Bal­conies up to stan­dard


Pilbara News - - Property - Dianne Gil­le­land

The Build­ing Code of Aus­tralia is the con­trol­ling doc­u­ment for build­ings, pro­vid­ing the min­i­mum stan­dards re­quired for de­sign and con­struc­tion.

Al­though the bal­cony is shel­tered by the roof and by the walls on three sides, the ori­en­ta­tion does not ex­empt it from pro­vid­ing nec­es­sary wa­ter­proof­ing and de­sign to ad­dress sur­face wa­ter on the floor.

Un­for­tu­nately, there are lim­ited ref­er­ences to bal­conies. You are re­liant on your ar­chi­tect or de­signer to de­tail the bal­cony for cer­ti­fi­ca­tion by a build­ing sur­veyor, ei­ther pri­vately or at the per­mit ap­proval au­thor­ity.

The fact it is fully roofed ad­dresses the top sill flash­ing re­quire­ments for th­ese open­ings. How­ever, the floor is still an ex­ter­nal sur­face and should have a suit­able level dif­fer­ence be­tween in­ter­nal and ex­ter­nal ar­eas. As such, the floor should fall suit­ably away from the build­ing.

There are rec­om­mended height dif­fer­ences for slab-on-ground con­struc­tion that could be ap­plied to bal­conies.

For wa­ter­proof­ing of the floor, the bal­cony must meet Aus­tralian Stan­dard AS4654. The bal­cony you are propos­ing is quite big, so it’s likely to re­quire more than one drainage point.

You have men­tioned a flush thresh­old to the slid­ing and French doors. It is im­por­tant to note most stan­dard door and win­dow frames for slid­ing and French doors are not de­signed for a smooth thresh­old. Suit­able frames with flash­ings are re­quired to drain wa­ter to en­sure no dam­age to in­ter­nal floors.

The lo­ca­tion of your home is also a con­sid­er­a­tion for the se­lec­tion of fix­ings and ma­te­ri­als. Suit­able cor­ro­sion pro­tec­tion is nec­es­sary where the build­ing work is within 10km of the coast.

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