Insulation: Part 2

Question 1

fibrous mat’l placed on/within kraft paper carrier.

typ mineral/glass fiber.

Answer 1

batt insulation

Question 2

purpose of paper in batt insulation

Answer 2

holds in place, and vapor retarder.

Question 3

batt insulation available w flame resistant surface, for

Answer 3

basement walls if left exposed.

Question 4

plastic fiber insulation:

Answer 4

made from recycled PET milk bottles,

formed into batts similar to high-density fiberglass.

Question 5

organic mat’ls used in board insulation:

Answer 5

wood, cane fiber, straw, perlite, cork.

Question 6

most common type board insulation:

Answer 6

inorganic

Question 7

board insulation:

advantages inorganic

Answer 7

higher insulating values

2-3x @ same thickness as organic

Question 8

board insulation:

inorganic materials used

Answer 8

polystyrene, extruded expanded polystyrene,

polyisocyanurate, polyurethane.

Question 9

board insulation:

inorganic materials blowing agent (in manufacturing)

Answer 9

originally CFC’s (out ‘96),

now HCFC’s (still depleting ozone),

replacements:
hydrocarbon HC,
carbon dioxide CO2.

Question 10

closed-cell.
produced mixing unexpanded polystyrene beads containing liquid pentane,
and blowing agent.
heated to expand beads, injection molded into block.

Answer 10

beadboard

molded expanded polystyrene (MEPS)

Question 11

molded expanded polystyrene (MEPS):

most common density

Answer 11

1lb/ft3

Question 12

molded expanded polystyrene (MEPS):

problem w spaces between beads

Answer 12

can absorb water, so vapor retarder req’d in moisture migration is concern.

Question 13

closed cell.
mixing polystyrene pellets w various chemicals,
and blowing agent.
forced thru extruder, atmospheric pressure causes expansion.

Answer 13

extruded expanded polystyrene (XEPS):

Question 14

extruded expanded polystyrene (XEPS)

compared w

MEP

Answer 14

> insulation value per thickness
and
> compressive strength than.
> $
>superior resistance to water absorption

Question 15

extruded expanded polystyrene (XEPS)

use:

Answer 15

residential sheathing and wall/foundation/roof insulation.

Question 16

only insulation for membrane roof systems/below grade insulation.

Answer 16

extruded expanded polystyrene (XEPS)

Question 17

close cell foam w low-conductivity gas in the cells.

Answer 17

polyisocyanurate: aka “polyiso”

Question 18

closed cell,
density 2lb/ft3,
no HCFCs,
r-value 6.5–7
most $.

Answer 18

polyurethane