Chimney crown seal as well as a complete waterproofing service is a great way for a homeowner to prevent thousands of dollars worth of masonry repairs in the future.
More Information on Chimney Waterproofing
The top most section of a masonry chimney is the crown or the “wash” of the chimney. This area is exposed to a great deal of rain, snow, and ice throughout the year. Due to common weather conditions cracks and holes will commonly form in the crown. From the ground view you will not see these cracks forming however, when they do water penetration begins create channels within the chimneys masonry construction. Over time these channels will push out mortar joints and degrade the chimney from the inside out. This effect will be greatly increased by freezing and thawing of water in the chimney during the winter season. The longer this issue is left unaddressed the more expensive the masonry repairs will become.
A crown coat sealant is an inexpensive solution to this scenario. The crown sealant will fill all cracks as well as prevent future cracks in the wash.
Chimney Waterproofing, in addition to a crown sealant, is the application of 100% vapor permeable, non film-forming, water repellent that penetrates and lines masonry pores.