Its your call Simon, we prefer to go straight though but many of our DIY customers put in a seperation strip. A 15mm gap should be left under the arch for expansion if you go with this way of doing it. The strip can be of chamferred hardwood simply glued ( Gripfil adhesive is the best, see our adhesives used at home project at www.diydoctor.org.uk/projects.htm ) to one side of the floor. this will still allow movement under the strip. It takes a bit of experience and some considerable carpentry skills to be able to complete a floor and keep all cuts and expansion joints neat but we think its worth getting some same size timber to practice on as a strip in the middle of a floor (in our opinion) looks untidy,.
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