Flashing and Roof Accesories Flashcards
expansion joints:
location
every 100-150ft @ masonry,
200ft concrete.
and where low portion abuts higher heavier section.
smoke vents:
generally located in
hazardous occupancies,
group B over 50,000ft2,
over stages,
above elevator shafts.
spring loaded and connected to fusible link.
smoke vents:
flexible materials to close joints between materials.
Sealants
low-performance sealants @ little movement
Caulking
sealant depth allowance:
joint width up to 1/2”
depth = width
sealant depth allowance:
joint width 1/2” – 1”
1/2” deep
sealant depth allowance:
joint wider than 1”
depth not greater than
1/2 x width
used behind sealant to control depth of sealant.
joint filler
(EIFS)
Exterior Insulation and Finish Systems
cladding assembly.
wet-applied cementitious finish,
over rigid insulation board attached to bldg sheathing.
typ polymers or mix of cement and polymer.
(EIFS)
use expanded polystyrene insulation,
w basecoat applied directly,
w embedded fiberglass mesh.
polymer based (Class PB)
EIFS
*high impact PB variant:
includes heavy-duty fiberglass mesh,
and additional layer of base coat.
EIFS class PB advantage:
great flexibility, bc bas coat has high % polymeric binder
extruded polystyrene mechanically fastened to sheathing,
along w reinforcing mesh.
polymer modified (Class PM)
EIFS
