How thick is metal lath for stucco?
Thickness: Standard diamond metal lath: 1/8″. Depth of dimples and grooves: 1/4″. Overall depth of the lath: 5/16″ (7.9 mm).
What is metal lath for stucco?
Metal lath provides a lightweight and easily attachable base for plaster application. Made from expanded steel, the lath generally is applied flat across the stud plane and attached with staples, nails, or wafer head lath screws.
What is galvanized metal lath used for?
Galvanized, Expanded Steel Plaster aND Stucco Base Metal lath is useful in general purpose applications and is the best lath available for ornamental work and for flat or contoured surfaces as well as for use as a reinforcing underlay for spray-applied fireproofing.
Do I need metal lath on concrete?
What surface do I need metal lath on? For all exterior applications, install metal lath and scratch coat on the structurally sound rigid sheathing. Note: However, for clean and unpainted concrete and masonry surfaces, stone veneer may be directly applied without use of metal lath/scratch coat.
Do you need lath for stucco?
Stucco walls typically have three coats of plaster. Without the proper support, the force of gravity pulls the stucco off vertical walls. That’s where metal lath under stucco comes into play.
What is a metal lath construction?
Metal lath, a mesh formed by expanding a perforated metal sheet, is made in a variety of forms (diamond-mesh, flat-ribbed, and wire lath). The sheets of metal are slit and drawn out to form numerous openings, creating an irregular surface for the keying of the plaster.
When was metal lath used?
19th century
Metal lath dates from the late 19th century and is used extensively today with plaster and stucco in home and commercial construction. In addition to providing a matrix to which the stucco can adhere, metal lath adds strength and rigidity. .
Which way do you hang metal lath?
For the metal lath, attach 2.5 lb. expanded, galvanized, metal lath to each stud 6” on center-vertically, penetrating the studs at least one inch. Be sure to attach the lath horizontally. The surface should feel rough as you rub your hand upward.
How do you lay lath on concrete?
Hold the lath against the wall with the diamonds created from expanding the mesh pointed upward. Secure it in place using 7/8-inch concrete nails with a washer over the nail shaft to hold down the mesh strands. Drive the nails through the mesh into the concrete wall using a hammer.
What kind of lath is used on stucco walls?
Also see STUCCO WALL METHODS & INSTALLATION for a discussion of exterior uses of stucco and metal lath. Plaster of the same general formula as discussed in the two wood lath based installations above was later applied over expanded metal lath.
What are the different types of plaster lath?
Expanded metal lath – diamond mesh plaster lath, formed from sheet metal cut into a diamond pattern, pulled to an expanded shape. Photo above: expanded rib lath with stiffening ribs.
Can you use flat diamond mesh over stucco?
Flat diamond metal lath is nor used over solid surface like gypsum, concrete and wood sheathing. Because flat sheet will only cause the stucco to bond only to the sheathing and not complete the embedding process. Therefore expanded metal mesh is usually self-furred: dimpled and V-grooved.
What kind of lath is sheet metal used for?
Sheet metal lath is slit and expanded into small diamond openings (approximately 11,000 per square yard). We supply sheet metal lath in two types: diamond metal lath and rib meta lath. Flat diamond metal lath is nor used over solid surface like gypsum, concrete and wood sheathing.