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.

learn more… | top users | synonyms

13
votes
5answers
28k views

Why do builders say that wet concrete/mortar is not as strong?

I have been watching a few videos demonstrating the mixing of mortar and cement and a constant theme is that you must not have the mix too runny. I cannot fathom the reason... Does anyone care to ...
5
votes
1answer
2k views

How do I darken new mortar in a brick wall to match the older mortar?

I had some bricks replaced. Unfortunately, the mortar is really light. How do I stain it a darker gray, so that it matches the original mortar? Is there a product that I can buy at a big box store?
2
votes
1answer
499 views

What type of mortar should I use?

I'm going to replace these cracked bricks on the front of my home(see pic). What type of mortar should I use? Type S, N, or M? Is there a way to determine the type of mortar that was used when the ...
1
vote
2answers
4k views

Can I change the color of the mortar in my brick wall?

We recently built our home and the mortar color between the bricks is dark gray, we did not pay attention to it and because of that the brick face is looking duller due to the standard gray mortar. ...
4
votes
7answers
81k views

What water:cement:sand ratio gives the strongest mortar?

A typical mortar mix ratio is 1 cement : 3 sand. But what is the water ratio? Is it 0.5:1:3? Would a 0.5:1:2 ratio be a stronger mortar? Our next door neighbor has a dog that digs like a pro. The ...
9
votes
4answers
74k views

What mortar should I use for 8x10 and mosaic wall tile?

I will be tiling a tub/shower area using 8x10 ceramic tile with glass mosaic tile accent rows. I see about half a dozen varieties of thin-set on the market: Weights: - 25lb - 50lb Types: - ...
2
votes
3answers
22k views

What mortar should be used for flagstone?

I once read about a mortar that starts as a powder I could put in between my flagstones, and then just wet it down and it would harden in place. Do you know what this product is?
6
votes
4answers
1k views

How can I stop mortar plugs from popping out of slab holes?

Our termite people plugged their dozens of chemical insertion holes using a regular grout and a putty knife. Needless to say the plugs are popping out left and right. (They tell me that is normal, ...
2
votes
2answers
22k views

How can I remove grout and mortar from a drain?

I accidentally poured some mortar and grout down my bathroom drain when I was cleaning the remains of a bucket of mortar after tiling the kitchen. The drain was plugged up pretty bad so I tried to ...
5
votes
1answer
6k views

How to fix a through hole in a concrete step?

Here're two photos of a through hole in a step in an enforced concrete staircase in an apartment building. The step is about one inch thick, the hole is about three inches wide and appeared many years ...
5
votes
1answer
395 views

How to repair mortar that is crumbling?

The interior of my stone basement foundation wall has been mortared it is starting to sand off. What is the best way to seal it off so I can paint it again? The home was built in the 20's and has no ...
2
votes
2answers
1k views

Would replacing old mortar for new prevent water from seeping through brickwork?

Would replacing old mortar for new prevent water from seeping through brickwork? I have included photographs just in case this is a special case:
18
votes
5answers
89k views

What actually happens if I vary proportions of cement and sand in mortar?

When preparing cement mortar proportions of sand and cement can AFAIK be varied. I've always been using the "default recommended" 1-to-3 (one volume of cement for every three volumes of sand) ...
6
votes
3answers
1k views

Will colouring mortar weaken it?

My neighbour has recently had some work done to her roof. The old mortar was red and the new mortar is grey (uncoloured). So it looks a little silly with both colours present. She's not very happy ...
3
votes
1answer
872 views

The mortar between my patio bricks is crumbling away

The bricks on my front porch have some sort of mortar that crumbles away more and more every time I pull a weed from it. You could pick this stuff away with an awl but it is not just sand that you ...
3
votes
2answers
621 views

Mount an LCD TV to 30 year old masonry fireplace

Power and HDMI are no issue. I'm worried about messing with the mortar. Any advice? Will this be an issue, more trouble than it's worth, etc? I have some alternatives. Leave my TV on the mantle or ...
3
votes
3answers
2k views

Is there some flexible cement-based mortar?

I live in an apartment in a multistoried building. The building is assembled of huge enforced concrete plates - one plate is size of a wall of a room. One of the inter-plate seams has a crack in it ...
4
votes
3answers
6k views

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

The mortar in our 25-year-old chimney is starting to crack and now leaks into our home if it rains hard. I assume we're probably in need of repointing, but a contractor that has done roof work for us ...
1
vote
1answer
748 views

What type of mortar would I use to seal cracks in our chimney?

We've got a brick chimney that's ~25 years old and it's got a quite a few cracks in the mortar (some hairline, some as thick is a quarter). What's the best way to seal all those cracks? I assume ...
13
votes
4answers
57k views

Must I remove all mortar between tiles before grouting?

I'm just getting ready to lay down the grout after successfully tiling our master bathroom. I've been told in no uncertain terms that I must remove the spacers between tiles (or else grouting over ...
12
votes
3answers
51k views

What kind of mortar should I use to point a fieldstone foundation?

What kind of mortar should I use to point a fieldstone foundation? The old mortar is crumbling, and sandy mortar is falling out onto the basement floor. I plan to remove the crumbling mortar (see ...
4
votes
3answers
7k views

How do I replace a bricked in mailbox?

My in-laws have a Mailbox that's a normal looking metal mailbox that's in a brick enclosure. It appears that when it was built, someone just put down mortar, set the mailbox in it, covered the ...
0
votes
4answers
4k views

How to reduce noise while drilling?

Unfortunately I can only drill in the late afternoon or during weekends, but my area is very quiet and I would really like to avoid driving my neighbours mad... So is there anything I can do to make ...
2
votes
1answer
466 views

What is the best way to uncover weeping holes?

We just bought a house where an old man lived for 27years. When he built the place, I doubt that he had any idea that the voids in the brick were weeping holes. I would like to fix them, but I'm not ...
6
votes
1answer
2k views

Should I supporting a load via anchors in brick or mortar?

I'm attempting to hang window flower boxes (a metal frame with a moss/fabric insert, filled with dirt/flowers/water for a total weight of about 15 lbs) on a brick wall. An example of a similar metal ...
4
votes
1answer
745 views

What mix of cement and sand should I use to set cap slabs?

We have a number of "slabs" that are just wider than a brick, which are set on top of walls in the garden. A number of them have come lose and I need to remove the cement mix that used to hold them ...
3
votes
1answer
913 views

Cause of eroded mortar in exterior brick

This question actually reminded me of an issue with my exterior walls. I have the same problem with the vertical mortar being eroded/missing from several bricks at ground level on the exterior of my ...
7
votes
2answers
1k views

Should I fill eroded mortar in exterior brick?

There's a few bricks around my house about 40cm up from ground level where the vertical mortar between the bricks has completely fallen out / eroded away. In a few spots, there's insects going into ...
6
votes
5answers
4k views

Do they make a non-liquid concrete/mortar color additive?

I've been trying to find a cement additive to change the color of some mortar, but only seem to be able to find it in liquid form at my local big-box hardware store. I'm looking for a similar ...