![lath and plaster wall section lath and plaster wall section](https://empire-s3-production.bobvila.com/articles/wp-content/uploads/2019/02/iStock-121038541-lath-and-plaster.jpg)
The plaster should then be left until set hard but protected from heat and draughts. Working to a layer of 10mm thick, push the plaster into and across the pre-wet laths at a 45 degree angle to the laths.The plaster should be left to steady up before being scratched in a diamond pattern ensuring the scratches are not running along the laths. If the plaster is made on site, the HORSE HAIR needs to be evenly distributed throughout the mortar. However if an NHL is specified then NHL2 should be used. Lime putty based plasters are more flexible and therefore more suitable for lath work. Our blend of sharp and soft sands, chalk lime putty and horse hair in our Haired MEDIUM STUFF is ideal for the first coat onto laths. Spray a clean cold water mist on to the laths prior to applying the scratch coat. Stainless steel ring shank nails should be used to fix the laths. Riven laths compared to sawn laths are the strongest and should always be used on ceilings. These elements should be removed before damaged laths are repaired. The LATHS must be free from dirt, grease and vegetation. Each lath is spaced approximately 1/4inch (thickness of the average little finger) away from the next leaving enough space for the mortar to push through and hook over the lath to form a key laths. A lath is a narrow strip of wood approximately 2 inches wide which is nailed horizontally to each stud in the frame. Lath and lime plaster is a building technique used mainly for interior walls in period buildings. Laths, Woodwool Boards, Bricks, Hessian & Mesh.