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Mortar is used between bricks, cinder blocks, or stone to bind them and fill any gaps. It is made from sand, a binding agent (cement or lime), and water.

6 votes
Accepted

Will colouring mortar weaken it?

What is mortar doing on the roof???? you mean brick siding up to the roof or on the chimney? Regardless, adding mortar dye will not weaken the mortar if used properly. … To use a different colored mortar on a repair where visible, sounds pretty incompetent to me. …
shirlock homes's user avatar
9 votes

How to repair mortar that is crumbling?

If the mortar is crumbling and flaking, it MUST be removed. It is a tedious job, bit to assure a good solid surface, you have to remove all loose mortar, key it, and point all the joints. …
shirlock homes's user avatar
5 votes

Contractor suggests caulking cracks in chimney, is that the right solution?

This is the same question you asked a couple of days ago. BTW, NEVER use silicone caulk on chimney masonry cracks, especially if the crack passes through. There are special masonry high temp caulks fo …
shirlock homes's user avatar
2 votes
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What type of mortar would I use to seal cracks in our chimney?

This involves removing all loose and damaged mortar, then pointing all the joints with a portland cement mortar. If you have never done this kind of work, read up on it. … Remove as much loose mortar as you can to assure the masonry caulk sticks well. …
shirlock homes's user avatar