12 inches
The best materials for installing flat roof insulation are rigid foam boards or spray foam insulation. These materials provide good thermal resistance and are easy to install. The most common methods for installing flat roof insulation include placing the insulation boards on top of the roof deck or between the roof joists. It is important to ensure proper sealing and ventilation to prevent moisture buildup and ensure the insulation's effectiveness.
You can find your answer in the documentation for the brand of insulation used in your condominium building. The builder should be able to provide this detail. As well, your Reserve Study may indicate -- together with the age of the roof -- the useful life of the insulation under it. You can obtain a copy of your Reserve Study from a board member.
The flat board is a palette.
If the cut is parallel to the long dimension, then each piece is 40 inches long, but its width is 1/2 of the original board's width. If the cut is parallel to the short dimension, then the width is preserved, and each piece is 20 inches long. If the cut is parallel to to the flat, then each piece is 40 inches long and has the original width, but is only 1/2 the thickness of the original board.
Installation is installed in a few different ways depending on the type. Loose insulation is simply sprayed into openings, while rolled insulation is laid flat against surfaces.
A flat piece of wood is called a board.
A jointer is used for putting a straight edge on a board. A planer is used for obtaining a flat surface on the board. With a jointer, you run the board through on it's edge, and with a planer you generally run the board flat.
pegboard
This is not an idiom. When you see AS ___ AS ___ you are looking at A Simile. This is comparing two flat things.
Six inches
A jointer is used to create a flat surface on the edge of a board, while a planer is used to make the entire surface of a board flat and even.
You only need 8-10 inches. That is enough for insulation. You only need enough to put in the insulation you want. I'm in Arizona and only have 1' between the ceiling and a flat roof. But it's full of insulation. Works for me. Possible help added: A ridge vent for a pitched roof is a great way to help keep the heat down in an attic.