I have a new Pent shed 16 x 10, I want to put guttering on it, does it need to be on all 4 sides, or just the lower side, which is at the back. When it rains it drips off all 4 sides, which to me suggests it does require guttering on all 4 sides, but all the pictures I come across for pent roofs only shows it located at the rear lower side, many thanks
would really appreciate some advise.