Hi, 

I tore out some old carpet and baseboards in a small 7×15 room on the second floor of our house. This part of the house is a twenty year old addition. I was hoping to put in laminate floors, but I’m concerned about how unlevel the floor is. Over the 14 foot length, there’s a 3/8 in sag toward the middle.

I understand laminate needs a very level surface, so I suspect this doesn’t cut it. I know there are leveling substances I can put down, but with that size gap, I’m afraid it would add too much weight to that joist. Does anyone have any advice?

Thanks!

Rich