Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

Is expansion joint necessary against foundation to prevent problems?

0
10 Posted

Is expansion joint necessary against foundation to prevent problems?

0
10

Not usually… if the new concrete has at least one edge that’s not abutted by a wall or another slab… as long as the new slab has a direction it can take to settle… it should be O.K. I usually install expansion felt (or similar) whenever new concrete is poured to a wall but it’s really not necessary. The “control” joints (grooves in the concrete) should be made no less than 8′ apart. We know that concrete will crack… we want to control where it happens.

Thanksgiving questions

*Sadly, we had to bring back ads too. Hopefully more targeted.