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Question DetailsAsked on 4/16/2014

Should I seal the brick on my house and what should it cost to repoint a 2500 sf rancher?

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Here is a link to a recent answer I gave on repointing a brick house -

As for sealing, there are two very different camp on that. Some say absolutely not, because you will trap moisture in the bricks and wall and cause softening and failure of the mortar. Others, like me, feel that if you stop the moisture at the surface with a water repellent chemical like siloxane, then what is left in the wall will diffuse through the wall and find a way out. One thing is certain - once you seal, you need to keep it maintained by recoating every year or two, otherwise you WILL have moisture getting into some parts of the brick/mortar system and then getting trapped behind the intact sealant, which damaged the mortar and makes for wet mortar and bricks which can then spall when it freezes. Therefore, if you seal you are committing to a substantial maintenance cost through the years. Cost typically $0.50-1.25/SF depending on accessibility/height of wall, and whether needs pressure washing first.

Answered 6 years ago by LCD

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