Now, let's determine your lintel measurements.
The lintel is a piece of iron in the shape of an L that is positioned underneath the top row of bricks. It's important to have the following measurements so we can make sure that the fireplace door does not interfere with the lintel. If you are unsure about this step, check out the additional information, posted as blue question marks, or call one of our technical sales representatives at 1-800-919-1904.