Ok so the roof joists are 3.3 meters so how much higher does the front wall need to be to the back wall to achieve a 15 degree pitch roof?
That would mess up planning regulations as the eves need to be less than 2.5meters high. Do you think I could still use 15pitch roof tiles if the height difference is 500ml? or might this cause issues I cant see?
If you've got tiles that need 15 degs of pitch and you only plan to give 8 degs then you are asking for trouble.
Not according to Pythagorous or I am really misunderstanding this which after my day I wouldn't rule out.
Ah, I think I been mistaking isoceles and changing the 90 at the same time.. Fk. Mr. HandyAndy - Really
Well yeah, if the roof joists are 3.3 and a pitch roof, the pitch(at ridge) will be at 1.65 centre so completely different height. Mr. HandyAndy - Really
????, if that was the case the joists wouldn't be 3.3 would they, as there would be two of them making up 3.3.
You're probably right. I guess there would be just a minor difference for overlaps(or no overlaps) at eaves. Mr. HandyAndy - Really
Seems like most of the tile makers don't go below 15degrees. So you would effectivey be making a flat roof, using firrings.
Forticrete do one at 10, but you would be lower than that too and I believe they have a vast amount of rules about using them at 10. You may need to consider sheet material
You'd have to use the inverse tan function, which is about 860mm. As you only have one length of the triangle.