On level 6 from internal access only, we demolished the existing 50 aluminium windows, specified a new suite to meet requirements for Inhabit the consultants, fabricated and installed the items. Acoustic and thermal upgrade of the system with IGU and new awning system integrated with mechanical to optimise airflow performance. With internal access only we needed to complete installation testing within the factory to ensure we could achieve flashing/cladding integration waterproofing reg.126 without booms, scaffolding or lifting equipment. Sash Et Al successfully completed this and within both budget and time frames.