We had a part of our roof replaced about 2 years ago and everything went well so we invited them back to do the entire roof (minus what they already did). This was relatively late in the year and we live on top of a hill with ALOT of wind. The shingles didn’t seal well because of the cold and sun didn’t hit hard enough to activate the adhesive. They came back several times throughout the winter to ensure everything was ok. In summary, may not be a great idea to do the roof close to winter if you live in a windy area and are not going to get hit by direct sunlight. However, this company provided excellent customer support and didn’t leave our side until everything was sealed. This is the type of company you want putting shingles on your roof.