Serious question, choosing between a magnesium and aluminum float for a big garage floor job

I had a 40 by 60 foot garage slab to finish in Spokane last month, and the boss gave me the choice between the old magnesium float or a new aluminum one. I went with the magnesium because I thought it would cut better on the cooler day, but it actually dragged and left marks in the surface. What's your go-to float for a big, flat job like that when the weather's not perfect?

3 comments

3 Comments

the_piper16d agoMost Upvoted

Yeah, magnesium can drag like that, I had the same thing happen on a cool morning pour last fall.

alicecooper5d ago

That's why I switched to aluminum like lilykelly, never looked back after a bad drag.

lilykelly16d ago

Aluminum every time for me, it just glides better no matter the temp.