Pouring a concrete riser on a pre-existing concrete floor
September 7, 2010 12:42 PM Subscribe
What's the best way to pour a raised concrete slab on top of a pre-existing concrete floor?
posted by bjork24 to Home & Garden (12 answers total)
We have a weird raised slab (24" by 30", and 2" tall) in our basement. I'd like to extend the slab further along the wall so it will be long enough to hold both our washer and dryer. Is it possible / advisable to pour concrete over concrete? How can I make a form that won't spill out from the bottom? I thought this would be a fairly trivial task, but googling for answers only yields people wanting to skim an entire new layer of concrete over a pre-existing slab.
To rehash, I simply need to pour a 2" concrete riser on top of an existing concrete basement floor. Looking for tips and/or advice. Thanks!