 |
|
| Browse | Ask | Answer | Search | Join/Login |
|
|
||||
|
New Concrete Patio spots
We had a patio poured on Friday when the weather was rainy in the AM and humid the rest of the day. The contractor put sealer on it when they were finished and now the patio looks spotted and some of the edges look dirty. Anyone know why? It looks horrible. We were gone all weekend and came back pretty unhappy.
|
||||
|
||||
|
It's not uncommon for new concrete to have uneven color or appear to have stained areas. In most cases, the cause is due to the lime (part of the concrete mix) leaching out of the slab as it dries or areas of the concrete that are curing/drying at different rates. If you wash the new slab off with a hose for a few days... you'll probably notice a significant improvement in the way it looks. After a month or two... your concern will just be a "fond" memory.
Good luck. |
||||
|
||||
|
The sealer put on the concrete may have created areas where as Kstar mentioned the lime leaching out. Concrete sealer, seals the concrete from Hydration if put on to early. Hydration is the process in which concrete dries. Concrete with out sealer can stain or discolor. After the hydration process has had ample time usually 4-7 days depending on the weather then the sealer can be applied. The best method for curing concrete is to allow the hydration to take place using no sealer and keeping the surface of the concrete moist, usually by placing water on the surface over a period of 7 days. It is not the surface of the concrete that needs to hydrate it is the very most middle part of the slab that needs to hydrate. If this hydration is limited in anyway you will have concentrated areas where the path of least resistance is utilized thus spotted and dirty.
|
||||
|
||||
|
I had a patio put in last summer and it became darkened and spotted. As time went on it got worse. The company claimed it was a reaction with the sealer. They removed the sealer, cement became clean and we waited all winter. This spring they put a different kind of sealer on and we now the darkened spots are back. Is it possible that it is coming from the cement and the contractor needs to rip it up and start over?
|
||||
| Question Tools | Search this Question |
Add your answer here.
Check out some similar questions!
I would like to build a concrete paver patio in my yard. The problem is the septic tank cover will be in the middle of the patio. It will be raised about 1 inch above the patio pavers. I would like to build the patio over it but construct something that would allow easy access to the cover. ...
I am purchasing a new home. There is a small outside patio that does not have enough slope to drain rain water off. What would be a easy solution to this problem without having to complete redo the patio. Is there a concrete topping that can be applied to the existing slab to create a slope? ...
We recently had a concrete patio laid down. The patio abuts the back of the house but no expansion joint was installed against foundation of the house. The contractor said these were not needed since expansion joints were installed in several ares of the patio. Is expansion joint necessary...
Hello All, I just found this forum and I see some good answers to good questions. I am hoping someone can help me with my problem. I am looking to build a concrete patio and walkways. I have built my house using slab on grade with radiant heat. We compacted gravel, used vapor barrier, ...
Hello... my question: I'm having a new concrete patio laid, it's about 15X30'... does it need re-bar... AND gravel? They have the re-bar down, but not gravel.. just dirt? Brad
View more questions Search
|
