Safe Chimney Installation
A fireplace can improve the value of your home and reduce heating bills. A chimney carries hot gases from the fireplace out of the home to prevent surrounding wooden structures from catching fire. A chimney may be constructed of masonry or metal, and each type has separate safety considerations.
- Install a chimney made of masonry if you want a permanent fireplace. A stainless steel chimney is more suitable when you need a replacement for a brick chimney that is not economical to repair. A stainless steel chimney must have an "A" rating from the Underwriters Laboratory.
- Check your building codes to ensure your chimney complies with local size requirements. Building codes typically specify the minimum amount of air space that a chimney must have.
- Comply with the safety requirements for the hearth if you have a masonry chimney. The hearth generally requires a fireproof backing that is securely attached to the hearth. A masonry chimney typically has specific regulations regarding its height above the roof.
- Install adequate flashing around a metal chimney to prevent rain and snow from getting into the flue. A wet flue can cause leaks in the chimney and cause smoke to come out of the house. The flashing should generally extend at least five feet from the chimney.
- Brace a metal chimney so that it does not bend over in heavy snow or wind. Install a support inside the house to prevent the roof from collapsing when you install the chimney. A heat shield is also required to keep the installation from catching fire if the chimney goes through the attic.
- Install a cap on the chimney to prevent animals from climbing down the chimney. A cap also prevents debris from getting into the chimney which can clog the chimney. Line the flue of a masonry chimney with terra-cotta tile and surround a metal chimney with fiber or foam insulation.