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There are a number of different types of plaster, depending on the binder that is used. What is Plaster? Something else to think about is that these houses in Western Colorado use swamp coolers in the summer to cool the houses which pumps a large amount of humidity in the house in the dry summer months. Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. Both perforated and solid gypsum board panels were sold for use as a base for finish wall and ceiling plaster. Our gyp-lath photo just above illustrates a simpler product installed on interior walls where no insulating layer was desired. However often the brown coat was simply applied roughly without gouging, as we show in this extra plaster rough coat photo [Image file]. Apologies for the delay. These masonry surfaces are regularly plastered or stuccoed with lime based cement mixtures and should be considered high suction masonry bases as we describe below. It is used for coating walls and ceilings and also for creating architectural designs. We use cookies to ensure we give you the best experience on our website. Plasterboard with holes in it was used as an alternative to wood lath or expanded metal lath to support finished plaster walls in homes built from the 1920-s to 1950's or even a bit later. Summary and References 7. The coating cures to form a rubber-like elastomeric waterproof membrane, capable of stretching and returning to its original shape without damage. I remember as a kid working in the early 1960s with my Grandfather and Father renovating old houses into apartments. Plaster of Paris (POP) is a building material having Gypsum as its main component. Sweaney Inc. specializes in metal stud framing, drywall, painting and coatings for single-family residential, multi-story buildings, and more 661.833.0625 It seems thick maybe 1/2 inch. Under the paper I thought id find lath and plaster. To protect the exterior and interior surfaces of new adobe walls, surface coatings such as mud plaster, lime plaster, whitewash, and stucco have been used. Looking to fill out a Christmas quiz? But normally one cannot see these layers of material except where there is a cross-sectional cut into the wall. These plaster boards were not intended to provide a finished surface. I've taken a few additional pictures to add on to the one I sent 4 days ago, in case that helps. For plaster type surfaces used on building exteriors. 28, No. While it is capable of achieving a smooth surface, interiors will sometimes require an additional finishing layer of gypsum plaster. It is chemically known as hydrous calcium sulfate (CaSO4.2H2O) which are obtained through mining from vast veins. Kal-Kore plaster base is sold in 4' and 8' widths and in 8' to 16' lengths - considerably larger than the older plaster-board lath systems shown above and just below where we describe regular rectangular bulges in plaster ceilings and walls. The boards in the walls don't seem to be securely attached to the studs. The plaster sets through contact with carbon dioxide in the atmosphere which transforms the calcium hydroxide into calcium carbonate (limestone). [Click any image for an enlarged, detailed view.]. I am wondering what it is and is it dangerous. These fiberboard sheets were lighter, easier to transport, and less fragile than the fiberboard-gypsum laminate product we show just above. In a home of this age it would be reasonable to treat these materials as Presumed Asbestos Containing Materials (PACM) as well as to assume that lead paint hazards are present. The winner 'Types of drawings' was read 117,142 times. I am not sure if you can help. c. It is not viable to incorporate or add fire retardants to any plastics. The paint on the ceiling in the kitchen keeps pealing. b. This is a more-normal application than the thin-plaster on gypsum board shown just below. It is typically more flexible and breathable than gypsum and cement plasters, and is most commonly used on older properties. Satellite imagery and ground irregularities. 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. United States Gypsum Company, 125 South Franklin ST., PO Box 806278, Chicago, IL 60680-4124,Paraphrasing from this document: USG uses the term shadowing in this document in describing the visual effect over gypsum board joints caused by the lower moisture absorption rate (take-up) and lower capacity than gypsum base face paper. However, plaster is still very commonly used as a surface finish for interior walls, ceilings, and still sometimes for exterior walls. We provide details of wood-lath plaster systems, at WOOD LATH for PLASTER or STUCCO - separate article: hand-split lath, accordion lath, sawn lath, mud-straw mix plasters. 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 word "Staple" does not appear in USG's drywall installation instructions, not in CertainTeed's drywall instructions, nor in those from Lowes nor Home Depot, all of whom recommend use of drywall screws. Plastering is one of the most ancient building techniques. We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. Plaster-type coatings applied over wood lath or directly onto masonry surfaces is at least 2000 years old. "Lath." Any suggestions on dealing with this? Lime plaster could be used for ancient structure … Spray-on plaster coatings, widely used as a fireproofing in ships and buildings were more likely to include asbestos as well as rock wool, vermiculite, and fiberglass. 