I have a concrete porch with an old, ugly, scratched up painted surface.
I would like to resurface with new concrete and then acid stain.
Will new concrete stick well to the painted concrete? Would I need a bonding adhesive first? Or perhaps some concrete resurfacer?
I prefer a new purer concrete surface for the acid stain. The old surface is just discolored/painted and would be a ton of work to make it look new.
Thank you.Ok to apply new concrete surface on top of old painted concrete surface?
New concrete won't bond to old concrete no matter what you do, that's why starter rods would be helpful (sort of like the concrete nails idea) You could just drill some holes in the concrete and glue bolts (like liquid nails or max bond) into the holes leaving the bolts sticking out like starter rods, depending on how thick your intended slab would be is how far they would be protruding out, make sure to leave any rod to sit at least 1 1/2'; below the surface of the new concrete.
If you intend you lay a slab thick enough for starters, if not just tile over the old concrete, scrap of most of the paint off as you can and use a rubber type setting compound.
%26gt;%26gt;%26gt;If bonding concrete really worked, why do people use expansion joint, you'd think they would just bond the concrete together and be done with it, BTW which you'll need to place around the boundries of the slab that's against any masonry%26lt;%26lt;Ok to apply new concrete surface on top of old painted concrete surface?
There are 2 types of concrete overlays, bonded and un-bonded.
A bonded overlay is when you apply a bonding agent to the existing slab and pour on top of that. This allows the two slabs to move in unison, and makes the topping slab more resistant to impact damage and spalling.
An un-bonded overlay is when a bond breaking agent (or layer of thin plastic) is applied in the same way. The benefits of this technique are that cracks in the bottom slab don't transmit directly into the new slab and it can move independently (like a ';floating'; floor system).
Whichever method is used, it must be consistent. Any part that bonds or fails to bond will cause the slab to crack or break.
I recommend that either be performed by a licensed contractor with overlay experience. This could be fairly easy to mess up without experience.
It might take more time to clean your existing slab to an acceptable level, but you are much more likely to have better results in the long run. And just imagine the cost of clean up and redoing it all over again.
the problem is, new concrete will not adhere to old concrete and eventually it will start to crack and fall apart and then it will look worse than before. how long this will take i dont know maybe only one season. the problem is the new concrete will not expand and contract in unison with the old concrete,again, causing it to crack. the only sure fire way to do this is to replace the entire porch with a new slab of concrete.
Hi,
You need to remove the old coatings %26amp; to help you should use a liquid bonding agent that gets applied to the old concrete. You didn't mention the thickness of the new application but 2 separate pours are never as strong as 1.
Not over smooth concrete.
The old should be Roughed up.
I would even consider driving a lot of concrete nails partially into the old, so that the new will stick.
A supplier may have a better way.
Don't just pour over the old.
It will flake off.
You need to call the concrete supplier and see if they have concrete with the correct plasticizers in it. The old surface should be roughed up with floor grinder. Don't go too thin as it will just crack.
The best thing to do is get the old concrete striped and ground smooth again. Your other option is to break up the old slab. You can't pore new concrete over old.
Saturday, February 27, 2010
I have a concrete bird bath and it needs repainting, what particular paint is recommended?
I painted my bird bath with Patio Paints from Michael's Craft stores. You can use it on concrete, it is safe for the birdies, comes in almost any color you want and it is pretty cheap. I highly recommend using the sealer that they also sell because of the water application. I painted my five years ago and it is still looking good.I have a concrete bird bath and it needs repainting, what particular paint is recommended?
Be sure to use an outdoor paint that is SAFE for birds.
Ask your paint person.I have a concrete bird bath and it needs repainting, what particular paint is recommended?
concrete bird bath paint......buy it at any hardware store.....it is a specialized formula to keep th ebirds from ingesting the paint and getting high and flying upside down and stuff....;)
I CAN ANSWER THIS ONE..IM A UNION PAINTER...';HC INFUSHION'; CONCRETE STAIN..THERE ARE COLORS U CAN CHOOSE FROM.
NOT SURE IF IT COMES IN QUARTS.
A GALLON COST ME $18. DOLLARS...BUT I BUY HUNDREDS OF GALLONS.
