Should You Have a Chimney Sealant Applied?

leaky chimney cracks, greenwich ctMany ways exist for chimneys to become damaged. One of the most common is through water intrusion, usually through cracks in the bricks and mortar. Having a waterproof chimney sealant applied can prevent this water intrusion entering the chimney and allow you to avoid the big costs associated with leaky chimney repair and rebuilding.

National Chimney Cleaners of Fairfield County, CT, and Morris County, NJ, would like to share some useful information on chimney leaks, chimney damage and chimney repair in general.

Do you have a leaky chimney?

Often, small cracks in a chimney’s bricks and minor crumbling of the masonry go unnoticed by homeowners. It’s not until more obvious issues arise that the homeowners realize there’s a problem. Common signs of a leaky chimney include:

  • White staining (efflorescence) on the exterior chimney masonry
  • Water dripping into the firebox
  • A strong, musty odor coming from the fireplace
  • Damp patches or staining on the walls or ceiling near the chimney/fireplace
  • A rusty, squeaky, hard-to-operate fireplace damper

Start with a chimney inspection

If any of these are happening at your home, it’s a good idea to schedule a chimney inspection as soon as possible.

A licensed chimney inspection will get to the core of the problem and determine why the leak is happening and how much, if any, collateral damage has occurred.

Your chimney inspector can then recommend the best methods for repairing the leak and the chimney damage. Once that’s done, a protective chimney sealant can be applied to help prevent more damage in the future.

chimney sealant application, morristown njWhat is a chimney sealant?

There are several types of chimney sealant products. Some of them merely fill in the cracks to create a barrier against water. The better products form a “vapor permeable” seal, which not only blocks water but also allows the bricks beneath the sealant to breathe and expel the vapors that would otherwise add moisture to the masonry surface.

Top-brand chimney sealants are effective on all types of brick (masonry) chimneys and will hold up and keep doing their job for as long as 15 to 20 years when correctly applied.

What about water damage that already exists?

If you schedule service to apply a chimney sealant, you may already be experiencing some level of damage to your chimney. If this is the case, the damage will need to be repaired before adding the waterproofing.

Water can cause a variety of problems to chimney structures such as deterioration of bricks and mortar, water can lead to damage to the chimney liner, the roof that abuts the chimney, and rusting of the fireplace damper just to name a few.

Severely damaged masonry eventually may cause the chimney to lean to one side and create a risk to human safety and the home’s roof. In extreme cases, water-damaged masonry can cause a partial or complete chimney collapse.

So you’ll want to resolve any water-related problems before having the sealant applied.

Chimney experts in Connecticut & New Jersey are standing by to help

National Chimney Cleaners provides chimney waterproofing along with all types of chimney repair services throughout Fairfield and Morris counties. We solve chimney issues and help homeowners keep their chimneys safe and efficient.

Speak with a chimney expert today at 800-631-6177. You also can reach us through our handy contact form.


Use an Experienced, Established Chimney Sweep Company!

Don’t take chances with uninsured, novice, roofers, unregistered business, no workman’s comp.
Our pros have to know what they’re doing when they put their heads up a chimney and to do that, chimney sweeps obtain specialized training and have years of experience in the field.