14.8 roof pitch

[Dean Daly]

hello, I'm achieving 14.8 degree pitch, am I worrying over nothing as it's almost 15 degrees or should I do what I can (substantial work required) to achieve 15 degrees?

 

[Dean Daly]

I'm hoping for a slate looking finish, Cambrian or Eternit thrutone fibre cement slate also with velux

 

[^woody^]

What are you using to measure an angle to tenths of a degree?

Normal tolerance is to within 1°

 

[Dean Daly]

Sorry to be vague but I don't know. My neighbour and I are both building a single storey extension, he's got someone else in and slightly ahead of me, I'm not at that stage yet, ideally I want us to lay the roof as one, that's the pitch his builder advised. maybe he meant just under 15 degrees.

 

[noseall]

What are you using to measure an angle to tenths of a degree?

I use trig, what do you use Woodplops - squinted eye, thumb and a stick?

 

[Nige F]

last time I had to do it , it was in minutes and seconds and a book of logs

 

[^woody^]

Hey, don't knock the squinted eye, thumb and stick method. That was used long before you whippersnappers and your log tables and fancy trigonometry came along.

 

[^woody^]

For the OP though, don't worry about one fifth of a degree - your angle finder is not that accurate anyway. And a degree either way won't make much difference

 

[tony1851]

The deflection in the rafters would be more significant than 1/5th of a degree.

 

[chappers]

I had an issue with a roof that had cambrians specced years ago and Redland technical said they would probably be ok as low as 12 degrees anyway

 

[Waseem1]

You should be OK but if your using slate you should use permavent easy slate strips

 

[mdh1]

Don't use Cambrians. I have had nothing but problems with my roof at 15 degrees. I would use a tile that has a few degrees extra to give you a bit of guarantee they might actually keep the rain out.