▁with ▁ind igen ous ▁wood ▁and ▁stone . ▁K ul ka ▁introduced ▁many ▁innov ations ▁into ▁his ▁industrial ▁designs ▁including ▁natural ▁light ing ▁and ▁the ▁introduction ▁to ▁New ▁Zealand ▁of ▁the ▁saw ▁to oth ▁factory ▁ce iling . ▁In ▁the ▁E . ▁A ▁Robinson ▁building ▁( 1 9 5 9 ) ▁K ul ka ▁designed ▁a ▁double ▁fen estr ation ▁system ▁so ▁that ▁offices ▁within ▁the ▁deeper ▁sections ▁of ▁that ▁structure ▁could ▁benefit ▁from ▁internal ▁glass ▁fac ades ▁which ▁enabled ▁natural ▁light ▁to ▁per me ate ▁into ▁these ▁working ▁spaces . ▁In ▁the ▁entrance ▁to ▁F let cher ▁Building ▁( 1 9 4 1 - 1 9 4 2 ) ▁K ul ka ▁designed ▁a ▁dram atic ▁cur ved ▁st air case ▁l ined ▁with ▁light ▁mar ble ▁and ▁am ber ▁native ▁wood . ▁ ▁Priv ately , ▁K ul ka ▁realized ▁over ▁ 4 0 ▁fine ▁wooden ▁houses ▁throughout ▁New ▁Zealand . ▁His ▁wooden ▁houses ▁were ▁innov ative ▁in ▁their ▁spatial ▁and ▁material ▁resolution . ▁The ▁Hal ber st am ▁House ▁in ▁Well ington ▁( 1 9 4 8 ) ▁is ▁an ▁excellent ▁example ▁of ▁K ul ka ' s ▁ability ▁to ▁design ▁compact ▁minimal ▁dwell ings . ▁The ▁single ▁level ▁b ung al ow ▁s its ▁on ▁top ▁of ▁a ▁small ▁hill ▁in ▁Well ington . ▁It ▁had ▁a ▁very ▁mod est ▁construction ▁budget ▁and ▁post ▁war ▁building ▁restrictions ▁were ▁im posed ▁on ▁the ▁commission ers . ▁Not with standing ▁these ▁constraints , ▁K ul ka ▁built ▁a ▁striking ▁cub ic