Full Answer
What is metal lath used for?
Metal lath is used as a platform to embed and attach the stucco cementitious membrane to the structural members of the building. Without the lath there would be little or no way to apply stucco to open frame or sheathed construction.
What are expanded metal laths?
Expanded Metal Lathing is mainly used as a key for internal and external plaster when applied on suspended ceilings and walls. It is also suitable for encasing steel columns and beams, assisting in the protection from fire.
How is expanded metal lath made?
Expanded Metal is produced from solid sheets or plates of carbon, galvanized and stainless steel, as well as aluminum and a variety of alloys of copper, nickel, silver, titanium and other metals. Because expanded metal is made from a solid sheet of metal, and it is not woven or welded - it can never unravel.
How thick is expanded metal lath?
Thickness – The nominal thickness of diamond mesh and flat rib metal lath shall be 1⁄8 in. (3.2 mm). The nominal thickness of other rib metal lath shall be as designated, 3⁄8 in. (9.6 mm).
Why are expanded metal lath used in plastering?
Expanded Metal Lath Offers Wall Reinforcement and Prevents Cracking. Expanded metal lath is widely applied on wall, ceiling and other building plastering works, including the reinforcement and renovation of joints and cracks as it offers better plaster bonding property and enhanced crack resistance.
What does lath stand for?
Lath definition A thin strip of wood or metal, usually nailed in rows to framing supports as a substructure for plaster, shingles, slates, or tiles. noun. 1. A building material, such as a sheet of metal mesh, used for similar purposes.
What is expanded metal mesh used for?
Expanded metal is frequently used to make fences, walkways, and grates, as the material is very durable and strong, unlike lighter and less expensive wire mesh. The many small openings in the material allow flow through of air, water, and light, while still providing a mechanical barrier to larger objects.
Do you need metal lath over cement board?
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.
Can you walk on expanded metal?
The surface is naturally slip resistant and for that is used primarily for pedestrian traffic. Expanded metal grating allows snow, water and oil to drain off easily making a practical yet economical way to assure strength and safety in a walking surface.
Why is it called expanded metal?
Standard Expanded Sheet: A finished product as it comes off the press after being cut and expanded. Often referred to as raised expanded metal, due to the alternating ridges formed by overlapping metal strips.
What is another name for expanded metal?
Expanded metal is also referred to as perforated metal. It is a large part of the metal industry and plays a key role in metal fabrication.
Does lath provide structural support?
The lath also provides a means of attachment for the entire stucco membrane to the structural framing and furring system.
What is a metal lath wall?
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 the difference between perforated metal and expanded metal?
Much like expanded metal, perforated metal is produced through piercing the material with bespoke tooling to offer an array of shapes such as circles, squares and diamonds. However, unlike expanded metal, perforated metal is punched and not stretched and therefore produces waste material.
What are the different types of expanded metal?
There are 4 main types of expanded metals: standard expanded metal, flattened expanded metal, expanded metal mesh and expanded metal grating. They all start as a metal sheet, but evolve into their respective types.
What is lath coat?
Lath is simply the first step in the stucco process. It consists of water resistant paper, (sometimes eps foam) wire and other metal components that make up the essential “framework” for the cement to be adhered to. It attaches to the substrate and is the structure for the following coats.
What is a structural reinforcement lath?
Stucco Reinforcing Structa Wire lath is a welded wire lath, engineered to enhance the performance of stucco cladding and is a part of the ClarkDietrich Easy Embedment System.
What is a heavy gauge lath?
A Heavy-gauge lath for Enhanced protection from breach Diamond Security Lath is an expanded steel base used for interior and exterior plaster and stucco reinforcement for secured applications where advanced breech protection is required.
What is 1/4" self furring?
1/4" self-furring, dimpled, Expanded Steel Plaster and Stucco Base A self-furring expanded dimpled metal lath ideal for interior and exterior use over sheathing, masonry, and other solid surfaces as required per ASTM C847, ASTM C1780, ASTM...
What is the most rigid lath?
The most rigid of all expanded metal lath products A High-Rib Metal Lath with a herringbone mesh pattern and seven, 3/8" deep, longitudinal, solid steel ribs at intervals of 3-7/8" across the sheet. These ribs provide the superior...
What is metal lath?
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. The openings in the lath enable plaster to key around the metal to assure a secure bond and a flat, smooth surface plane upon completion of the plaster application. Metal lath comes in a variety of configurations, including self-furring (dimpled and continuous groove for use over solid substrates ASTM C1063) and paper-backed, to meet specific job requirements and plaster/stucco preferences. ClarkDietrich products meet or exceed the requirements of ASTM C847.
What is striplath used for?
Reinforcement for corners, windows, doors and openings Striplath is a flat, expanded metal strip used as plaster reinforcement over joints of solid bases and where dissimilar bases join. It is flexible for use over irregular surfaces.
What is expanded metal lath?
Expanded metal lath acts as a versatile base for cementing plaster walls, ceilings for internal and external applications, so it has another name: plaster mesh. It is manufactured from prime quality steel sheet which is slit and stretched to form large number of small diamond openings, providing more plaster keys than any other lathing material.
Why do buildings crack?
As is known to us all, cracks of buildings are usually caused by seasonal changes in humidity. To avoid cracks that may cause a lot of trouble, expanded metal lath should be taken into account when plastering walls, floors or ceilings.
Which lath has the most adhesion to plaster?
One piece of expanded metal lath, its ribbed surface offers the most adhesion to the plaster.
