How to Repair Non-Structural Damage in a Concrete Ceiling
- Clean the ceiling thoroughly with soap and water, then apply a cleaning solvent to remove grease and oils from the repair surface.
- Work around the lip of the crack or hole with hammer and chisel, undercutting the edge of the crack and widening it behind the surface edges, creating a ...
- Mix epoxy-based concrete repair compound according to manufacturer's instructions. Use the type that bonds more slowly.
- Smooth the top of the repair compound with the putty knife, pressing the material well into the crack.
- Cover the repair compound while it cures. Lay strips of cardboard over the repair and tape it into place with duct tape.
- Sand over the top of the repair to blend it into the ceiling. ...
How to deal with concrete ceilings?
- Use boots, as not to get your cloths and skin dirty with concrete
- Clean thoroughly your tools after you have finished the project
- Wear protective glasses and gloves, to avoid possible injuries
- Make sure the ceiling formwork is perfectly level
How to fix a leaking concrete ceiling?
Part 1 of 3: Draining the Leak
- Look for identifiable signs of moisture. To fix the leak, you'll have to locate the area of your ceiling that is leaking water.
- Lay down drop cloths or tarps under the leak. Putting down drop cloths or a plastic tarp underneath the bucket will prevent your floors and furniture from getting wet.
- Put a bucket under the leak. ...
How to patch cement ceiling?
- Patch all cracks and holes in the old concrete.
- Mask each expansion joint with a strip of duct tape.
- Mix the concrete dressing.
- Pour the dressing onto the concrete.
- Give texture to the surface.
- Remove the duct tape.
How to repair concrete ceiling tarnish.?
- Remove the spalled concrete with much care to expose the corroded steel bar.
- Clean the corroded steel bar, removing all the rust. Then, apply two coats of anti-rust paint on it.
- Apply a bonding agent to the affected surface for adhesion. ...
- Paint the repaired area, matching the rest of the surface.
How do you fix peeling concrete ceiling?
2:023:33Dealing with Spalling Concrete - YouTubeYouTubeStart of suggested clipEnd of suggested clipApply two coats of anti rust paint to the steel bars patch. Apply a bonding agent to the exposedMoreApply two coats of anti rust paint to the steel bars patch. Apply a bonding agent to the exposed steel bars and concrete surface before patching to ensure proper adhesion patch.
Can ceilings be made of concrete?
Concrete ceilings are becoming increasingly popular in multi-story construction, apartment blocks, repurposed warehouses, factories, and residential houses. They bring unique robustness and thermal mass to spaces that lean more towards industrial or contemporary aesthetics.
How do you fix overhead concrete spalling?
3:1719:12RAP 6—Vertical and Overhead Spall Repair by Hand ApplicationYouTubeStart of suggested clipEnd of suggested clipSo what we're talking about is using hand application with with trowels. It's a manual process theMoreSo what we're talking about is using hand application with with trowels. It's a manual process the materials are made specifically for this type of repairs.
How do you prepare a concrete ceiling?
Rinse your ceiling thoroughly with warm water and let it dry for at least two days before applying paint. Always wear gloves when handling harsh chemicals like TSP. Once dry, run over your ceiling with 150-grit sandpaper to rough up the surface and help the paint to adhere.
What is a concrete ceiling called?
It's called a “Smart Slab:” A mixture of concrete, rebar, and carbon fiber that form a super-light, super-strong slab ceiling.
How do you dress a concrete ceiling?
5 Creative Ways to Dress Up a CeilingExposed Concrete. In my own design projects, I find many clients are excited to remove a popcorn ceiling treatment, and this is usually my preference as well. ... Flat Drywall. ... Paint. ... White. ... Gray. ... Accent colors. ... Matching ceilings and walls. ... Two-tone paint.More items...•
Why is top layer of concrete flaking off?
Damage will show up when the concrete is exposed to ice or snow which then melts and penetrates into the concrete and freezes. Frozen water expands about 10%, pushing the thin, weak top layer upwards causing the layer to peel off (known as spalling).
What does spalling look like?
Spalling concrete can look like round or oval depressions along surfaces or joints. Spalling tends to be most common in cold climates when de-icing chemicals are applied or when seasonal freeze-thaw cycles damage the concrete.
What does spalling concrete mean?
A spall is defined as flakes of material that are broken off of a larger solid body. Concrete spalling typically begins when the steel reinforcing embedded within the concrete member rusts. Contrary to popular belief, concrete is porous.
How do you fix a big hole in a concrete ceiling?
You will need an epoxy-based concrete repair compound, particularly one that bonds more slowly. After injecting the compound into the crack, smooth the surface with a putty knife. Do not be shy about adding more compound to the crack, as you need to be sure that the crack is being filled. Cover the repair as it cures.
Can you skim coat over concrete ceiling?
