Ultimately, it's all relative to what weight you are planning to put on it. These are much lighter than plywood, so that itself helps to reduce the overall weight.
Unfortunately no you cannot cut these to fit.
yes you can hard to crawl on because of the plastic
no you do not need to build up in order to lay down Attic Dek. I am assuming you have blown in insulation. You can compress the insulation with little to no impact on the rating.
Thank you for your interest in AtticDek. Yes, screws are included. You should receive 5 screws per panel. A 4-pack should come with 20 screws.
The panels do not attach but lay alongside each other and are separately screwed into the joists. It is an easy installation. They do not snap together. I prefer this so I can stagger the units. I place a few in a row and then place another row about 6 inches apart. The gap is narrow enough to hold my boxes and wide enough so I use fewer units for a cheaper installation. Tip: Install them in the winter-time, or else stay hydrated.
I did 80 square feet and used, dry wall screws. Perfect attachment to the joists and to each other.
I have had my tiles in my Florida attic for over a year and they stand up extremely well to the brutal summer heat. BTW, there is no such thing as heat deflection on this product! It is simply a very hard plastic. It works as flooring or as a path to other parts of the attic.
SB - I can assure you that each of the units can easily handle 250 pounds...and when added together, with the interlocking sides (see picture), it can only increase the load.
Well, JM...do the math. Each of these 16 x 24 inch panels is 2.66 square feet. So...4 times 2.66 is? I think you get the point. Another point you are obviously missing is that these 'tiles' mean you don't have to rip 4 x 8 foot plywood and slide them into the attic and then nail...just carry up what you need of these tiles.