1) Applies plasterboard 2) Backers for plasterwork 3) Backing for plasterwork 4) Backing strips 5) Certain trellis components 6) Foundation for some roofing 7) Groundwork for plastering 8) Lattice components 9) Lattice strips 10) Latticework strips 11) Narrow strips of wood 12) Plaster backing strips Found on https://www.crosswordclues.com/clue/laths
Cleft laths of oak were traditionally used as fill for panels between timber framed buildings and ceilings as well as a range of other uses Laths are also cleft from chestnut Found on http://www.coppice-products.co.uk/Glossary.htm