Questions tagged [cement]

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2answers
29 views

Using white cement + water to mould a part [closed]

I'm trying to cast a small robotics part for a local college. Its small in size but needs to be heavy. So far I've created one with epoxy resin and it is okay. However, for the same size, I wanted ...
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0answers
16 views

Can i use non-tiled cement board -floor & shower shower stall?

Ground up bathroom build on (composite board) deck. I want an industrial look/not using tile. Some leakage is OK as it will be going through deck onto soil but would like to avoid mold. If I can keep ...
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0answers
15 views

Light Frame Structure Ceramic Floor Installation

I hired a contractor who made a big mistake. He installed a ceramic floor onto 1"inch cement board (that is screw into welded beam constructed subfloor). He did not use thin set or tape over the ...
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3answers
377 views

How to replace loose 4x4 wood fence post with a steel post

The original 4x4 wood fence post for my home's side gate (that holds the catch part of a gate latch) is very loose and wobbles. The post is surrounded on 3 sides with my concrete walkway, and the 4th ...
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1answer
29 views

Exterior Cement Patio poured all the way to exterior brick of the house. Water proofing options?

My house was built in 1955, at some point (unknown) a cement patio was poured beside the house. The cement was poured all the way to the brick work of the house (No visible gap or nor is there a good ...
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2answers
21 views

Securing brick, rock or pavers on artificial turf

I want to build a backyard putting green. The company I am going to buy the turf from (Garden-mark) says to lay the artificial grass over prepped ground as if laying pavers and secure the turf with ...
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1answer
35 views

Is it possible to use ABS cement to glue together THREADED ABS union fitting on P-trap for permanent connection?

Is it possible to use ABS cement for threaded ABS union fitting on P-trap for permanent connection? Or it won't be secure enough even if it glued together with cement? Or need to actually replace with ...
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1answer
24 views

Generic water-based polyurethane for concrete desk?

I recently made a desk with a concrete top. It was a little rough so I smoothed the top with a liquid mix of just cement and water. I'm now preparing to finish it. I have a pot of water-based ...
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0answers
29 views

Concrete for making concrete molds

I am trying to make some concrete items such as trays, vases, bowls etc. Can anyone please advise on recipes/ratios for this? I would like to make these in white, black and grey and want a smooth ...
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2answers
83 views

Do I really need 140 lbs of cement for a 5“, 5' high vinyl fence post (31” in the ground)?

140 lbs Seems like a lot of cement, I was hoping to get by with just one 80# bag. I guess the hole would be 12" per auger rental advice. I Live in Montana, not a lot of moisture but ground freeze ...
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1answer
54 views

Will surface scuffs be a long-term issue in a new concrete walkway?

I'm probably being paranoid but would like to get some expert opinions as this is my first time dealing with concrete. I had a concrete path laid in the garden, around 80-100mm thick. It was laid and ...
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0answers
18 views

How to add small ramp or level painted concrete?

I have a small patio (10'x6') with painted (oil based) concrete. It has a slightly uneven slope resulting in standing water with heavy rain. I would like to add a small ramp/slope to the top of the ...
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1answer
33 views

p-trap installation by newbie: cement cure time

I was installing a new p-trap under the kitchen sink: Attached tailpiece to the sink no problem. Then I prepared a short piece of 1 1/2" ABS pipe, put a plumbing cement on it, inserted one end ...
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1answer
29 views

How to prepare vertical brick surface so Portland cement based mixtures (concrete, mortar) will adhere properly?

I have a sub grade vertical stack of perforated brick (foundation) which I need to coat in a thick layer of mortar or concrete in order to fill gaps, creating a flat surface for subsequent painting/...
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1answer
31 views

Blending new concrete patch fix

I'm back for another concrete-related question: I previously asked Fixing broken piece of concrete and got great answers from folks here. I went to HD this weekend and finally patched up the broken ...
2
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1answer
58 views

Best practice for filling a pit in a concrete slab?

