Chimney Crown Sealing

What This Service Involves

Even a structurally sound crown develops fine surface cracks that wick moisture into the slab during our long rainy stretches. Crown sealing lays down an elastomeric membrane that flexes with seasonal temperature swings instead of cracking like rigid coatings do. This treatment seals those hairline fissures and creates a continuous barrier that keeps water from soaking into the concrete and migrating into the chimney. It is an affordable, preventive step that adds years to a crown that is still in good overall shape.

Benefits

Bridges hairline cracks before they grow into structural problems; flexes with freeze-thaw movement without breaking down; low-cost preventive alternative to a full crown rebuild; keeps moisture out of the masonry and flue below

Our Process

1) Clean the crown of dirt, moss, and loose material; 2) Fill minor cracks and prime the surface as needed; 3) Brush or roll on a flexible elastomeric sealer; 4) Allow full cure and confirm complete, uniform coverage

What Affects the Cost

Surface area of the crown to be coated; amount of cleaning and crack prep required; type and grade of sealer applied; number of coats needed for full coverage; height and accessibility of the chimney

Best Time of Year

Seal the crown on a dry, mild day in summer when the surface is fully dry and the coating can cure before the rains return.