Don't go too shallow whatever you do. Flat roofs are a bar-steward and should be banned, never voluntarily install a flat roof nor buy a property with any.
Match the house if possible? do they run the same way?
Are you building it yourself? Roofing material would be a factor.
At shallow pitch like that you'd need extra overlap. Tbh have a look at house roof pitch and make it same/similar.minimum for slates is 20 degrees. not a big area so no need for a severe fall on it.
correct. just saying what the minimum is. i believe the same pitch as the existing always looks better.At shallow pitch like that you'd need extra overlap. Tbh have a look at house roof pitch and make it same/similar.