I bought a 30x31 carport to go over my 28' camper and was told I needed upgraded supports for Pennsylvania winters. When the installers came they charged an extra $150 because it was to be installed over a "residence'. Shady in my humble opinion. We had a snowstorm with 2-1/2 feet of snow and the roof collapsed and damaged my camper. I was told, by the rep from Alan's Factory Outlet, that they wouldn't warrant that amount of snow... even though I paid the upgrade and it was within the 1 year warranty period. I had to turn it in to my insurance, not get full value and had to contact a construction firm to take it down...$1400 out of pocket expense. I will NEVER buy anything from this company. I feel I was deceived and they don't REALLY honor their warranty. Buyer beware!