Another roofing question

[staningrimsby]

Hi Guys,

Ive been working on my extension all day and am very close to having to construct the rafters, pitching plate etc.

I have a partialy sloping ceiling in my kitchen which is were the rafters meet an old 4x1 wall plate, after much deliberation i have decided not to try and match it up but to replace the wall plate and all of the old rafters.

I used a sliding bevel inside the kitchen against the wall then up against the ceiling to find the angle, drew it on a piece off wood the used a rafter square to find the angle wgich i think is 25 degrees, so to the questions;

1. Does the wall plate go on the inner leaf or the outer as on the original roof it is a 9" thick wall with the wall plate on the outer wall.

2. What is the minimum pitch that a roof can be ??? will i get away with 25 degrees again if i renew the lot ???

Cheers
Stan.

 

[noseall]

the wallplate could go on either but these days we fit it to the inner leaf.

it makes it easier to deal with fixing the restraint straps!

regards pitch - what kind of roof tiles do you intend fitting?

 

[staningrimsby]

Concrete lindum teracotas Nose so the match the main roof, as far as the restraining straps go im rendering the outside any way so i could fit them to the exterior outside leaf then render over them couldnt i ???

 

[noseall]

i,m not familiar with those particular tiles Stan sorry. if they are interlocking the chances are they should be fine.

why the reluctance to fit the plate on the more conventional inner leaf?

 

[staningrimsby]

Ive got a cavity on the new wall Nose, and not on the existing old wall so theres a good chance that the inner leaf wont line up properly with old wall its connected to, when the side of the kitchen comes down.

 

[SurreyRoofingEstimator]

(Sandtoft) Lindums are fine down to a 22.5 Degree pitch in the terracotta smoothfaced finish

 

[staningrimsby]

Cheers for that im off to order them today, hopefully they will have some idea how many i need if i give them the roof measurement.

 

[noseall]

finish the internal masonry high enough, so that the new wall plate and the joists that sit on it, line up with the existing joists/ceiling.

you could then add a false slope or rake to match the existing.

 

[noseall]

mmmmmm? you may have to disregard the above as you may not be able to sit the rafters at the same height as existing. i.e. the rafter tops will differ thus knackering up the lath run thro'.

bah!

 

[staningrimsby]

Cheers for that Nose, but i have decided if a job is worth doing then lets do it right, gunna replace all the rafters, ceiling joists, wall plate and pitching plate, then reduce the pitch of the roof to 22.5 degrees