8 Safety Tips to Consider when Working with a Chimney Crown 8 Safety Tips to Consider when Working with a Chimney Crown
A chimney crown is an accessory placed on top of a chimney to shed water and seals the top of the chimney. It is very important to construct a chimney that is properly built or its purpose will not be fulfilled. Poor construction of a chimney crown can cause deterioration and failure. Most problems that chimney’s have if the chimney crown is not properly built is efflorescence, freeze-thaw erosion, spalling and water damage. Another important function of a chimney crown is to close off the space between the chimney wall and flu liner, to shed water clear of the chimney and prevent formation of moisture and its entry. Here are some tips to consider when working with a chimney crown.
Inspecting Chimney Liners
Always inspect chimney liners. Old worn out liners are very dangerous and could be a cause if fire and carbon monoxide poisoning especially if these liners loses its stability. Burning embers can fly out and cause fires.
Make sure you chimney crown has a warranty. Stainless steel or copper is the way to go since these have a lifetime warranty. Galvanized chimney crown is also an option but only has a limited warranty.
Choice of Material
Using cheap material for a chimney crown can be very dangerous and can be a cause of fires as well.
Entry of Animals
Animal should not be able to gain entry to the home through these chimney crowns. The cap should be strong and have a heavy-duty mesh to keep out animals especially ones who can do a lot of damage. You need to protect the inside of your home from these animals because most animals who try to come into your homes are the ones who are scavengers like raccoons who can cause deadly rabies when bitten.
Water should be sure to be kept out of the flue. The chimney interior should be protected at all times. Often times, multiple flues should be used to ensure that the inside of the home would be kept from all types of weather. Remember that a chimney is an open vessel to your home.
A good-sized chimney crown should not interfere with draft. The draft determines how well smoke is drawn out and up your chimney. The cover of the cap should be at least 5 inches above the flue tiles it is covering, having more clearance than 5 inches is also recommended.
Embers should be kept off the roof. The mesh size will determine to keep embers out. Recommended size in ¾ inch sized mesh. Anything smaller could ice up in the winter and could block the chimney causing dangerous back drafts inside the home which is also very dangerous.
Chimney crowns should be able to withstand strong winds. Chimney crowns should be secure on top of your chimney. If you live in a residential area that is windy, takes extra measures to keep the crown on and make sure it stays on.