Waterproofing

Leaking chimneys may need to be waterproofed in addition to re-pointing failed and or deteriorated mortar joints on the exterior of the chimney. Sometimes re-pointing alone does not solve the water entry problem, the masonry and brickwork can absorb water like a sponge.  To test for this we are able to perform a Masonry Absorption Test (MAT) by measuring the rate of absorption. Efflorescence stains or whiting on the exterior of masonry is another problem caused by water penetration. Some areas of concern with water entry are: water stains on the ceiling and walls, rusted fireplace accessories and glass doors, deteriorated masonry or metal firebox assemblies, deteriorated exterior mortar, chimney settlement and more.

Re-pointing

Re-pointing also known as tuck-pointing is a method of replacing cracked, failed, or deteriorated mortar joints between brickwork. The joint is cut out using either grinder or chisels to an appropriate depth; the joint is packed with fresh mortar and struck with a similar style striking tool. Re-pointing your chimney will give it a longer life and enhance its appearance.  A large amount of the masonry found in our service area is portland based mortar. We do see lime-based mortar as well. Lime-based mortar can also be re-pointed, but using a different method. For more information on re-pointing lime-based mortar please click on our Historic icon.