0:263:17I Skim Coated A Concrete Ceiling Today! - YouTubeYouTubeStart of suggested clipEnd of suggested clipAlso in hotels. That are two floors or more are usually concrete ceilings as well but anywaysMoreAlso in hotels. That are two floors or more are usually concrete ceilings as well but anyways there's expansion joints across these ceilings. And they're finished just like drywall. Is you tape it and
Do I need to prime a concrete ceiling before painting?
Generally speaking, priming is so essential to successful painting outcomes, concrete will always needs a primer. However, the existing surface needs to be primed before painting if: It is unpainted. It is peeling.
How far can a concrete ceiling span?
Reinforced concrete allows a wide range of structural options and provides cost-effective solutions for a multitude of situations—from residential buildings with moderate live loads and spans of about 25 ft, to commercial buildings with heavier live loads and spans ranging from 40 ft to 50 ft and beyond.
What is a slab ceiling?
In high rise buildings and skyscrapers, thinner, pre-cast concrete slabs are slung between the steel frames to form the floors and ceilings on each level. Cast in-situ slabs are used in high rise buildings and large shopping complexes as well as houses.
Can you use cement board on a ceiling?
The advantages of using cement fiber boards do not end here. Their exciting and elegant styles and easy-to-use property also make them a great choice for ceilings. You can also install down lights and paint the boards as per your choice.
How do you anchor a concrete ceiling?
Simply drill a hole into the concrete, hold the fixture you're fastening over the hole, then use a hammer to tap the anchor into the hole. As you drive in the pin, the sleeve expands outward, trapping the anchor in the hole.
How to repair a crack in the ceiling?
Work around the lip of the crack or hole with hammer and chisel, undercutting the edge of the crack and widening it behind the surface edges, creating a flat-topped inverted "V" like a dovetail joint in a dresser drawer corner. On a ceiling, the wider part will actually be above the surface of the crack, so the "V" will, in fact, be right side up in relation to gravity. Remember, you are working upside down on a ceiling. Don't cut the crack in a "V" shape with the narrow end away from the surface. The expanding repair compound will actually push itself up out of the crack. The dovetail shape will cause the repair material to push itself more securely into the crack.
How to make a ceiling repair flat?
Use the putty knife to make the repair as flat as possible while the repair compound is still malleable. Remember the repair compound expands rather than shrinks. Be sure to set up fans or wear a respirator when painting the ceiling or working with solvents. Keep the area well-ventilated.
Why is my concrete ceiling cracking?
The foundation may shift as the ground beneath moves. Soil-settling can shift the walls and crack concrete ceilings. You can't fix it with ordinary cement because cement shrinks when it dries. New materials have been developed that are very strong, durable and expand when they dry. With a little prep work, you can create a lasting, permanent repair.
How to fix a broken drywall wall?
Cover the repair compound while it cures. Lay strips of cardboard over the repair and tape it into place with duct tape. You can even duct-tape directly over the compound. Once it's set, the tape will peel right off. Allow to set and cure.
What is the V on a ceiling?
On a ceiling, the wider part will actually be above the surface of the crack, so the "V" will, in fact, be right side up in relation to gravity. Remember, you are working upside down on a ceiling. Don't cut the crack in a "V" shape with the narrow end away from the surface.
How to get invisible repair?
Paint or seal. To get an invisible repair, you'll probably have to redo the whole ceiling at least in the section where you've made the repair. Tom King published his first paid story in 1976. His book, "Going for the Green: An Insider's Guide to Raising Money With Charity Golf," was published in 2008.
What are the ramifications of applying multiple layers of mortar?
The ramifications of applying multiple, thin layers of mortar are clearly visible in some of the pix, appearing as relatively smooth interfaces with little interlocking of aggregate particles. The sporadic air voids and cleavage planes are indicative of gravity working on the mortar while still fluid.
Can you use Portland cement for patching?
When "pure" concrete containing no additives is used for patch material, then yes, a bonding agent is usually used. Our DOT preference was a neat Portland cement slurry, with the consistency of thick cream, vigorously broomed onto the damp surfaces immediately before the repair concrete was placed.
Can a mortar band aid stick?
A mortar "Band-Aid" repair can stick and perform only if it isn't subject to internal/external stresses that exceed its cohesive and adhesive attributes (the ability to stick to itself and the parent surface). The OP's situation clearly has such stresses, as indicated by the number of failures he's experienced. The ramifications of applying multiple, thin layers of mortar are clearly visible in some of the pix, appearing as relatively smooth interfaces with little interlocking of aggregate particles. The sporadic air voids and cleavage planes are indicative of gravity working on the mortar while still fluid.#N#As mentioned previously, any overhead repair has a better chance of adhering if sufficient removal of material surrounding existing rebar is done. I always told my inspectors to use the "grab method," meaning they should be able to put their entire hand/fingers around the perimeter of any exposed rebar, that either has more than half its diameter exposed or is clearly debonded from the parent concrete ("bounces" when struck with a hammer).
Concrete Crack Repair
The technique for patching cracks will depend on the size of the crack.
Remove Paint From Concrete
Concrete is porous and absorbs paint well. Here are some recommendations for removing spilled paint.
