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Found 32 results for the keyword ‘Mortar’

  • Materials for repointing brick.

    Special "mortar chisels" fit perfectly between the bricks, allowing you to get rid of loose or poor mortar without disturbing the brick. Whenever you are going to add mortar to existing brickwork, you must make sure that the layer of new mortar will go as deep as it is wide. That is because it ...
  • Vapour barriers and Showers

    There is a lot of debate about whether to put a vapour retarder (vapour barrier) on an insulated wall behind shower tiles.  The code has not historically been specifically clear on this so we get lots of different interpretations.  What the code does say clearly is that we should not have two vap...
  • Working with Mortar in Hot & Cold weather

    Seasonal tips for working with masonry.SUMMER    Summer Moisture Content:If too much water is drawn out of the mortar before it sets, the bond joint will not be good.Most clay bricks, calcite bricks and stone do not require pre-wetting because of minimum absorption. However in extremely hot weat...
  • It is all wet behind the shower tiles. Why?

    Ed writes from Ajax, Ontario : All 3 walls of my bathroom shower stall are finished with 4" ceramic tiles and are in good shape. When I had to remove one of them, I discovered that the drywall was behind it was so wet that I had to put a fan on it over night to dry it out before I could glue...
  • Chimney inspection check list.

    From top to bottom:1- Check the spark arrestor or rain cover, whichever you have on your chimney. Its most important function may in fact be to keep animals and birds out of your chimney.2- The liner needs to be in good shape. Check the part that is visible from above, and occasionally have a c...
  • What do we do with an old brick wall that has no weep holes?

    Gary from Hamilton, Ontario writes :I know that brick veneer homes have vent holes in the lower rows to allow air to equalize the pressure and help keep water out. We have just bought a 50 year old solid brick (two layers of brick) house. I notice there are no vent holes and it doesn't appear t...
  • Can I paint my brick fireplace?

    Yes you can paint a brick fireplace but not of course inside the firebox.The first thing to realise is that once you paint it, you cannot un-paint it. The paint will be worked into the small holes in the brick and will not come back out.First clean the brick as best you can, probably using TSP.L...
  • A look at restoring historic masonry.

    Andrew is restoring Toronto's Old City Hall, resetting, repairing even replacing some of those old sculptured blocks that sit high up on the wall.One of his challenges is making mortor that will act and look like the original stuff. One way that he accomplishes that goal is to grind up whatever ...
  • Repointing historic brick & testing a repointing gun.

    Leigh Bamford is a young tradesperson who takes historical restoration, even just old house repair very seriously. With five years of experience, she insists on using old materials and old techniques on old buildings.RemvoialRather than using a power grinder to remove the old mortar from between...
  • Patching massive concrete

    Marian from Baltimore Ontario has a big hole in her foundation wall where a steel 'I' beam was removed, as you can see in the photo she sent us. Her contractor filled it in with mortar and bricks. She would rather fill it with concrete.So we set up a block of concrete with a similar hole, and c...