Indian Standard (3916-1966) for pig housing, recommends a range of 0.9- 1.8 m2 floor area under covered and open space from weaning to finisher stage. Present study assessed whether, IS recommended open area is advantageous to improve welfare and growth performance of fattener pigs during summer season. A total of 20 piglets (10 castrated male and 10 females) at 3 months of age with average body weight 18.94 ± 1.04 Kg were randomly assigned to two housing treatments groups namely Tc; with lower limits of IS recommended covered floor space of 0.9 m2 per pig and To; with higher limit of IS recommended floor area of 1.8 m2 per pig, in which half, 0.9 m2 was under covered space and remaining half 0.9 m2 open space. Results revealed that provision of additional floor area of 0.9 m2 in open space did not improve growth performance and welfare of pigs during summer season. Therefore, IS recommended open space in pig housing is not necessary and can be removed to improve space, labour and overall economic efficiency of pig production.