Trafficmaster Allure vs Allure Ultra

[Ryan Cheung]

Hi,

I am looking to install vinyl flooring on a 3rd floor unit. After removing the existing carpet, I found that there are only plank subfloors, and no plywood. The subfloor will be secured and nails/staples will be removed, however, it will not be perfectly flat. I have been doing some research online, and have found that vinyl is better than laminate since it is flexible. 

My question is whether the grip strip or interlocking vinyl planks are best for my situation? Will any unevenness cause the interlocking seams to break? Any recommendations or advice will be greatly appreciated. Thanks!