I don't know the brand in the picture, but I can assure you, none of them are insulated polycarbonate. They certainly will be warm (hot) in the summer but cold in the winter months. I have built four greenhouses, all different manufactures, and it is the same for them all. I have two greenhouses and have now wrapped them both with heavy-duty, outdoor bubble wrap, trying to keep the cold out and the warmth in. Time will tell if my investment was worthwhile.
