![]() Soak new lath before fixing to ensure that they tighten when they dry. This will avoid introducing a weak stress line in the finished lath and plaster. It is important you stagger the lath on installation so that the ends of the laths are not all in a straight line. Regency Lime Plaster 2 kg per m² (optional ultra-fine top coat) (Mike Wye supplies both sawn and riven laths. Many of these developments were out of keeping with the properties for which they were specified but also introduced their own problems due to their relative lack of breathability (in the case of cement). Lime plasters stick less easily to EML and there was also a move towards using harder cement-based plasters and gypsum. Space gaps between lath by approximately ¼” (use a lath on its edge to set the spacing).ĭuring the 20th century, expanded metal lath (EML) began to supersede timber lath in new work and often in renovation work as well, being cheaper and quicker to fix. Sawn laths are generally a little narrower at around an inch (25 mm). This is much more uniform in nature and has a smoother surface giving less key to the mortar – hence the key formed by the plaster squeezed between the lath is of even greater importance. Backing coats of lime plaster should contain animal hair to help the plaster keys stay in place whilst curing occurs.īy the end of the 19th century, sawn lath produced by machinery was also much in evidence. Laths vary between 1¼” to 1½” (31 – 37 mm) in width and are around ¼” thick.įorming the keys is achieved by squeezing the lime plaster between the lath when trowelling. They are generally irregular in shape, width and thickness with a coarse surface that provides extra key. ![]() These are laths that have been split along the grain of the wood by hand. ![]() Lath and plaster work traditionally used riven oak or riven chestnut lath. ![]()
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