My house was built in 1992. There are currently faced batts of fiberglass and a few inches of white blown-in insulation that is both scattered in some areas (mostly over the master bedroom from ceiling fan insulation and replacing the bathroom exhaust fan).
In my ideal world, I want to put down plywood for walking paths to areas where I need to do maintenance - bathroom exhaust fans and above ceiling electrical. Even better would be using some of the space for storage of holiday decorations and other low use stuff.
I am just outside Chicago, so nothing that could freeze would be in the space.
Can I install plywood (probably 3/4 to be safe - I weigh around 250) over the existing insulation?
I think (will need to verify) that this might compress the backed fiberglass. Will that cause any issues?
I want to add more insulation when this is all done. I assume (possibly incorrectly!) that I can add insulation on top of the plywood I install. I have not decided if I want to use more faced batts or blown in, I am leaning toward batts as the blown in seems to VERY messy.
I found a reference to loft flooring legs, but I don't see them available in the US, only the UK. Attic Dek flooring looks to be more expensive than what I want, but it also looks like it would not interfere with R value of insulation. I would just have to be VERY sure where it is when I use it for walking.
I found 'Attic Decking Kit for a Storage Floor Above Deep Attic Insulation (8ft X 8ft Kit)', which looks like loft flooring legs, but is $200 for an 8X8 setup. Does anyone have experience with this? For storage it would be lighter boxes, under 50 pounds each for sure.
Is there a better way to do this? The access routes would only be used on occasion, but the storage area would be used most of the year.