Flat roof and solar

[LSB]

Our DIY new build has a flat roof (12 degrees).  This is huge at 24m * 9m and will be metal.  It's a barn conversion so we are limited to this design.

I'm being told that you can't have in-roof solar on flat roofs, is that really the case or have I just not found the right supplier.

Our planning does not allow us to go any higher than the top roof height, but also says we must have solar and we don't have space for ground mounted.

The roof is pointing south with nothing stopping the sun so is an idea location.

I don't want to cover the whole roof due to the size.

 

Thanks

 

[JohnMo]

1 hour ago, LSB said:

flat roof (12 degrees)

So not a flat roof (for insurance purposes).

 

You can have them on a 12 Deg roof, but winter performance will be utter rubbish. So I would tilt on stands to to a higher angle. Depending on width of roof the panel could go on the low side and still be below the ridge height and be tilted up.

[saveasteading]

12 degrees is far from flat. Not just for insurance but anything.

Most steel buildings I built were 6 degrees (10%). That required careful detailing and sealing.

12 degrees is fairly normal. steeper than that is very steep for metal.

 

So yes,  you have the wrong supplier. 

Do you really man 'in-roof'. It is easier, safer  and cheaper to have it mounted on the surface.

[LSB]

11 minutes ago, saveasteading said:

12 degrees is far from flat. Not just for insurance but anything.

Most steel buildings I built were 6 degrees (10%). That required careful detailing and sealing.

12 degrees is fairly normal. steeper than that is very steep for metal.

 

So yes,  you have the wrong supplier. 

Do you really man 'in-roof'. It is easier, safer  and cheaper to have it mounted on the surface.

I appreciate it's easier to mount, but I don't want to pay for a huge metal roof to promptly cover it up with panels.

We are very limited to our planning, the difference in height between low and high is 2 blocks high so 430mm.

Needless to say the planning and SE just specify solar without any details about mounting etc.