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What you need to do first is to check if you have that room near the threshold of the door for that extra concrete(which is minimum of 3.5" inches) then you need to remove the top surface of the old concrete to be rough surface don't break too much just about an 1"wash clean and let it dry and only then to install the new concrete.

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Q: How do you pour concrete on old concrete?
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Related questions

Can you pour concrete on old concrete?

not normally. it depends on what you are trying to accomplish. if you need a thin layer than you can pour a thin set layer which hardens and adheres better than concrete. if the added part is thicker you can drill holes in the old and put re bar in then pour on top to help tie the two together.


How much does it cost to pour a concrete driveway?

how much does it cost to form and pour concrete in Mobile, AL


How much to pour a concrete slab 12x24?

about how much to pour a concrete slaba 12 x 14'


How do you cover brick with concrete?

POUR THE CONCRETE OVER THE BRICK


How to prepare the ground to pour a concrete curb?

There are a number of ways in which you could prepare the ground to pour a concrete curb. You could level the surface and pour sand.


How do you build a floor on sloping concrete?

it can be done == you can pour self leveling cement mixture over old concrete but you must first rough up surface of old concrete then put bonding agent then mix self leveling mix very wet so you can pour from high spot and it will run to lower areas . Use wood furring strips ripped at an angle to compensate for the angle in the sloped concrete.


Can you get a handprint off concrete?

pour more concrete over the top and smooth it out


How do you produce concrete blocks?

You pour liquid concrete into a frame and let it set.


Can you pour a concrete slab onto another concrete slab?

No. Concrete won't bond to concrete. It will end up cracking.


Do you need a license to pour concrete?

Yes


Can you pour concrete over asphalt?

Yes, but you will need to reinforce with a wire mesh and then pour.


Can we have an alternative method or system to concrete pour cards?

pour card poor or fare