Nowadays, manufacturers are developing fiberglass gypsum sheathing
since these materials are non-combustible, cost-efficient, easy to install and enhance the performance of exterior walls by resisting air and water infiltration, and noise transmission.
Stevens Construction crews made sure they put in enough time on the project to meet an aggressive eight-month schedule that called for 35 separate concrete pours, a majority of which took place during the winter.<br />Hidden behind the veneer is a new and innovative ExoAir sheathing product, which was made with gypsum sheathing
with a factory-applied fluid air barrier.
The walls of the buildings in the seven examples were constructed with gypsum wallboard, an interior vapor retarder, fiberglass batt insulation, OSB or plywood sheathing, gypsum sheathing
for fire protection in most cases, housewrap or building paper WRB, and contact-applied vinyl siding.
Among the topics are energy and moisture impact of EIFS walls in the US, exterior continuous insulation and the positive impact on building envelope performance--achieving new energy code wall insulation metrics, energy saving from an EIFS retrofit of a single-family dwelling, using glass mat gypsum sheathing
as a substrate for EIFS, and the applicability of fluid-applied air and water-resistive barriers in EIFS for use in other cladding systems.
Sheet-Applied (Exterior Air Barrier)--The surface of the exterior gypsum sheathing
is wrapped with a sheet-applied membrane (e.g.
Ultimately, all stucco and most of the exterior gypsum sheathing
, as well as substantial amounts of water-damaged interior finishes, had to be replaced.
In addition, the rubberized asphalt adhesive provides a waterproof membrane that sticks to most clean, dry, smooth surfaces, including prepared concrete and concrete masonry, plywood and OSB sheathings, DensGlass Gold, gypsum sheathing
, cement board, asphalt saturated felt and most housewraps.
In addition to Dens-Shield tile backer, G-P Gypsum also manufactures Dens-Glass Gold[R] gypsum sheathing
, another member of the company's innovative family of Dens-Products, and ToughRock[TM] brand gypsum board.
Shaded areas in the figures included in Figure 1 represent the sheathing panels (OSB or plywood on one side and gypsum sheathing
on the other side).
The predominant reason for EIFS failures appeared to be water damage to the gypsum sheathing
. In many instances of damage, both the EIFS and gypsum sheathing
had been blown off, leaving only the metal studs.
The permeance of the gypsum sheathing
is too great: 30 perms to 50 perms.