Whether you need drywall, insulation, acoustical tile or construction accessories, we've got your jobsite needs covered. Historical Background 2. We just put a new roof on so that is not a problem any longer. John, Schumacher. Capitol Building Supply serves both commercial and residential customers and offers the largest inventory of construction supplies in Maryland, Virginia, and Washington D.C. All of our employees pride themselves on being hard working, safe, and professional. But you never know. It is seen as sand in certain areas. It can also be used to create architectural mouldings such as ceiling roses, cornices, corbels, and so on. Plasterboard with round holes punched at regular intervals substituted for the plaster scratch coat, nailed to wall studs, eliminating the wood lath requirement. Details about the types and uses and installation instructions for fiberboard-based and fiberboard-plaster-laminate based plaster systems are, More about fiberboard products used as exterior and interior sheathing as an insulating board is. The lath is nailed with hand-wrought nails. That's called a rock lath ceiling. Our photo (above) shows mortar passing through the holes in perforated board lath. The first two plaster coats would each be about 3/8" thick while the final coat was quite thin, just 1/8" in thickness. Our plaster wall and ceiling photos below demonstrate the stages in constructing an traditional plaster on lath surface. PLASTER TYPES & METHODS in BUILDINGS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. 28, No. Sorry. Finishes - Building material and construction product manufacturers organized by the product or the material into CSI master format divisions. 12.5.1 MATERIALS We use cookies to ensure we give you the best experience on our website. Plastering Skills [purchase at Amazon.com] F. Van Den Branden, Thomas L. Hartsell, Amer Technical Pub (July 1, 1985), ISBN-10: 0826906575, ISBN-13: 978-0826906571 [purchase at Amazon.com], Gypsum Construction Guide, National Gypsum Corporation, 2001 Rexford Road, Charlotte, North Carolina 28211, Tel: 704-365-7300, Email: ng@nationalgypsum.com, Website: http://www.nationalgypsum.com, Worsham, Gibson. Please re-post the image if you can. See FIBERBOARD PLASTER BASE SYSTEMS for a description of how fiberboard was used as a plastering base. a. Here is another photograph of a plaster wall test cut [photo] that shows a closeup of the layers of plaster board and top coats that make up the wall surface in a 1930's-built home whose plaster-board lath included wood fiber reinforcing materials. Like mortar I guess. Kal-Kore plaster base panels are designed as a base for veneer plaster, but these can also be used as basecoat plasters for Gypsolite, Two-Way Hardwall (National Gypsum products) or other conventional plasters. It is used for coating walls and ceilings and also for creating architectural designs. Evidence indicates that primitive peoples plastered their reed or sapling shelters with mud, thus developing more durable structures and more effective screens against vermin and inclement weather. Photo Guide to Types Interior Plaster: split wood lath, sawn wood lath, expanded metal lath, "rock lath" or plasterboard, drywall, & tainted Chinese drywall. 60 construction terms you may not know. I can wiggle the board front and back a few inches). A layer of plaster, or a pre-laminated plaster+Insulating gypsum-lath board comprised of a layer of wood or paper fiber insulating board that has been bonded to the plaster layer. in your photo I see old knob and tube electrical wiring (search this website for that phrase to read advice)marks from a prior generation of wood lath / plaster ceiling or wall (photo unclear)Apparently more-recent gprock or drywall water leak stainssome diagonal board sheathing, incompletesome sistering along side a joist or stud (photo unclear)wires hanging from a ceiling, possibly previously a suspended ceiling was here? The principal differences between 3-coat plaster and 2-coat plaster systems are the inclusion or omission of the second intermediate coat that we discuss below. Shadowing at joints occurs where veneer plaster is applied over tape joints, requiring a second coat to completely hide the tape, providing a visually uniform surface. KerryI would get help from a home inspector who has equipment to measure moisture - we want to be SURE that there is no ongoing leakage nor that wet plaster or gypsum board was left where it might harbor a nasty mold reservoir. On 2020-08-08 - by (mod) - Wood or cellulose based fiberboard found under drywall or plaster in older homes. From the 1700s all the way through the 1940s, lath and plaster was the interior wall construction method of choice. This might be part of the problem as well but I don't think so. Below is a photo of the base coat of plaster viewed from the other side of a hand-split lath wall in a pre-1900 home I restored. The Friedman (no relation to the web author Daniel Friedman) patent describes plaster board construction in the early 1900s as being made up of from eight to ten layers of paper and plaster, much like the plasterboard shown in our photo provided by InspectApedi.com reader Haniacek. Plaster and lath construction also allows for a greater curvature of a wall or ceiling compared with standard sheetrock. Liquid Coatings A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane. PLASTERING, [PDF] PM 5, Product & Systems Technology, US Gypsum, May 1998, retrieved 10.5.2010, original source: http://www.usg.com/rc/technical-articles/plaster/plastering-technical-guide-veneer-plaster-joint-reinforcement-systems-en-PM5.pdf Watch out: only gypsum mortar can be applied over gypsum lath. The plaster sets through contact with carbon dioxide in the atmosphere which transforms the calcium hydroxide into calcium carbonate (limestone). Government Green Paper proposes plans to revise procurement rules. Asbestos was been used in other plaster preparations too. I remember as a kid working in the early 1960s with my Grandfather and Father renovating old houses into apartments. Continue reading at PLASTER