Since 1969 building owners, architects and contractors have used Dryvit for exterior insulation and finish system. Dryvit is one of the Exterior Insulation and Finish Systems (EIFS). EIFS are multi-layered exterior wall systems that are used on both commercial buildings and homes.
Developed in Europe in the 1950s, EIFS were introduced in the U.S. almost 40 years ago. They were first used on commercial buildings, and later on homes. Today, EIFS account for nearly 30% of the U.S. commercial exterior wall market.
EIFS typically consist of the following components:
- insulation board, made of polystyrene or polyisocyanurate foam, which is secured to the exterior wall surface with a specially formulated adhesive and/or mechanical attachment,
- water-resistant base coat, which is applied on top of the insulation and reinforced with fiber glass mesh for added strength, and
- finish coat — typically using acrylic co-polymer technology.
Description Of Wall
During June 2002, the Dryvit wall was built and tested in the guarded hot-box under steady-state conditions. The tested Dryvit wall was based on light gauge steel framing. Conventional 3.5-in. solid-web C-shape studs were installed at 16-in. o.c. The cavity was insulated using R-11 fiberglass batts. The interior wall surface was finished using 0.5-in. gypsum board. On the exterior side, the three following layers were installed; 0.5-in. gypsum board, 2-in. EPS foam sheathing, and 0.1-in. thick layer of Dryvit plaster.