SHERWIN WILLIAM PRODUCT
Be sure to use an outdoor paint that is SAFE for birds.
Ask your paint person.I have a concrete bird bath and it needs repainting, what particular paint is recommended?
concrete bird bath paint......buy it at any hardware store.....it is a specialized formula to keep th ebirds from ingesting the paint and getting high and flying upside down and stuff....;)
I CAN ANSWER THIS ONE..IM A UNION PAINTER...';HC INFUSHION'; CONCRETE STAIN..THERE ARE COLORS U CAN CHOOSE FROM.
NOT SURE IF IT COMES IN QUARTS.
A GALLON COST ME $18. DOLLARS...BUT I BUY HUNDREDS OF GALLONS.
SHERWIN WILLIAM PRODUCT
Hello, how do i effectively clean up emulsion paint spilt on a concrete floor.?
i agree with the paint thinner.
but the acid is also good but only recommend u using it if u know what your doing. hydrochloric acid is very strong and should be diluted.
acid may also discolor the concrete.
could also use a pressure washer (1500 psi)Hello, how do i effectively clean up emulsion paint spilt on a concrete floor.?
Try paint thinner or maybe some form of acid that will eat at the paint. Paint is very hard to get out of anything... so it's going to take something to eat at it to get it to go away.cash loan
but the acid is also good but only recommend u using it if u know what your doing. hydrochloric acid is very strong and should be diluted.
acid may also discolor the concrete.
could also use a pressure washer (1500 psi)Hello, how do i effectively clean up emulsion paint spilt on a concrete floor.?
Try paint thinner or maybe some form of acid that will eat at the paint. Paint is very hard to get out of anything... so it's going to take something to eat at it to get it to go away.
Why is concrete setting different to paint drying?
takes longer cos of consistanceyWhy is concrete setting different to paint drying?
jonahg3 - is correct. Concrete setting involves hydration, a chemical change. Paint just looses it's bonding solution (usually alcohol or water based) to the atmosphere.
The main reason why paint smells so much.....:)Why is concrete setting different to paint drying?
Concrete setting involves a chemical reaction. Paint drying does not. When paint dries, the solvent that was dissolving or carrying the pigments evaporates.
When concrete sets, the lime reacts with the sand the the other ingredients to form a complex lattice of calcium silicate crystals.
two totally different chemical reactions.
www.howstuffworks.com
Concrete is different than paint when it cures due to the fact that there is a chemical bond at the molecular level that releases heat as part of the curing process. The curing process can take a long period of time with concrete.
Paint releases alcohol, or alcohol type chemicals that dis purse into the surrounding air and dry the paint in a very short period of time.
concrete setting is a chemical reaction between the water and the cement which is called hydration which gives off heat which gives concrete that warm to touch feel just before it hardens.
paint drying is not a chemical reation and does not require water to be added to assist setting or drying
Concrete dries by heating up, most paints dry by some form of evaporation.
jonahg3 - is correct. Concrete setting involves hydration, a chemical change. Paint just looses it's bonding solution (usually alcohol or water based) to the atmosphere.
The main reason why paint smells so much.....:)Why is concrete setting different to paint drying?
Concrete setting involves a chemical reaction. Paint drying does not. When paint dries, the solvent that was dissolving or carrying the pigments evaporates.
When concrete sets, the lime reacts with the sand the the other ingredients to form a complex lattice of calcium silicate crystals.
two totally different chemical reactions.
www.howstuffworks.com
Concrete is different than paint when it cures due to the fact that there is a chemical bond at the molecular level that releases heat as part of the curing process. The curing process can take a long period of time with concrete.
Paint releases alcohol, or alcohol type chemicals that dis purse into the surrounding air and dry the paint in a very short period of time.
concrete setting is a chemical reaction between the water and the cement which is called hydration which gives off heat which gives concrete that warm to touch feel just before it hardens.
paint drying is not a chemical reation and does not require water to be added to assist setting or drying
Concrete dries by heating up, most paints dry by some form of evaporation.
CONCRETE ? , I want to either paint or stain a 3' x 12' slab.?