I have in my barn (concrete floor) a pit, of about 36" x 60" x 10" deep which was originally used to install some machinery by the previous owner. I have no use for it, and would rather ...
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1answer
28 views

Best way to fix tile

One of our old tiles suddenly feel off, the others seem ok. What's the best to fix back. I don't think I'll be able to get a new tile to match, and I don't think I can chisel the old mortar off ...
2
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1answer
70 views

Can an old-cement garage floor be painted in sections?

This question is related to our other question about relocation of our hot water heater. The current plan is to put the new water heater in the garage on the cement floor, so our concern is how to ...
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1answer
46 views

Does cement smell/gas off after a few hours?

I may use cement to fill some deep holes. I read that it cures in 30 days and will gas off for 30 days. This may however mean after a few hours it will mostly be cured and then it will gas off an ...
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1answer
39 views

Can you use cement to fill a boiler flue hole?

I am having the same problem as this question: How do I fill a hole surrounding a boiler flue? I notice the answer doesn't mention cement but other products which may have been due to fire safety ...
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4answers
142 views

Pouring concrete over rocks

Need a bit of guidance here, I have tough yard and my contractors are going to pour concrete over some large boulders and filled in the remaining area with parts of other boulders (6in to 1 foot). ...
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5answers
5k views

Contractor is installing a vinyl fence and posts but is not using any water with concrete. Is he doing it right?

I hired a reputable local company to install 6 foot vinyl fence around my yard. Salesman was telling me how they would be using cement to hold the post in place. To my surprise I see the workers use ...
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3answers
90 views

Cracks on second-story cement slab

I just purchased a 50-year-old condo. I pulled up the carpet and found the second floor to be a concrete slab. There are thin cracks in areas and a small pit in one area. What are my options for ...
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1answer
67 views

How to repair cement/flowable-fill slab cracks

I have a 5o yr old condo. The second floor is a cement or flowable-fill slab. There are cracks in areas and a pit in one area. Can I repair the pit and cracks or do I need to tear it all out? [![...
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0answers
36 views

Garden wall pointing / capping advice needed

I’m hoping to get some advice on a project I’m planning. I bought a house last year that has a 2 foot retaining wall between the decking and the lawn. It’s a red brick wall and looks to be in pretty ...
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1answer
42 views

Proper deck post installation

I am having a deck installed and question how the posts are done. The deck is from 2 to 5 feet above ground on a slope. The holes were dug, probably 5 feet deep near the house then about 4 feet at ...
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0answers
23 views

How should I waterproof/seal a large hole in my basement wall?

There is a small 8"x12" plexiglass window in my basement that I want to seal/waterproof and then cover with soil. On the exterior of the house the window is at the base of a negative slope in the yard,...
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0answers
36 views

Shower curb: Fill in holes in cement blocks before tiling?

I am putting a curb in my shower using small cinder blocks. Do I need to fill the holes with cement before tiling?
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4answers
122 views

Can I create concrete driveway with forms to get the paver stone look without the need for all the aggregate beneath?

We are in desperate need of repaving our backyard that serves as a parking lot in addition to redoing our driveway. After weighing the pros and cons and taking in aesthetics we are interested in doing ...
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1answer
83 views

How much cement and sand to buy - instaling garden edging

I am planning to lay down edging around the lawn in my garden - leaving about 750 mm wide flower beds along the fence. All in all, I need to lay down about 23 meters of edging slabs - it will be ...
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1answer
66 views

Is it safe to pour concrete and use mortar in freezing weather?

I have a 1947 cape (Cape Cod style home) in New England. The basement egress walls which are made of unfilled cinder blocks and run parallel to the house under the porch are caving in. I thus have ...
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1answer
91 views

Why do you need to not use cement when laying block paving?

When you lay block paving surely you have to lay it with cement rather than just sand as it hold the block down securely. So why is this?
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1answer
923 views

Is it OK if my Durock cement board got wet?

I bought some cement board for the bathroom remodel and I stored it in the garage. No idea how but each sheet got a couple wet spots through them. I moved them inside to dry. After they dry are they ...
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0answers
25 views

How do I know what the cement or stucco finish on my house is?

