A Chimney Without A Rain Cap

It has been said a chimney without a rain cap is like a house without a roof.

Chimney without a rain cap - CHIMNEYS.COMImagine how much water would come into your home during a rainstorm if you had a hole in your roof twelve inches square. Chimney flues may be even larger than that, so where does all that water go? It runs down the chimney and seeps into the bricks and mortar, settling behind the firebricks.

There is little air circulation in the chimney (unless you’re using it) and no sunlight, so the inside of the chimney stays wet long after the rain stops. This moisture erodes the mortar joints and weakens the brick. Add to this a freeze/thaw cycle during the cold months, and you have all the needed ingredients for a deteriorating chimney.

chimney without a rain cap - CHIMNEYS.COM
Jimmy Golden of Chimney Repair

Take our word for it: even though you can’t see the damage happening, it’s there, slowly deteriorating your beautiful fireplace and chimney: all because you have a chimney without a rain cap. This is a particularly important consideration if you have a metal firebox incorporating a metal damper and smoke shelf. All fireplace dampers made of metal are subject to this deterioration as the water mixes with creosote and mild acids are formed. Even chimneys serving woodstoves are in need of a cover.

Listed below are several good reasons to have a chimney rain cap:

  • Keep out rain, snow and sleet.
  • Keep out animals and birds.
  • Keep out leaves, twigs and other debris which could lead to a blockage or chimney fire.
  • Keep sparks from leaving the chimney and igniting nearby combustibles.
  • Help eliminate wind induced downdrafts.

Chimney caps are made from a variety of materials. The most common are galvanized, stainless steel, and copper. Rain caps made of stainless steel and copper will last much longer than those made of regular galvanized metal and normally carry an extended warranty.

Spending a little extra for a good quality chimney cap will be money well spent and there will be no danger of rust staining the chimney. So, if you have a chimney without a rain cap, now you know what’s happening.

~ Golden’s Chimney Lining

~ Asking for Chimney Information ~

After reading an article, you can ask a question about that article. Replies will come from Chimney Professionals, and sometimes from homeowners, who are giving their answer based on the information you provide. Remember that they are providing answers SIGHT and SITE unseen! 

CHIMNEYS.COM recommends that you use these comments to better inform yourself to discuss your chimney and venting issues with a professional whom you call to your home to evaluate the issue.

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