What isolation joint means
An isolation joint separates a slab from things that move differently, such as walls, columns, steps and drains, so the slab can move on its own.
Where it matters on a concrete job
Slabs poured tight against a house or column crack at the corners. Put foam or filler board at those edges before the pour.
What it costs
The concrete patio cost guide has the typical job at $3,950 and the usual range at $1,900 to $6,000. The guide shows its sources and what moves the price. The concrete slab cost calculator prices a job line by line.
Work it out
- Free calculator: Concrete slab cost calculator
- Cost guide: Concrete patio cost
- Tools, templates and guides: Free concrete resources