When was plasterboard invented

Such efforts have in most instances centered about the character of the lathing employed, while in another instance a heat-expansive material has been added to the plaster to compensate for heatinduced shrinkage of the plaster in the event of fire, as described in the aforesaid Croce patent. It is another important object of the present invention to enable high-fire retardant characteristics to be attained in plaster compositions and products in an improved and simplified manher, and related object is to attain this result with the minimum of additives so as to thereby enble the maximum ratio of plaster to be used.

Such disadvantages are eliminated under the present invention by affording a gypsum plaster composition which utilizes drawn textile glass fibers as a bodying and strengthening component in such a way and with such efiiciency as to be economically practical and in such a way that the mixing and forming, shaping and drying operations in respect to the mixed plaster or slurry may be readily and easily performed.

At the outset it should be noted that suggestions have heretofore been made concerning the use of wool, and separation of individual fibers from the mass is quite difilcult because of the curled and interlaced or matter relationship of the fibers in the mass.

Such separation of individual fibers from the mass is also rendered difficult by reason of the relatively low physical strength characteristics of the blown fibers which bend quite easily and tend either to retain their bent form or to break at the bend. The tests included in Table I show that as co'mpared with conventional plaster wallboard as represented by board A, boards B, C and D attain a marked improvement in respect to fire resistance, while boards C and D attain satisfactory characteristics in the other tests.

The whipping test is one that is quite important from a practical standpoint in that it simulates a condition that is often encountered in the handling or installation of plaster wallboard.

Thus in this test the opposite ends of 4 foot by 8 foot sheet of plaster board are grasped by two men and the board is moved up and down so as to cause the central portion of the board to bow downwardly and then upwardly with what might be termed a whipping action. In such handling, any weakness inthe board is liable to cause breakage, and by counting the number of whips or up and down movements necessary to break such a board, a munerical index is afforded which is representative of the strength characteristics of the board.

The shock test was made by supporting a piece of board one foot wide and four feet long on three feet centers, and in this instance the grain of the paper extended transversely of the width of the sample. A loading board was then placed in the center of the span and a sling arrangement was attached to the loading board.

A weight of grams was then attached to the sling by means of a rope. This weight was raised up one inch and then dropped and this dropping action was repeated through progressively larger distances, the increase between drops being one inchin each instance, and this was continued until failure or breakage of the test board.

The results of this test were indicated by the number of inches of the final dropping movement of such weight. In the furnace test the board samples were :nailed on 6-inch centers to the lower faces of joists spaced on inch centers and a 4 lb.

The board as thus supported formed what may be termed the upper wall of the furnace and the temperature developed in the furnace was substantially to degrees F. The nailing test is performed by driving 5 penny cement coated wallboard nails into a wallboard near an open or out edge, and observing whether and to what extent the plaster core splits out or breaks.

When was drywall first used in homes? The Industrial Revolution saw a marked increase in asbestos production and use in North America, with the first commercial asbestos mine opening in in Quebec. The material was initially sold as small forms of fireproof tiles before it became available as a multi-layer gypsum and paper sheets. Chinese paper was a mixture of bark and hemp. Papermaking spread to Japan c. Drywall is a construction material made from thin panels of gypsum board.

It is used to construct walls and ceilings in residential and commercial structures. It's name comes from the fact that water is not required to use it for wall and ceiling construction. What is Gypsum Board? In Theophrastus, On Stones, from around BC, there is a reference to a material that is thought to be asbestos. Theophrastus was successor to Aristotle in the Peripatetic Before drywall was invented, what were houses made of?

Now the fun part - the people mixed up a think mortar and plaster the stuff onto the slats. Within a decade later, drywall took on the form of a single layer of compressed gypsum in between sheets of paper. It is used to make interior walls and ceilings. The mission of the Gypsum Association GA , a not-for-profit trade association founded in , is to promote the use of gypsum while advancing the development, growth, and general welfare of the gypsum industry in the United States and Canada on behalf of its member companies.

At this thickness, it is much more rigid, and there is superior fire and impact resistance. Regular plasterboard or wallboard is the best first choice when it comes to ceilings. Andrew Gabriel Contact options for registered users. Reply to Andrew Gabriel. Reply to nightjar. CJF Contact options for registered users. Reply to CJF. Reply to whisky-dave. Andy Dingley Contact options for registered users. Reply to Andy Dingley. In the second half of the decade, these interests were extended to the Low Countries and Germany.

The 50s also saw the first innovation in Plasterboard with the introduction of the Paramount dry partition in In British Gypsum sets up the first-ever training centre for the interiors industry in Erith, Kent. In the past 50 years, British Gypsum has delivered over , training days and has both free and paid for courses available for installers, merchants, clients, architects and main contractors. In , the acoustic laboratories at East Leake were officially opened.

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