DIY: How To Build A Man Cave / She Shed / Workshop – Part 5 – Installing The Deck

I install the deck using 18mm thick structural OSB 2440 x 1220mm (8 x 4ft). Cost about £22.00 each. I screw these into place using 65mm double countersunk deck screws which do NOT require pilot holes: https://www.screwfix.com/p/timbadeck-double-countersunk-carbon-steel-decking-screws-4-5-x-65mm-500-pack/34251
DIY: How To Build A Man Cave / She Shed / Workshop – Part 4 – Making & Installing The Subframe

I construct the subframe using C24 pressure treated construction timber 150 x 50mm and the following screws: TIMBASCREW FLANGE TIMBER SCREWS GOLD 6.7 X 150MM 50 PACK: https://www.screwfix.com/p/timbascrew-flange-timber-screws-gold-6-7-x-150mm-50-pack/4613j TURBOGOLD PZ DOUBLE-COUNTERSUNK MULTIPURPOSE SCREWS 5 X 100MM 1000 PACK: https://www.screwfix.com/p/turbogold-pz-double-countersunk-multipurpose-screws-5-x-100mm-1000-pack/2577f