I’m working with pvc trim for the first time and need to rout a cove detail in it. Any suggestions as to router speed or any warnings?
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I've found it works pretty much the same as pine; just use a sharp bit and don't try to cut too fast or too much at one time. I've usually used my P-C 1-1/2 hp router at whatever speed it runs at ( 20k plus)
Beware, all PVC trim is not the same. I have found that different brands are manufactured at least two different ways. My understanding (and I am not a PVC expert) is that some products are extruded as large sheets, then ripped by the manufacturer and sold in various dimensions. The other method extrudes the trim boards individually (these usually have a slick finish and more rounded edges). It has been my experience that the individually extruded products (e.g. Permatrim brand) have numerous, small, interior voids that look crappy when routed (or ripped). Products that are extruded as sheets and then ripped (e.g. AZEK) are solid thoughout and is a much better product for routed edges. The stuff pretty much routs about like pine but the chips are finer and stick to everything. Also, any joints to be glued need to be dead flat and perfect for the glue to stick. Good luck.