you can simply a cap in order to efficiently protect the flue of your home chimney. In the market there are several types of chimney caps available, there are caps with one or more than one flues in them.
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BigTop 17 in. Painted Black Galvanized Steel Multi-Flue Chimney Cover This chimney hood comes in a painted black finish that will complement your home's exterior paint scheme. The hood size is x and it has a screen to screen size of x The base
How to Install Exterior Trim Around a Stone Chimney