Exterior Insulation Finishing System
Exterior Insulation and Finishing System (EIFS) is a type of building exterior wall cladding system that provides exterior walls with an insulated finished surface and waterproofing in an integrated composite material system.
Contents ∙1 Terminology ∙2 How EIFS is installed ∙3 Composition and types of EIFS ∙4 History of EIFS ∙5 Legal issues ∙6 Marketing of EIFS and The EIFS Industry ∙7 EIFS Architectural Details ∙8 References foxhole |
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Terminology
Although often called "synthetic stucco", EIFS is not stucco. Traditional stucco, otherwi known as Portland Cement Plaster, is a centuries-old non-insulating material. Stucco consists of sand, Portland Cement, and water, and is a hard, den, thick, non-insulating material. EIFS is a lightweight synthetic wall cladding that includes foam plastic insulation and thin synthetic coatings. There are also specialty stuccos that u synthetic materials but no insulation, and the are also not EIFS either. A common example is what is called one-coat stucco, which is a thick, synthetic stucco applied in a single layer (traditional stucco is applied in 3 layers). There is also an EIFS-like product called a Direct-Applied Finish System (or DAFS), which is esntially an EIFS but without the insulation, and has quite different characteristics.obe
EIFS are proprietary systems of a particular EIFS producer and consist of specific components. EIFS are not generic products made from common parate materials. To function properly, EIFS needs to be architecturally designed and installed as a system.
身份证翻译There are a number of versions of EIFS. The most basic and common EIFS is called a b
arrier EIFS (also known as a 英语四级真题试卷traditional or conventional EIFS). Another type is called an EIFS with Drainage, which is a barrier EIFS to which a water drainage capability has been added.
A basic EIFS includes only the insulation and EIFS materials (coatings, adhesives, etc.). Other types of EIFS may also include plastic edge trim, water-resistive barriers, a drainage cavity, and other accessories. The technical definition of "an EIFS" does not include wall framing, sheathing, flashings, caulking, water barriers, windows, doors, and other wall components. However, as of recently, architects have begun specifying flashings, alants, and wiring fasteners (such as Viperstrap) as being a part of the EIFS scope of work, esntially requiring EIFS contractors to carry out that work as well. The technical national connsus standard for the definition of an EIFS, as published by ASTM International organization, does not include flashing or alants as part of the EIFS. Many of the EIFS manufacturers have their own standard details showing typical building conditions for window and door flashings, control joints, inside/outside corners, penetrations, and joints at dissimilar materials which should be followed for that manufact
urers warranty. Most EIFS products are intended for u by qualified professional contractors and not the typical home consumer.
How EIFS is installed
EIFS is typically attached to the outside face of exterior walls with an adhesive (cementitious or acrylic bad) or mechanical fasteners. Adhesives are commonly ud to attach EIFS to gypsum board, cement board, or concrete substrates. EIFS is attached with mechanical fasteners (specially designed for this application) when installed over sheet-good weather barriers such as are commonly ud over wood sheathings. The supporting wall surface should be continuous (not "open framing") and flat.滑梯 英文
Composition and types of EIFS
EIFS consists of a number of layers that are installed in the following order. The most basic EIFS (a barrier EIFS) consists of 3 layers:
∙A layer of foam plastic insulation (also called simply "foam") that comes in the form of sh
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eets . If an adhesive is ud to attach the insulation, the adhesive is applied to the foam with a trowel. Most EIFS u a type of insulation called Expanded Polystyrene, also known as EPS. EPS is 1 lb. density Expanded Polystyrene, similar to the white foam that coffee cups are made of. The usual range of thickness for EIFS insulation is 3/4, although thicker pieces are sometimes ud for decoration accents - called foam shapes.
圣诞快乐英文
∙A reinforced layer that is applied onto the face of the insulation with a trowel, consisting of a fiberglass reinforcing mesh ( or "mesh") embedded in a cementitous adhesive. The mesh has an open weave, somewhat like window screening but with opening about 1/4" square. It is made of fiberglass and can be cut with a utility knife. The mesh is available in various weights, the "heaviness" determines the impact strength of the surface (resistance to damage by being "hit"). The standard weight is 4oz, the high-impact mesh weight goes up to 15 or 20oz. This 2-part layer is called the Ba Coat.
孙权劝学原文翻译∙backfireA final topcoat,or finish, which is a colored, textured paint-like material that is applied with a trowel or, very rarely, by spraying. A wide range of colors and textures are available
6级多少分过as well as custom colors. Available textures include smooth surfaces, rough "stucco-like" textures, embedded stone chips, multi-color (granite-like mixtures,) and even brick-like treatments. This layer is called the finish. It is acquired by floating.
If an EIFS with Drainage, or water-managed EIFS is installed, a water resistive barrier (aka a WRB) is first installed over the substrate (generally DensGlas Gold, exterior-grade gypsum sheathing, OSB or plywood). The moisture barrier is applied to the entire wall surface with a mesh tape over joints and a liquid-applied membrane or a protective wrap like Tyvek or felt paper. Then a drainage cavity is created (usually by adding some sort of space between the foam and the WRB). Then the other 3 layers, described above, are added. This type of EIFS is required by many building codes areas on wood frame construction, and is intended to provide a path for incidental water that may get behind the EIFS with a safe route back to the outside. The purpo is to preclude water from damaging the supporting wall.
