I have a 1930 house made entirely of brick, not frame with brick veneer. We are going to replace majority of the windows on both floors. Since the current windows are all too small, we will have to knock down some part of brick and enlarge the opening. I saw on Youtube that people use some kind of saw and cut the masonry like cutting a cake. Then they put on lintel immediately to support the weight coming from above the enlarged opening. My question is, is this (lintel) sufficient to ensure proper support? The width of the wall is close to 1 foot (maybe two brick width). will one lintel (which is usually a couple of inch wide) be enough? Please help. We are going to hire contractor for this job. All of those that we interviewed seemed very suprised to know my house was solid brick because they always deal with framed houses. I want to make sure they know what they are going to do. Thank you.