Home>Discussions>EXTERIORS>Concrete patio resurfacing?
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mabwyncote
Concrete patio resurfacing?

I have a rental property in Wildwood ( Doo Wop Capital) New Jersey. It has an outside front porch appros. 7 ft x13 ft with bricks around the perimeter. It is elevated, with a crawl space underneath it. I ripped up the old outdoor carpeting and most of the old flagstone and mortar came up with it. It seems as though the mortar that held down the flagstone had deteriorated. What is left now if a 3"-4"solid concrete base.with bricks securely attached around the perimeter. The patio is against the house (brick). The depth of this area is between 1" to 1 3/4" I have asked numerous contractors what is the best way to fix this and I get different answers with prices ranging form $450 to $2,500.Recommendations included tile, fiberglass, stamped concrete and concrete.The concrete contractors say they need to chisel or jackhammer the concrete foundation to 3"-4", but my worry is that it may crack the foundation or house bricks. I was hoping to concrete and acid stain it. Thoughts??

ed21
Re: Concrete patio resurfacing?

Since it's a rental property, why don't you just reinstall the flagstone that came up. For the cost of the mortar and a few tools and labor your landlord still has what he rented you minus a wornout carpet.

KKelly
Re: Concrete patio resurfacing?

Maybe I'm missing something here but, from your description, you have a concrete slab patio, 3"-4" thick, elevated above the ground with a crawl space underneath. And the depth of some unknown area is 1" to 1 3/4" thick.

What is holding up this heavy slab to make a crawl space?

If it’s just a slab (on the ground) covered with a stone veneer, almost any old style, lime based, thin-mortared surface will deteriorate if covered with indoor/outdoor carpet (which holds water to the surface and, essentially, dissolves the mortar over time).

I’m guessing that you have a slab on grade with a stone veneer over it. If the slab is deteriorating then the only reliable choice is to remove it and replace it. Anything else will crack over a very short period of time and fall apart.

mabwyncote
Re: Concrete patio resurfacing?

Sorry , let me more clear

I am the owner of the rental property in question.

The concrete slab in not deteriorating,rather the flagstone/mortar that was on top on the concrete foundation has. The concrete is in perfect condtion. The flag stone on top can not be reused since it has crumbled into pieces. The concrete is not on the ground but was elevated with wood planks, thus creating a small crawlspace underneath.

I was wondering if there is some type of concrete that will adhere to concrete with only a depth of 1 to 2 inches.

I was considering using outdoor tiles but could not locate them with 1/2" to 3/4" thickness. Not sure if tiles set in mortar would last for long.

thanks

ed21
Re: Concrete patio resurfacing?

Their are brick and concrete pavers at 1 1/2" thick. maybe they could be set on a sand bed to make up the difference.
I'm a bit confused with what you have.
Yes, a layer of concrete 2" should be able to be placed over the existing slab. A stamped or scored surface would contain cracking and be decorative too. Hopefully everything has a bit of pitch so the water drains away.

Blue RidgeParkway
Re: Concrete patio resurfacing?
mabwyncote wrote:

Sorry , let me more clear

I am the owner of the rental property in question.

The concrete slab in not deteriorating,rather the flagstone/mortar that was on top on the concrete foundation has. The concrete is in perfect condtion. The flag stone on top can not be reused since it has crumbled into pieces. The concrete is not on the ground but was elevated with wood planks, thus creating a small crawlspace underneath.

I was wondering if there is some type of concrete that will adhere to concrete with only a depth of 1 to 2 inches.

I was considering using outdoor tiles but could not locate them with 1/2" to 3/4" thickness. Not sure if tiles set in mortar would last for long.

thanks

Yes, the answer is yes.

Clean and possibly etch the concrete, neutralize. Bonding agent. Next a parge layer is troweled on usually containing a special binder also. This can then be stamped or manually shaped to mimic any style masonry/stone surface you'd like. Coloring agents can be added or applied. The parge material can be given a surface which will make it less slippery when wet. If you have this professionally done it should last just as long as the slab and withstand seasonal changes. You indicate you are well within a 2" depth so should be no problem having it done in one visit after surface preperation has completed and dried, and ready for seasonal renter activity shortly thereafter.

However before investing in a resurfacing I'd consider having the integrity of the suspended slab itself confirmed, especially since you've had it veneered AND covered with outdoor carpet. I'd be concerned about the integrity of both the "concrete" AND the rebar/reinforcement steel, especially marine locale. Perhaps a visual inspection and a core sample, maybe something else. Liability issues and unknown "loading" of the area you'd want to protect your guests and assure it is safe (suspicious about the "wood" support structure for the suspended slab as well).

makapgardens
Re: Concrete patio resurfacing?

I have the same thing on the front of my house but it is not held up with wood, just raised cement with I guess a foundation. The surface has eroded and shows the stones. I want to put a different surface on top and extend the steps to the front door which is now only a 14 inch's deep.( one step only) The size of the patio is 10 x 20. What kind of a contractor do you call to do this work?

jackwilsontexas
Re: Concrete patio resurfacing?

thanks mabwyncote,
To sharing this topics because i want also ask this kind of question. my problem is 90% similar to your post.
i find my way through the conversation due to this thread.

calcats
Re: Concrete patio resurfacing?
makapgardens wrote:

I have the same thing on the front of my house but it is not held up with wood, just raised cement with I guess a foundation. The surface has eroded and shows the stones. I want to put a different surface on top and extend the steps to the front door which is now only a 14 inch's deep.( one step only) The size of the patio is 10 x 20. What kind of a contractor do you call to do this work?

You need to contact a good cement contractor or torazzo contractor. If the finish is not to the point where walking on it is a tripping hazard, you may want to leave well enough alone. People pay extra to have concrete poured with the stone exposed. It is called "Exposed Aggregate Finish". The contractor pours the concrete, adds extra stone both in the mix and by hand and floats it all together. A retardent is sprayed on the concrete so the "cream" on the top of the concrete doesn't set up. The next morning the "cream" is hosed off and scrubbed with a stiff bristle brush, this leaves approximately 25% of the stone exposed, thus "exposed aggregate finish". You might already have this finish, if you do and it's not a tripping hazard you might want to keep it. Get an independent inspector to make the call for you, not a contractor. Good Luck!!
Calcats ;)

makapgardens
Re: Concrete patio resurfacing?

I understnad what you are saying. But my patio is very old and the stones do not show all over. It is only in the area where people walk all the time.

makapgardens
Re: Concrete patio resurfacing?

I understnad what you are saying but my patio is very old and the stones only show where people have walked over the years.

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