Attic Walkway Over Insulation

If you can make the walkway 2 wide it most likely would not be necessary.

Attic walkway over insulation.

However if you need to make it narrower i would recommend standing some unfaced blanket insulation on end along the edges of the walkway to hold the loose. You could also lightly spray for insects over fiberglass if needed. The trail you leave in the attic can easily end up tracing a path on the ceiling below. Exposed floor joists can cause condensation on the inside of the ceiling peeling paint and nail rusting.

Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and to prevent thermal bridging the heat loss that occurs through the wood framing. Work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just put in. Walk to one end of the attic by carefully stepping only on the wooden ceiling joists. I would recommend fiberglass blown in insulation rather than cellulose because it is not conducive to insects.