Question

What type of insulation is used for work on flat roofs, on basement walls, as perimeter insulation at concrete slab edges, and in cathedral ceilings? a) Rigid board insulation b) Spray foam insulation c) Batt and blanket insulation d) Reflective insulation

Answer 1

Rigid board insulation is used for work on flat roofs, basement walls, perimeter insulation at concrete slab edges, and in cathedral ceilings due to its high R-value and moisture resistance.

Step-by-step explanation:

The type of insulation commonly used for work on flat roofs, on basement walls, as perimeter insulation at concrete slab edges, and in cathedral ceilings is rigid board insulation. This material is chosen for its ability to provide a high R-value, which indicates its effectiveness in preventing heat transfer. Rigid board insulation is well-suited for these applications because it is dense, moisture-resistant, and can be applied in various thicknesses to achieve the desired insulation level.

When discussing insulation, it is important to consider the R factor, which represents the ratio of thickness (d) to thermal conductivity (k). The R factor is directly linked to the insulation's effectiveness: a higher R value means better insulation. For example, 3.5-inch-thick fiberglass batts have an R factor of 11, while 6.5-inch-thick batts have an R factor of 19. Although fiberglass batts are commonly used for walls and ceilings, rigid board insulation is often preferred for the specific scenarios mentioned in the question.

Answer 2

The correct answer is A

Step-by-step explanation:

Rigid foam board insulation is the one which comprise of the sheets of polyiso, polyurethane or polystyrene foam which is a closed cell as opposite of the open cell.

Closed cell board insulation is strong and possesses the higher R value than the open cell insulation.

Rigid board insulation is the kind of insulation which is used for work on the basement walls, on the flat roofs as a perimeter insulation at the concrete edges of slab.