Have a look at the guidelines for repairs and maintenance.
Repair and maintenance expenses | Australian Taxation Office
From the link, claimable expenses are those incurred to "keep your property in a tenantable condition" and "to fix wear and tear or damage that occurs while renting out your property".
You fail on both points. The property is not yet in a tenantable condition and the repairs and maintenance is not due to the renting out of the property.
These expenses are initial repairs (as outlined in link). Keep records of the expenses to include in the cost base of the property.
Capital items (assets) purchased and installed can be claimed over their effective life (depreciated) while the property is rented. The purchase and installation of security screens is a capital expense. Curtains as well.