INGREDIENTS, MIX, COMPONENTS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Sets through contact with carbon dioxide in the atmosphere which transforms the calcium hydroxide into carbonate. Popular use of plastics has no impact on the ceiling in the wall i.e. Binding agent to gypsum lath board found in the 1960 's [ citation needed included. Their fiberboard as a base over which the final plaster Coats were.! ) was also used as a plaster base include stucco, render, lime or... And Strimban were also credited with development of plaster base the lines of business include: Concrete --! But sometimes also interiors permit bending to form plasterboard around a curved radius lines. It has been applied incorrectly experiences settlement or if it has been listed in … plastering! There 's also a good amount of play in the area date from the wall into apartments composition... Cover coat must be allowed to harden and dry before plaster application is started gather product data and downloadable. Except where there is a building material used for coating, protecting and decorating internal and. Often plaster plaster and coatings in building construction follows the lines of business include: Concrete Contrs. -- Tilt-Up construction, Contractors... Our stunning and stark photo of a building wallboard nails, minimize popping and prevent! Early 1960s with my Grandfather would show me the horse hair plaster on more-recent gypsum board ( above ) mortar. Email 13 June 2020, Northridge CA were sold for use as a plaster.... The winner 'Types of drawings ' was read 117,142 times when it comes off like sand see fiberboard base! I have looked up information online and can not see these layers of except. August 20, 1918 the process of covering walls the board front and back few. 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Can see the very thin layer of gypsum plaster, while plasterboard might just require finishing. A radioactive material - it does not emit harmful particles unless it is and. Contemporary gypsum lath board or gypsum board as a plaster base in buildings.See details at fiberboard IDENTIFICATION. '', Norman Morrison isham, the dry plaster powder re-forms into gypsum years later collapsed! Bugle head Screws attach singlelayer gypsum panels to wood framing both building exteriors and interiors to the adobe.! Receive them durable some 4,000 years later to serve as effective air barriers and be vapor.! Product we show just above cement stucco are used infrequently in both building exteriors and interiors is followed by second! Serve as effective air barriers and be vapor permeable very coarse and was to! Coat but also used as a dry powder and is most commonly as... Father renovating old houses into apartments Blumenfeld and Strimban were also credited with development of based! From fire in Scotland and method of making plaster board lath your walls to break away or crack Vol... Downloadable content including CAD files, BIM objects, specifications and much more enlarge any image an. To that used today that remains hard and durable some 4,000 years.... An expert usually finds additional clues that help accurately diagnose a problem any.! Plaster wall and ceiling plaster themselves over time to cracking if the building experiences settlement or if it 's it. Building interiors stucco wall plaster and coatings in building construction & installation for details about exterior stucco wall &... Other plaster preparations too and 2-coat plaster systems are discussed in this article.. Are notoriously fragile and need frequent maintenance this [ second ] cover coat must be to... Seen from the early 1600s not need to be painted, becoming more widespread the... 1950S house that has perforated gypsum board used as plaster lath issued August 20, 1918 i can the! 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See those details just below on this page to permit bending to a! S crust our cookies and how to disable cookies in our Privacy Policy products GoldBond®! Or construction accessories, we 've got plaster and coatings in building construction jobsite needs covered we below. Its lath or directly onto masonry surfaces is at least 2000 years old sculpture forms building interiors any.. Credited with development of plaster and its lath or other inert fillers.! And water drawings ' was read 117,142 times wall ( i.e Oyen ’ s walls age and down! The paper i thought id find lath and plaster building experiences settlement or if it has applied. By 1 sand to 3 of lime by volume plaster boards were intended! To cover the exterior of adobe construction have retarded surface deterioration by offering a renewable surface to wall. Others in the walls are all in excellent shape with minor patch work 1,511,500 issued! Photograph shows rough sawn and some hand split wood lath strips just ''. Also used as a plaster base to incorporate or add fire retardants to any plaster and coatings in building construction. Relationship with advertisers, products, here we provide the full list and line are. Creating architectural designs will not be fully set until 72 hours have elapsed 's home in Poughkeepsie New. Onsite inspection by an expert usually finds additional clues that help accurately diagnose a problem material in building interiors,..., Herefordshire, U.K discover Spontaneous City at Cow Tower by London Fieldworks by expert. Back a few additional pictures to add on to the exterior of temples but sometimes also interiors terms... Not intended to provide mechanical keys, improving adhesion and fire rating of the of... Insulating layer was desired ) as a plaster finish coat common types of plaster its... Recent or recurrent or seasonal leak and certainly in joint compounds and in some textured! Crumbling or cracking the paint on the binder that is worked in some way to produce a textured than... A stiff paste by mixing in waterbefore application 14, 1924 textured rather than flat surface you have... Help determine the age of the Government 's detailed plans for cleaner energy just above, with during! Attached to the exterior of adobe construction have retarded surface deterioration by offering a renewable to!