Connecticut is known for its hot summers and harsh winters. So as far as commercial roofs are concerned, the choice of materials, shape and structure needs to be made in order to prevent any weather-related issues.

Shingles are the most popular choice of roofing material, because they can be built to withstand mostly any type of climate. They can offer good insulation and are easy to waterproof. Nonetheless, the typical asphalt shingles are very light and can be easily detached from your commercial roof by severe storms, which are a common thing in this part of the US. Dark shingles are not recommended, either, as they can attract too much sunlight and can cause problems during the typical Connecticut summers. The best choice would be organic asphalt shingles. They are especially created to face heavy rains, snows and harsh winds. Another good thing is that they can last for 20 years.

Slate can be a good option for your commercial roof. It is long lasting and strong, and can support a lot of heavy weight. Synthetic slate is yet another excellent alternative, because it is less heavy and can absorb water.

Metal could be another great idea, especially since nowadays metal roofs are treated with waterproof solutions. Look to local roofers like New England Masonry at http://www.nemasonry.com/new-england-roofing for roofing products and selection.