24x8 Apex Summerhouse 18ft combi hot-tub 6ft area

19mm t&g pressure treated tanalised cladding with 19mm tanalised cladding partition , 13mm klin dreid t&g cladding roof ,3"x2"cls  smooth planed tanalised framework,(61x38)  3"x2"cls roof joists & roof  trusses  1" thick tanalised planking floor sitting on 3"x2"cls tanalised floor bearers, Heavy duty 40 kg  felt.  All 4mm toughened safety glass