Red Seal Lather (ISM) case studies
Red Seal Lather (ISM) · Put your knowledge to work in context.
The Red Seal Lather (ISM) certification is an interprovincial trade credential for workers who build the substrates and finishes behind walls and ceilings: metal stud framing, furring, suspended ceiling grids, gypsum board, sheathing, lath, plaster, stucco, insulation, vapour barriers, and air barriers. It signals that a lather can lay out, install, and finish these systems to Canadian building-code and manufacturer requirements across residential, commercial, and institutional projects. The Red Seal Lather (ISM) case studies are 5 cases and about 4,716 words.
1Exposed-Tee Grid in an Occupied Hospital Corridor: Head Alignment vs. Module
Renovation of the ground-floor corridor in an occupied 1970s hospital: 38 m long, 2.40 m clear width, finished ceiling at 2 700 mm. The scope replaces an existing 600 × 600 lay-in ceiling with a new 24 mm exposed-tee grid and 600 × 600 mineral-fibre tiles.
923 words, about 5 min2Two-Hour Separation Built with the Wrong Board and an Untested Acoustic Change
Six-storey mixed-use building. A 2-hour fire separation is required between a ground-floor commercial kitchen and the residential suites.
964 words, about 5 min3Failed Airtightness Test on a Cold-Climate House at Finishing Stage
New two-storey house in a cold climate. Walls are 38 × 140 mm studs at 400 mm o.c., OSB sheathing, 25 mm exterior XPS, 6-mil polyethylene air and vapour barrier on the warm side, lapped and sealed, with 12.7 mm board.
949 words, about 5 min4Three-Coat Stucco: Grade Raised to the Weep Screed and a Compressed Cure
Three-coat stucco - scratch, brown, finish - over 12.7 mm glass-mat gypsum sheathing on 38 × 140 mm wood studs at 400 mm o.c., two storeys, coastal climate with driving rain. Scope is 240 m² of wall.
996 words, about 5 min5Textured Ceiling Removal: Undetermined Asbestos and Visible Dust
Renovation of ten suites in a 1979 apartment building. The ceilings have a hard, painted-over textured stipple finish.
884 words, about 4 min