The basic timber framework follows the method set out by John Aherne (of Madder Valley fame) in his book "Miniature Landscape Modelling, originally published c.1950 - see photo. The surface is half-inch chipboard. I've used this method for 40 years and it's relatively easy as no carpentry skills are required The exception is a removable section at one end where in order to accomodate a Metcalfe bridge, I used thin ply for the track bed - less than ideal but it works - see picture. This section has been wired with multi-pin connectors at each end and can, if required, be removed to enable access to a radiator behind. It's located using the time-honoured method of door hinges with removable pins, one at each end. All surfaces were given a coat of neutral grey paint before track-laying commenced. The completed baseboards are free-standing and do not touch the room wall at any point.