How do I prep it? Which works best? It is part of a covered patio, so there won't be too much direct exposure to the elements. Any help or advice appreciated. Thanks!CONCRETE ? , I want to either paint or stain a 3' x 12' slab.?
I vote for staining it. First of all, the look is much nicer----concrete staining is very popular for a reason, and there are lots of great colors. Secondly, the stain will never flake like concrete paint does. With paint, once moisture gets under it, all the work is for naught. To stain concrete, first clean it with a pressure washer. Then you have to etch it if the concrete is really smooth or really old. Then you apply the stain with a garden sprayer. It's a very easy DIY job that requires little maintenance other than sealing it every year or two, which you should be doing with concrete anyhow..CONCRETE ? , I want to either paint or stain a 3' x 12' slab.?
obviously you need to clean it first.. but how you clean it is important.. if there are stains or some mold or moss, something of that nature.. you want to get yourself a bottle of muriatic acid.. lowes and walmart or home depot should have it.. mix it with water and scrub the concrete first.. it will eliminate all the things I mentioned and more.. follow the directions.. that stuff is hot.. so don't make ti so strong that it will etch the concrete.. the directions are on the bottle.. clean it then coat it with masonry primer.. and then paint it with a good masonry paint.. sherwin williams makes the best.. good luck
clean it , with a hose , even a power hose ,
leave it over night , then brush it clean , is the slab is really rought , paint a concrete primer on it , if not ,go to walmart / sher williams one gallon will work, with a roller . paint in the early evening ,much cooler , and less people to stand on it
I vote for staining it. First of all, the look is much nicer----concrete staining is very popular for a reason, and there are lots of great colors. Secondly, the stain will never flake like concrete paint does. With paint, once moisture gets under it, all the work is for naught. To stain concrete, first clean it with a pressure washer. Then you have to etch it if the concrete is really smooth or really old. Then you apply the stain with a garden sprayer. It's a very easy DIY job that requires little maintenance other than sealing it every year or two, which you should be doing with concrete anyhow..CONCRETE ? , I want to either paint or stain a 3' x 12' slab.?
obviously you need to clean it first.. but how you clean it is important.. if there are stains or some mold or moss, something of that nature.. you want to get yourself a bottle of muriatic acid.. lowes and walmart or home depot should have it.. mix it with water and scrub the concrete first.. it will eliminate all the things I mentioned and more.. follow the directions.. that stuff is hot.. so don't make ti so strong that it will etch the concrete.. the directions are on the bottle.. clean it then coat it with masonry primer.. and then paint it with a good masonry paint.. sherwin williams makes the best.. good luck
clean it , with a hose , even a power hose ,
leave it over night , then brush it clean , is the slab is really rought , paint a concrete primer on it , if not ,go to walmart / sher williams one gallon will work, with a roller . paint in the early evening ,much cooler , and less people to stand on it
What is best way of painting concrete floor (garage) without etching with acid prior to painting?
should one use a primer?What is best way of painting concrete floor (garage) without etching with acid prior to painting?
using a latex paint works i believeWhat is best way of painting concrete floor (garage) without etching with acid prior to painting?
first step clean the surface as well as u can with hose and soap or floor cleaner, let dry for couple of days depending on weather, apply prime let dry, then apply floor paint to surface. They actually make paint made for flooring. If that's to expensive i have tried some enamel paint and it has held up very well.
You need a good epoxy paint to resist wear and hot-tire pickup.
Here you go:
http://www.hcconcrete.com/product/shield鈥?/a>
using a latex paint works i believeWhat is best way of painting concrete floor (garage) without etching with acid prior to painting?
first step clean the surface as well as u can with hose and soap or floor cleaner, let dry for couple of days depending on weather, apply prime let dry, then apply floor paint to surface. They actually make paint made for flooring. If that's to expensive i have tried some enamel paint and it has held up very well.
You need a good epoxy paint to resist wear and hot-tire pickup.
Here you go:
http://www.hcconcrete.com/product/shield鈥?/a>
Can I spray paint concrete?
I have gloss spray paint, And i'd like to spray paint the walls in my studio, but they're concrete. How will it come out if I spray paint them black?Can I spray paint concrete?
it will work ok.
it will work ok.
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