LB & SONS Inc.
Services
General Construction & Subcontactor Services
Complete Tenant Renovations
Facility/Maitenance Services
Lathing and Plaster Specialist
-2 coat veneer over blueboard
-3 coat over metal Lath
Historic Renovations Specialist
-Window and Doors
- Homeowners, architects, designers and developers are rediscovering the beauty and utility of lath and plaster.
This elegant marriage of form and function is increasingly used in a range of construction projects, spanning from upscale private residences to high-rise commercial buildings.
Lath and plaster offers a range of aesthetic, safety and cost benefits.
Outstanding Fire Resistance
A typical metal lath and plaster wall provides twice the fire resistance of drywall.
For instance, builders can attain a two-hour fire rating with a mere 2.5 in. of metal lath and plaster (test #GA-WP-1930). To achieve the same level of fire resistance, it would require 5 in. of a drywall configuration (test #UL Des U454). Indeed, new lath and plaster configurations are able to achieve a two-hour fire rating with just 2 in.! This allows their use around elevator shafts and for construction of fireproof "chases."
This maximizes the square footage available for occupant space and optimizes trades sequence scheduling.
Safety and Strength
Developers are using lath and plaster in public spaces, such as lobbies and hallways, because of its long-lasting sturdiness and performance.
Modern plasters now offer compressive strengths from 3,000 to 10,000 psi. Impact strength ranges from 1,300 to 1,750 g/sq. cm. Such strength provides the owner, architect and contractor with greater abuse resistance and durability than ever before.
Plasterers can plaster either solid surfaces, such as concrete block, or supportive wire mesh called lath. When plasterers work with interior surfaces, such as concrete block and concrete, they first apply a brown coat of gypsum plaster that provides a base, which is followed by a second, or finish, coat—also called “white coat”—made of a lime-based plaster. When plastering metal lath foundations, they apply a preparatory, or “scratch,” coat with a trowel. They spread this rich plaster mixture into and over the metal lath. Before the plaster sets, plasterers scratch its surface with a rake-like tool to produce ridges, so that the subsequent brown coat will bond tightly.
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