Professional chimney waterproofing for Greenville SC's high-rainfall climate. Vapor-permeable waterproof sealant protects masonry brick and mortar from water infiltration — without trapping moisture inside the chimney structure.
Greenville SC receives an average of 51 inches of rainfall per year — significantly above the national average of 38 inches. Masonry brick is a porous material that absorbs water with every rain event. Over time, water absorption cycles cause accelerating deterioration of brick faces, mortar joints, and the internal liner system.
The correct solution is not a standard masonry sealant or paint — these trap moisture inside the brick and cause spalling. The correct product is a vapor-permeable waterproof sealant that blocks liquid water from entering the brick from outside while allowing water vapor generated by chimney use to escape from the inside out.
Effective chimney waterproofing is a complete system — not just sealant on brick. Every component that allows water entry must be addressed for the treatment to be effective.
Professional-grade vapor-permeable waterproof sealant applied to all exposed masonry surfaces. Two-coat application ensures full penetration into brick pores and mortar joints. Sealant is certified compatible with historic and modern masonry.
The chimney crown is the primary water entry point for chimneys in Greenville SC. CrownCoat elastomeric sealant fills hairline cracks and creates a flexible, waterproof membrane over the crown surface — preventing water from reaching the liner and masonry below.
Factory-built chimney chase covers on newer Greenville SC homes are often galvanized steel that rusts through in 8–12 years. Stainless steel or copper chase cover replacement eliminates this leak point permanently.
The chimney-to-roof flashing joint is the second most common water entry point after the crown. When flashing is in good structural condition but separation has occurred, re-sealing with a chimney-rated flexible sealant restores the weather seal without full flashing replacement.
A properly fitted stainless steel chimney cap stops rain from entering the flue directly — eliminating direct water infiltration at the flue opening. Also prevents animal entry and includes a mesh spark arrestor.
Waterproofing is applied only after a Level 1 inspection confirms the masonry is in suitable condition to seal. Applying sealant over active cracks or deteriorated mortar seals in trapped moisture — inspection prevents this.
Vapor-permeable waterproofing applied after inspection. Written price before any work starts. All Greenville SC neighborhoods served — call to discuss your chimney.