Flashing and Roof Accesories Flashcards Preview

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Flashcards in Flashing and Roof Accesories Deck (18)
1

expansion joints:
location

every 100-150ft @ masonry,

200ft concrete.

and where low portion abuts higher heavier section.

2

smoke vents:
generally located in

hazardous occupancies,
group B over 50,000ft2,
over stages,
above elevator shafts.

3

spring loaded and connected to fusible link.

smoke vents:

4

flexible materials to close joints between materials.

Sealants

5

low-performance sealants @ little movement

Caulking

6

sealant depth allowance:

joint width up to 1/2"

depth = width

7

sealant depth allowance:

joint width 1/2" – 1"

1/2" deep

8

sealant depth allowance:

joint wider than 1"

depth not greater than
1/2 x width

9

used behind sealant to control depth of sealant.

joint filler

10

(EIFS)

Exterior Insulation and Finish Systems

11

cladding assembly.

wet-applied cementitious finish,

over rigid insulation board attached to bldg sheathing.

typ polymers or mix of cement and polymer.

(EIFS)

12

use expanded polystyrene insulation,
w basecoat applied directly,
w embedded fiberglass mesh.

polymer based (Class PB)

(EIFS)

13

*high impact PB variant:

includes heavy-duty fiberglass mesh,
and additional layer of base coat.

14

EIFS class PB advantage:

great flexibility, bc bas coat has high % polymeric binder

15

extruded polystyrene mechanically fastened to sheathing,
along w reinforcing mesh.

polymer modified (Class PM)

(EIFS)

16

PM EIFS include higher %

portland cement,

= control joints needed to limit cracking
(10-12 ft apart, no section >150sqft)

17

EIFS more resistant to impact, and slightly higher thermal resistance and water penetration resistance

PM

18

mineral based EIFS ex

portland cement stucco (class MB)