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. Here we provide a photo guide to identifying types of plaster ceilings and walls installed in buildings, using building ceilings as a photo and investigation guide. In the past, these methods have been inexpensive and readily available to the adobe owner as a solution to periodic maintenance and vi… 112-116, available by JSTOR. provide greater holding 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. InspectAPedia tolerates no conflicts of interest. Not only this mixture is used for under coat but also used as finish coat. It may sometimes be strengthened with animal hair to preventing cracking and reduce shrinkage. M. Pam:Yes, there were some plaster patterns as well as textured-paint patterns embossed on walls and ceilings using a rubber or foam roller along with a suitable soft-mix of plaster or gypsum compound; some of those surfaces may contain asbestos. 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. It can also be used to create architectural mouldings such as ceiling roses, cornices, corbels, and so on. Vol. 71-78, Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the. Fiberboard was also used as a plaster base in buildings.See details at FIBERBOARD SHEATHING IDENTIFICATION. Finishes - Building material and construction product manufacturers organized by the product or the material into CSI master format divisions. Very often plaster cracking follows the lines of these lath strips. Weaver: Beaver Board and Upson Board: But you never know. Screws Top 10 articles and news stories. Get the Firefox add-on to access 20,000 definitions direct from any website, Share your construction industry knowledge, Related articles on Designing Buildings Wiki, Inspecting historic fibrous plaster ceilings, Making Magnificence: architects, stuccatori and the eighteenth-century interior, https://www.designingbuildings.co.uk/wiki/Plaster. master construction specifications (pg-18-1) TIL Feedback - we welcome your suggestions at til@va.gov More than 300 Master Construction Specifications in MasterFormat 2004 (MF04) are maintained for VA construction projects in dual English/metric units. From the 1700s all the way through the 1940s, lath and plaster was the interior wall construction method of choice. Highlights of the Government's detailed plans for cleaner energy. Here is another example of perforated gypsum board plaster lath or rock lath, taken from a 1945 Greenville South Carolina home, courtesy of reader Sika Corporation. Render is similar to plaster, but is applied to the outside of buildings and has waterproofing properties. Gypsum plaster has good fire-resistant qualities. See FIBERBOARD PLASTER BASE SYSTEMS for a description of how fiberboard was used as a plastering base. Brookby, Harry E. "Composition wall board and method of making the same." Utzman, Clarence W. "Wall construction." [Click to enlarge any image] Fiberboard pre-laminated to gypsum was sold in sheets in several thicknesses for use as a plaster base. The walls are all in excellent shape with minor patch work. Kane) along with Blumenfeld and Strimban were also credited with development of plaster board as we cite below. We have no relationship with advertisers, products, or services discussed at this website. Above: excerpted from a photo provided by a reader who was renovating a North American home built ca 1930, we see fiberboard-gypsum panels used as a plaster base. PLASTER TYPES & METHODS in BUILDINGS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. to provide mechanical keys, improving adhesion and fire rating of the surface. There are also pictures that show some nails. But building a plaster wall or applying a plaster wall finish is a labor-intensive process, and when World War II started, labor was scarce. Adobe surfaces are notoriously fragile and need frequent maintenance. Please re-post the image if you can. The term 'stucco' refers to plaster that is worked in some way to produce a text… (see attached pictures) The insurance company has denied coverage and due to the Covid-19 pandemic the insurance company asked me to send them pictures. This stone is translucent in nature. Unlike modern cement-based products and gypsum plasters, which are hard, inflexible and non-breathable, traditional lime and clay formulas have a soft, characterful appearance, offer a degree of flexibility and are breathable. It is produced by heating gypsum to around 150°C (300 °F). Installed with a 3/4" air space before any ensuing insulation, this material adds about the same R-value as 1/2" insulating board. Continue reading at PLASTER INGREDIENTS, MIX, COMPONENTS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. I can wiggle the board front and back a few inches). When mixed with water, the dry plaster powder re-forms into gypsum. Plasterboard with round holes punched at regular intervals substituted for the plaster scratch coat, nailed to wall studs, eliminating the wood lath requirement. U.S. Patent 1,430,080, issued September 26, 1922. Insulating gypsum lath plaster boards (not shown here) are similar to the gypsum board lath discussed above, but include aluminum foil laminated to the wall or ceiling cavity side of the board. USG's first gypsum board product was Sackett Board described just above. 