Extensions · Columbus Concrete Patio
Concrete Patio Extensions in Columbus, OH
More room on the patio you already have, joined so both slabs stay level. Get a free patio quote.
Serving Columbus, Dublin, Westerville, Grove City, Gahanna and 27 more towns
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Share a rough size, the finish you like and your town. The contractor phones you to go over it and arrange a visit.
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Patio Extensions
Concrete Patio Extension for Columbus, OH
Lots of Columbus-area houses came with a small builder's slab off the slider, and the most common question about it is whether it can simply get bigger. Usually it can, as long as the existing slab is level, sound and shedding water away from the house. The addition is formed against the old one, steel dowels are drilled into the old edge so the two stay flush, and the new concrete carries on with the same slope. A joint at the seam lets each piece move a little without breaking the other.
Matching is the honest part of the conversation. Fresh concrete will not be the exact gray of a slab that has weathered for fifteen years, and a new broom finish looks crisper beside an old one. Some people lean into the difference with a stamped or colored band; others let time close the gap. And if the old slab is cracked through, tipped toward the house or heaved, extending it only spreads the problem. In that case replacing the whole patio is the better use of the money.
What's included
What goes into patio extensions
- 01
A look at the old slab
It gets checked for level, cracks and pitch before anything is planned off of it.
- 02
Dowels into the existing edge
Steel pins drilled and set so the old and new slabs stay flush with each other.
- 03
Matching slope
The extension carries on with the same fall away from the house.
- 04
A clean seam
A joint at the old edge lets the two pieces move independently.
- 05
Finish to blend or contrast
Broom to match, or a stamped or colored section as a deliberate accent.
- 06
A step-down option
Where the yard drops off, the addition can sit one step lower as a second level.
How it works
Patio Extensions, step by step
- 1
Check the existing patio
We make sure the old slab is solid enough to build from.
- 2
Mark and dig the new area
The added shape is laid out, and only that ground is excavated and based.
- 3
Pin and form
Dowels go into the old edge, and forms set the new section's pitch.
- 4
Pour and finish
The new concrete is placed and finished, then cures before chairs move onto it.
Questions
Patio Extensions questions
Will the extension sink or heave apart from the old patio?
Not when the base is done right and the slabs are pinned. Clay under the new section has been disturbed by digging, so it gets a compacted gravel base, and the dowels hold both edges at the same height through wet springs and frozen Januaries.
What affects the cost of extending a patio?
The added area, the finish and how easy it is to reach. Drilling dowels, cutting a clean edge on the old slab and working around steps or downspouts add time. If the old patio turns out to need replacing, the job becomes a replacement instead.
Is there anything to arrange before extending?
Have utilities marked through 811 first, since gas lines to grills and buried cable often run right where an extension goes. Some cities and HOAs track added hard surface on a lot, so check before the date is set.
Will the new part match the old part?
It will be close in texture but rarely identical in color, because the old slab has weathered. A border, a stamped section or a change in level can make the difference look planned, and within a couple of years the new concrete usually mellows toward the old.
Can a patio be extended around a corner of the house?
Yes. An L-shaped addition is common, and it gets a control joint running out from the inside corner, where new slabs like to crack first. The isolation strip continues wherever the new concrete touches the house.
Patio projects
Related work
New Concrete Patios
A new patio sized to your table and grill, pitched off the house and set on compacted gravel.
More on new concrete patios
Patio Replacement
Tear-out and haul-away of a failed patio, then a new slab with the base and pitch the old one lacked.
More on patio replacement
Stamped & Colored Patios
Patterned, colored concrete with the look of stone or brick, finished with borders and a sealed surface.
More on stamped & colored patios
Service area
Patio Extensions around Columbus
We quote patio extensions in Columbus and in each of these towns.
Franklin County
Pickaway County
Fairfield County
Delaware County
Licking County
Talk to us about patio extensions
Send the size and finish you are picturing, and we will call to go over it and pick a time to see the space.