what is the pitch of my roof

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Kam1984

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don't know how the builder is adamant this is 17+ degrees. I have been outside and asked several times and he is confident it is made slightly above 17 degrees.
I have used my own online resources and doing it based on counting bricks from the outer wall to the existing house wall.
Simply put, for my 3400mm length extension, it requires a rise of 1030mm ish (so just over 1m) .
So counting brick courses - i'd say that is 14 brick courses (75mm per course x 14)
I only count 12 brick courses. even looks like just 10 courses from the photo ,but he showed the outer wall is 2 bricks lower when looking it directly from the back.
How is he still so adament its 17 degrees? no more bricks need to go against the existing house side.

So maybe its not as simple as counting courses of bricks?
 

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A little less than 10 courses according to the line. What does your drawing show? What tiles are being used? Stick a tape up: you don't need to count bricks when you have access
 
yea, so 10 bricks is 750mm. that makes it just over 12 degrees.

am i missing something though - it is just the bricks you see here that determine the angle. maybe he is seeing something different. maybe the wood stuff that goes ontop has a higher angle?

I would go outside, but its pitch black and dangerous out there. i'll try tomorrow. I just need to be assured. IF it is wrong, is it quick and easy to add a few bricks to increase the angle?
 
As above, use a tape measure. Then check the angle but you are right the vertical would need to be 1030 to achieve 17°. Assuming the height is 750mm the angle is about 12.4° atm. In theory you can simply add some height to get to the desired angle assuming the height works for planning or PD or the junctions where it meets the house etc. BTW why does the coursing go all out of kilter just above the window, or is it being rendered, in which case why is it brick anyway?
 
freddiemercurystwin said:
As above, use a tape measure. Then check the angle but you are right the vertical would need to be 1030 to achieve 17°. Assuming the height is 750mm the angle is about 12.4° atm. In theory you can simply add some height to get to the desired angle assuming the height works for planning or PD or the junctions where it meets the house etc. BTW why does the coursing go all out of kilter just above the window, or is it being rendered, in which case why is it brick anyway?
Click to expand...
what do you mean by out of kilter?
The bottom of the brickwork was laid about a month ago - we have had a huge delay in re-commencing due to some internal beam work plus holidays.
 
The string certainly isn’t at 17 degrees. But where is the roof going to end up, relative to the string?
 
endecotp said:
The string certainly isn’t at 17 degrees. But where is the roof going to end up, relative to the string?
Click to expand...
that is what i am hoping someone can help answer. maybe there is something more than just counting bricks.
 
Sure.
Anyway. Update for anyone who cares. After worrying about this all day I woke up and checked from the inside and it is actually 13 bricks. That's still only 16 degrees. However I called the roofer who said they will set the wall plate and rafters to the required level, whether that's 17 if I prefer - and after that if there is a requirement for more bricks to fill gap that they will do that ,not the brickies.

I also saw some YouTube videos where the roof rafters are put up first before the triangle part of the brickwork is built up.

Still may be wrong but that's the conclusion.
 
Actually it's 17.2 degrees, built with NASA-level precision.

I'm guessing the angled string line wasn't there when the wall was being built?

I still don't understand all the missing pointing either.
 
Ivor Windybottom said:
Actually it's 17.2 degrees, built with NASA-level precision.

I'm guessing the angled string line wasn't there when the wall was being built?

I still don't understand all the missing pointing either.
Click to expand...
I took the photo whilst the wall was being put up. The pointing is now done .

The strings were put up and then bricks layed. But the string it not the angle as the starting point is 2 bricks lower. So not sure the purpose of the string. Or maybe he had a different way to measure it. Or maybe he was saying it'll be 17 degrees + when finished , not just the bricks.

Regardless, hopefully it's the last I deal with him as the roofer is saying he'll ensure it's 17+ degrees and if that means it needs an extra few bricks, he will lay them.

And as I say, many YouTube videos of extensions place the wall plates and rafters before even building the brickwork up. So must be each to their own. I just get involved at every step because I have trust issues
 

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