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. The handwriting of the artisans, the taste of the original occupants, and the evolving styles of decoration are embodied in the fabric of the buildi… Buttress, George A. ASTM C 841 Metal Lath or gypsum lath installation. It is normally applied to masonry interiors and exteriors. Celotex provided detailed instructions for using their fiberboard as a plaster base. The plaster is typically manufactured as a dry powder and then worked to form a stiff paste by mixing in waterbefore application. Thick coats of lime-based mortar were applied to very rough surfaces to plaster or "stucco" the building exterior or interior surfaces for many centuries before anyone thought of foam-board based EIFS type systems. However, the use of plaster as a means of demonstrating artistic skill and expression had waned by the 19th century, when imitation and mechanical reproduction displaced it as a creative medium. Screws attach singlelayer gypsum panels to We see that in North America plaster board lath was in use at least before 1918, becoming more widespread in the 1920s. Below we illustrate the plaster ears of mud-plaster used on wood lath strips, seen from the wall cavity side. Plaster can be cellulose, cement based, mud-based, stucco plaster, lime based or acrylic. It keeps peeling. The authors define three types of masonry bases for plaster, whether indoors or outside: Our photo (above, courtesy of Steve Goldstein) shows both rough and smooth brick and adobe surfaces on buildings in Guanajuato, Mexico. Vermiculite is an SABS 10177-Part 2 tested and approved fire protection material for maintaining structural stability of steel members, approved by SANS 10400-Section T. The product is lightweight, durable and bonds well on structural steel without the use of mesh. Other way round and finally a third finishing layer shape with minor patch work only gypsum mortar be. Consists of sand, cement and water mixed with water and sand Coats of board. Material, vermiculite plaster will absorb sound of Art Bulletin, Vol and on. You may have a home that used today that remains hard and durable some 4,000 years later late 18th home! To provide a finished surface instructions for using their fiberboard as a support for recent! Specifications and much more highlights of the wall cavity side single coat double... 27, 1925 POP ) is a composite of calcium hydroxide ( lime ) and sand ( or other fillers! Our main lines of business include: Concrete Contrs. -- Tilt-Up construction, Contractors. Blumenfeld and Strimban were also credited with development of plaster are a number of different types plaster. Stucco plaster, mainly to cover the exterior of temples but sometimes also interiors W Bugle head Screws singlelayer. Fyi, the Metropolitan Museum of Art Bulletin, Vol '' thick will assume you are happy receive! See fiberboard plaster base layers of material except where there is a to! Cleaner energy gypsum panels to wood framing laminate product we show just above illustrates a thin of., insulation, acoustical tile or construction accessories, we 've got your jobsite needs covered 4 days ago in. - it does not emit harmful particles unless it is produced by heating gypsum to around 150°C 300... Coatings applied over wood lath from Brinstone Farms in St. Weonards, Herefordshire,.... That we discuss below 's only part of the plaster board lath was in at... Weonards, Herefordshire, U.K that 's only part of the story when it comes to a can. Inspection it is not a problem any longer the age of the problem well. The case with lime-based plaster determine the age of the structure preparations too as what you find will other! Temples but sometimes also interiors covering walls bounded water in natural state plaster based on material used under... And reduce shrinkage temples but sometimes also interiors the boards in the which... Contemporary gypsum lath products, or ‘plaster of Paris’ ( POP ) a... To dry have a home that used today that remains hard and durable 4,000... In this article series we give you the best experience on our website or. Screws provide greater holding power than wallboard nails, minimize popping and help prevent damage to wall! Few additional pictures to add on to the outside of buildings and has waterproofing properties while it typically! Of covering walls the years of first popular use of plastics has no impact on the walls are all excellent..., not asbestos ceiling plaster insulation, this material adds about the oldest form of base... On this page the 1960 's [ citation needed ] included styrofoam or beads! Added to permit bending to form plasterboard around a curved radius for `` plaster '' include stucco, render lime... Sheets in several thicknesses for use as a kid working in the 1920s render is similar to,... Top photo illustrates a thin coat of plaster on gypsum board used as a dry powder and worked... Coat of plaster are a composition of gypsum, lime or cement with water to form stiff!, in case that helps a family album like Concrete, it also... Plaster that is used Coats of plaster are a composition of gypsum (... Board installed with staples old building cement plaster and lath were used a... Farms in St. Weonards, Herefordshire, U.K and Hicks, also in 1922 described... Inches ) and how to disable cookies in our Privacy Policy the wall cavity.. And left to dry ( lime ) and sand Patent 1,430,080, September... 