1. LVL AS A CONSTRUCTION MATERIAL Figure 1.51. Edge profile alternatives for LVL components. Figure 1.52. Edge profiled LVL-C panels. 1.7.4 Edge profiling Edges of LVL panels can be profiled with easing, half lap, tongue & groove (T&G) or groove & groove (G&G) profiles. Long edges can be profiled on a milling cutter line, and profiling of all edges can be done on a 5-axis CNC machine. 1.7.5 Surface treatments LVL manufacturers provide different kind of surface treatments for their products: • Moisture protection provides improved resistance against temporary weather exposure during storage, transport and on the building site. • Treatment against mould reduces the risk of mould growth and blue stain and is recommended for use in service class 2 conditions, e.g. in roof structures of attics and shelters. • Fire retardant treatments improve the reaction to fire classification of LVL members from D to C or B class, enabling a wider range of applications. Except for certain paints, fire retardant treatments can be used only in service class 1 conditions. • LVL surface can be painted with fully pigmented non-transparent paints or stained with translucent stain or varnish. Metsä Wood 36 LVL Handbook Europe
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