

Since half of the frame is there already, I was thinking all we need
to do is fit a batten higher up the wall and another on the outside
edge of the flat roof and run wood diagonally between them and fill
with noggins. Is this more or less right?

If so, once I have a frame what about tiling. Never done that before.
Do I just nail it on? is it easy? Are tiles expensive? Where do I buy
them from?

I know you can get plastic sheets that I presume are cheap and
probably require less support. Of course they probably won't look as
nice. However, I think they are available in black. Has anyone seen
any in "real life"? Does it look smart or is it best left for
carports? We have got a flat roof carport, which I was as thinking of
doing the same... but that's another thread.

Thanks.

What you describe sounds like an unsupported canopy
If that is the case it is likely that the porch is only a rectangular frame
bolted to the house wall and would sag at the front if you build a sloping
roof on to it
You should consider fitting 'gallows' brackets or posts at each corner to
support the front edge

Flashing will be needed at the top and should be cut into a mortar course

Tiles can be set on roofing laths nailed horizontally to the rafters on top
of the roofing felt
A little thought is needed here to get the tiles to fit the roof size

Nail some rows with aluminium nails

Then all you need to sort is a fascia and guttering to collect the water
running down the front of the roof (the flat porch roofs in my area were
built with a lip at the front so that the water drained off of the end away
from the door)

Everything available from a builders merchant or roofing supplies

Tony