Shallow Roof Pitchs

imitation

I'm looking at the pitch of a roof on my house at the minute, in the plans its 23 degrees, the builder reckons it will end up being under 20 degrees( around the 17-19 degrees mark) due to some sort of error in the plans. I'll be grabbing my engineer for this one for certainly, but what are the main things to watch out for in such a shallow roof, I know increasing the overlap in the slates is the main thing.

Poor Uncle Tom

I don't think you will get slates at 17-19 degrees unless you have a sealed/watertight roof underneath them.

observer2u

Slates need a somewhere between 25-30 degrees - clay tiles something similar. Can you not increase the ridge height sligthly?

Head The Wall

observer2u wrote: »

Slates need a somewhere between 25-30 degrees - clay tiles something similar. Can you not increase the ridge height sligthly?

Ridge height is normally dictated in planning, although OP doesn't state if it's the ridge of some other roof section.

imitation

It's a H roof. I'm talking about the section between the two roofs, can't adjust the ridge height as otherwise it will come above the other two roofs.Its bad news if artificial slates cannot be used between the two roofs to say the least, as the rest of the roof will be done like this.

Charlie-Bravo

if you are stuck, you could use an <SNIP>'...this might increase the thickness of the roof, the pitch remaining the same but should be within the overall context of the planning granted. If you get stuck and require an alternative pitch/method of construction, you could always do a pre-planning consultation or Section 5 application (both as a last resort) to get a direction from planning on what they will accept without having to re-apply and attract public opinion!

Mod Edit: do not link to a specific company, it is against the charter.

morning delight

astrofluff wrote: »

if you are stuck, you could use an <SNIP>

Any idea of the extra cost involved?

imitation

Turns out the builder wasn't right in his measurements first time around (5pm job), and its actually correct, so I can once again sleep at night (until the next time :rolleyes:). Thanks for the advice everybody !