Just purchased a house (first time homeowner) and I'm realizing there is of course a lot I don't know about it. I'm trying to hang a mailbox on what I think is a stucco wall, but apparently there are ...
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4answers
796 views

Mounting pull up bar on cinder block wall

So, I've read through a bunch of stuff online for mounting a pull up bar to a cinder block wall and before I go out and rent a hammer drill I want to see what would be the best anchor system for my ...
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1answer
181 views

Please help - wonky post location on pergola - concerned with shearing and stability

So ever since my wife pushed me to move the post off square I've been searching online (periodically for about a month and I've never found someone dumb enough to have done this and had a tutorial or ...
2
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2answers
284 views

Filling hollow blocks one level at a time

I live in an area where basic building materials are available but expensive - there are not many places to rent tools and things are done slowly by hand. It is also an earthquake zone. I am thinking ...
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2answers
145 views

How to seal crevices in dry stack rock wall to prevent gopher activity?

I've recently had a retainer wall built in the landscape using the dry-stack method (see photos). Unfortunately, there has already been two occasions within past month of gopher activity behind the ...
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1answer
51 views

What to do with concrete/cement runoff from cleaning tools?

I'm completely new to working with cement/concrete. I can follow various guides online (I'm only looking at really simple loose-brick fixing for now). However, no guide makes clear how I should ...
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3answers
125 views

Can you “refresh” half-dried concrete just by mixing in water?

I mixed a wheelbarrow load of concrete (sand, cement, water) this morning, but before I could use most of it, I got called away and didn't get back until this evening, like 7-8 hours later. By now the ...
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2answers
81 views

Using just cement to plug a narrow channel/hole

I know that ideal thing is to use concrete, a mix of cement and aggregate (usually sand and gravel/rocks. However I have a bag of cement that's not going to go to any use, and my aim is just to cover ...
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1answer
38 views

epoxy grout in contact with regular sanded cement grout

We don't have a floor threshold between the bathroom floor and the corridor. is it a bad idea to grout the bathroom floor with epoxy grout and the rest regular grout? what happens if the epoxy grout ...
0
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1answer
69 views

Materials for building inexpensive light-weight large planter?

I've wanted to build a few large planters for a while now, and I've considered using concrete, wood, etc. I don't know what other cheap material to use. Initially, I wanted to make them out of pre-...
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2answers
203 views

Material lighter than concrete for planters?

I'm trying to build several 24"x 24" square planters with each wall 1.5" thick, similar to the following picture. The issue is that each one of these planters will weigh at least 200 pounds (without ...
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1answer
39 views

Do these plastic molds exist?

I want to make a few concrete pavers, so I started looking for a few tutorials, and found this youtube video. In the tutorial, he uses a plastic mold where he pours the concrete. Something like this: ...
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2answers
154 views

Lard as release agent?

So I’m learning how to make concrete pavers with this youtube video. He mentions that he uses lard as a release agent, so he brushes that into the mold. He also suggests cooking oil or motor oil for ...
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2answers
51 views

Thinnest screed over the water heating floor

I installed a water heating floor system with 17 mm pipes and studded panels. This is how a studded panel with a pipe looks like: It has 52 mm height (the polystyrene has 30 mm). Now I want to add ...
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3answers
1k views

Method for setting 6' wood fence posts in clay soil

Background Currently in the process if planning/designing a privacy fence after recently removing the old posts from the ground. I'm now at a point that you might call analysis paralysis involving ...
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1answer
80 views

Installing tile on screened porch

We have screened porch that currently has outdoor carpet on the floor. We want to get rid of the carpet and maybe tile the porch. There is standard decking under the carpet. I have been told by both ...
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2answers
507 views

Is there any way to remove hydraulic cement from a concrete slab without ruining the concrete?

So the previous owners of my house put hydraulic cement along the edges of the wall in the garage and it looks pretty ugly. Is there any way to remove it? I've seen these Portland Cement dissolving ...