Photo Three - The individual tiles are small coloured beads from HAMA, each bead is cut in half, length ways and then glued onto the roof profile with undiluted PVA glue, starting with the main diagonals and then building the rest of the roof from the bottom up.
Photo Four - The roof about halfway through. Please note that the beads I am using are second-hand and have already been used to produce a plain resin, roof section 'blank', rather than throw them away after the master was taken out of the rubber, I am re-using the cut beads. In terms of time spent - there is not a great deal of difference between re-using old and cutting new beads as the old beads still needed to be cleaned up prior to use.
Photo Eight - After a second coat of PVA glue is dry, I cover the whole roof with a mixture of ready-mixed filler (Polyfila), some PVA glue and a sprinkling of fine sand. I use an old brush and a stippling action to add texture to the otherwise plain plastic beads.
Photo Ten - The next step is to use DAS modelling clay to fill any gaps and add some 'mortar' to the tiles and the roof top.
Photo Eleven - The DAS added. I use a spear-headed dental tool to push the DAS into the small gaps and later smooth the joins with a paintbrush dipped in water.
Photo Twelve - As above.