Waterproofing your Chimney
Most masonry materials absorb large amounts of water because they are porous. Common brick can absorb water and wick moisture to the chimney interior like a sponge. Mortar joints that are defective or improper mortar or brick can increase the tendency to absorb and move water to the interior of your chimney’s masonry structure.
Several products have been introduced to be used specifically as waterproofing agents for masonry chimneys, allowing the chimney to breathe out but not in. These are vapor permeable and allow moisture from the inside of the chimney to escape through the outside of the masonry. The waterproofing agent keeps water from absorbing in from the outside.
Chimney Repair Charlotte NC uses Chimney Saver Water Repellent to keep your chimney in good condition. The Repellents include a 10 year warranty and reduce water penetration by 99.9% according to the University of Wyoming’s ASTM testing.
The chimney crown or chimney wash is the top element of a masonry chimney, covering and sealing the top of the chimney from the flue liners to the chimney’s edge. A common problem with masonry chimneys is an inadequate crown construction from common mortar mix, which is the same mix used to lay the chimney bricks. This mortar mixture is not designed for years of weather abuse and will result in cracking, chipping, and deterioration, which all allow water to penetrate the chimney. Most sand and mortar mixtures crack almost immediately upon installation because of shrinkage! These cracks and missing pieces can lead to serious water damage in your chimney, making for an expensive repair. Fixing these problems now can save you money later!
Tuckpointing is the process of repairing a mortar joint in a brick wall, and comes from the process of tucking the mortar into a damaged mortar joint with a pointing trowel. This is critical maintenance because it keeps water from entering into the brick wall cavity, which can cause brick failure such as cracking. The brick face may even pop off the chimney, a condition called spalling. Fixing the cracks in the chimney’s joints can save costly repairs in the future.
The process of repairing a mortar joint in a brick wall is called “tuckpointing.” The term comes from the process of tucking mortar into the damaged mortar joint with the point of a trowel called a “pointing trowel.” Tuckpointing is a critical maintenance task and keeps water from entering the brick wall cavity. If water is allowed to get past the mortar and into the wall, brick failure may occur such as cracking or spalling (popping off of the brick face). Failure to fix cracks in your joints can lead to very costly repairs the longer it is left unfixed.
The damper stops heat from escaping up through your chimney when the fireplace is not in use. Without a damper or a tight-fitting set of glass doors, your home’s heat and money is disappearing up your chimney! Call us to find out more about throat dampers, top sealing dampers, and damper cap combinations.