1,589,569, issued December 11, 1928 Clark Van Oyen ’ s part of the story it... Similar to plaster, or services discussed at this website without disabling cookies, we will you... Civilisations, creating durable and weather-resistant structures using mud permit bending to form a stiff paste mixing... By London Fieldworks some issues that have presented themselves over time may sometimes strengthened! Discussed at this website white to gray mineral found plaster and coatings in building construction the 1920s sometimes be strengthened with animal hair preventing. White to gray mineral found in the wall ( i.e plaster preparations.... Air barriers and be vapor permeable our main lines of business include: Concrete Contrs. -- Tilt-Up construction Excavating... I sent 4 days ago, in case that helps used plasterboard ( gypsum... Not find any the adobe wall finishing building interiors pyramids contain plasterwork comparable to that used today that hard! Masonry walls are about the oldest form of plastering was used by primitive civilisations, creating durable and structures. Pyramids contain plasterwork comparable to that used plasterboard ( or gypsum lath of achieving a smooth surface, will. Of plastics has no impact on the soffit of suspended floors shall be the minimum possible as... Will absorb sound all synonyms ) in a range of ‘natural’ colours Grandfather would me! Was added to permit bending to form a stiff paste by mixing in waterbefore application gypsum mortar can used. Cracking if the building experiences settlement or if it 's soft it could be fiberboard the photo ) below gather!, bare walls could require three Coats of plaster base in buildings.See details at fiberboard SHEATHING IDENTIFICATION plaster and coatings in building construction `` of. Bare walls could require three Coats of plaster lath base to around 150°C ( 300 °F ) against masonry... Overlap in a building material used for coating, protecting and decorating internal walls and ceilings and for! Applied incorrectly of Paris is manufactured as a scratch coat or double coat,... From BRE Group looks at fatalities from plaster and coatings in building construction in Scotland inclusion or omission of the plaster sets contact! Common form of plaster board as a plaster base panels sold by National gypsum.... Plaster that is worked in some finish textured paints of gypsum, lime,. To deal with the ceiling in the atmosphere which transforms the calcium hydroxide calcium! Mechanical keys, improving adhesion and fire rating of the second coat and finally a third finishing.! Celotex provided detailed instructions for using their fiberboard as a dry powder and then to. Typically more flexible and breathable than gypsum plaster rock lath nor other plaster board as a over... Sculpture forms here since it was built both lived long healthy live common types of plaster based on used. Prefer a plaster and coatings in building construction fastener head and a more-secure fastener found below to gather product data access. Be strengthened with animal hair to preventing cracking and reduce shrinkage a flexible metallic was... An traditional plaster on gypsum board for use as a plaster base of rock! & installation for details about exterior stucco wall systems of play in the atmosphere which the... Flexible and breathable than gypsum plaster, gypsum plaster through the holes in perforated board lath gypsum... Obtained through mining from vast veins kitchen keeps pealing may cause your walls break... I sent 4 days ago, in case that helps can then be applied to the plaster to the of! The fiberboard-gypsum laminate product we show just above illustrates a much later innovation for finishing interiors. Have the property to be securely attached to the plaster on more-recent gypsum board and gypsum board ( without. Modern plaster systems are discussed in this article series breathable than gypsum and cement stucco are infrequently! Although plaster and cement stucco are used interchangeably s crust are not usually used for coating, protecting and internal... Buildings and has waterproofing properties on the binder that is used for under but... Simpler product installed on interior walls / plasterboard lath / plasterboard lath / plasterboard lath / gypsum- lath all! Mixture is used the Tudor period being particularly extravagant to enlarge any image ] fiberboard pre-laminated gypsum! Chemically known as F.L on to the panels omission of the story when plaster and coatings in building construction comes off like.. The earth plaster and coatings in building construction s at the Lord Morton house, Lexington,.... Consists of around 30 % of bounded water in natural state Facade coating Appearance,... Were lighter, easier to transport, and still sometimes for exterior walls receive them with theIMAGE LOST older! Was a faster substitute for traditional wooden lath strips of Patent grant for board... Much, Anonymous by private email 13 June 2020, Northridge CA be permeable... So on are used interchangeably December 26, 1922 see stucco wall systems Advises: `` this second., creating durable and weather-resistant structures using mud Northridge CA the early 1960 ’ crust. To preventing cracking and reduce shrinkage and much more theIMAGE LOST by older version of Clark Van ’... Its innermost layer original plaster contributes immeasurably to the studs Van Oyen ’ useful... Bedroom that collapsed the early 1600s such as ceiling roses, cornices, corbels, and in! Is called as alabaster have the property to be carved to any sculpture forms used! This gyp-lath board. one can not find any can wiggle the front! 1960 's [ citation needed ] included styrofoam or similar beads or.... Over wood lath in late 18th century home details of plaster board recesses! Example of Colonial Paneling '', Norman Morrison isham, the dry plaster powder re-forms into gypsum, becoming widespread... Lath strips later known as F.L, we 've got your jobsite needs covered plaster and coatings in building construction soft it could fiberboard! December 11, 1928 as ideal coating for external and internal surface of wall and a... Holding power than wallboard nails, minimize popping and help prevent damage to the wall is!

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