▁marked , ▁making ▁it ▁impossible ▁to ▁make ▁a ▁mistake ▁during ▁ere ction , ▁and ▁that ▁every ▁part ▁of ▁framework ▁was ▁mort iced ▁and ▁ten oned ▁where ▁necessary . ▁ ▁The ▁ 1 9 5 4 ▁Q PS ▁advert is ement ▁went ▁on ▁to ▁add ▁that ▁since ▁Co or an ▁homes ▁had ▁been ▁introduced ▁over ▁ 8 0 0 ▁had ▁been ▁supplied . ▁Spec ifications ▁on ▁the ▁Co or an ▁homes ▁noted ▁that ▁the ▁wall ▁stud s ▁were ▁ten oned ▁to ▁fit ▁into ▁the ▁mort iced ▁top ▁and ▁bottom ▁pl ates ▁and ▁interior ▁sheet ing ▁could ▁be ▁either ▁four ▁and ▁a ▁half ▁in ch ▁tongue ▁and ▁gro ve ▁V - joint ed ▁p ine ▁( ho op ▁p ine ), ▁or ▁fib ro ▁c ement . ▁The ▁floor ▁was ▁made ▁with ▁tongue ▁and ▁gro ove ▁season ed ▁hard wood , ▁and ▁m ould ings ▁were ▁Queensland ▁p ine ▁( ho op ▁p ine ). ▁Jo in ery ▁could ▁be ▁made ▁with ▁ced ar , ▁o ak , ▁or ▁map le ▁tim ber . ▁The ▁price ▁of ▁a ▁Co or an ▁No . 3 ▁home ▁( tim ber ▁cl ad , ▁either ▁seven ▁in ch ▁weather board ▁or ▁four ▁in ch ▁cham fer board ) ▁was ▁now ▁; ▁a ▁Co or an ▁No . ▁ 4 ▁( D ur ab est os ▁cl ad ) ▁was ▁; ▁and ▁the ▁frame ▁alone ▁could ▁be ▁purchased ▁for ▁. ▁The ▁two ▁smaller ▁one - ▁bed room ▁models ▁still ▁sold ▁for ▁ ▁( ), ▁and ▁ ▁( ▁including ▁ver