The steps below outline how REZICAST® allows builders to reach lock-up stage in just 10 days. From there the remaining construction takes places as usual, allowing a standard 4-bedroom, single storey home to be completed in just 10 weeks.
Day 1: Site Preparation
Cut/level site & excavate pads for the precast panels to be placed. As a fully engineered solution placing the panels on concrete pads and pouring the slab at later date is unique part of the system that creates efficiencies and superior structural performance. Excavate for plumbing if necessary.
Day 2: Place Wall Panels & Trusses
Precast panels are trucked to the site for installation. Cranes are set up, prior to trucks arriving, ready to lift panels into place one by one. As the panels are being placed the temporary props are positioned to secure the panels. Once all the panels are placed and secure the crane will lift each roof truss into position.
Day 3: Plumbing, Painting & Electrical
With the external walls and trusses in place the structure is secure. The props can be removed so the plumber can do all the internal drainage works ready for inspection. The precast panels can be primed and ready for painting, if that is the chosen finish. The electrician can install the power meter box into the panel opening and connect to Mains Power. Once the plumbing is done the concreting Contractor can commence preparation for the floor slab. The above termite protection install method complies with the Australian Standard AS3660.1-2000.
Day 4: Concrete Floor Slab Preparation & External Painting
Concreting contractor finishes floor slab preparation ready to pour. Paint the exterior of the precast panels which is usually done in a rendered paint e.g. Wattyl GranoImpact or Taubman Armawall depending on the finish the client has selected. Texture rollers can do around windows and doors without cutting in before windows are installed.
Day 5: Pour Main Floor Slab
The concreting contractor can pour and finish the floor slab. A boom pump is used through the trusses or alternatively a Line Pump is used through a window or door opening. Note: If necessary the roof can go on before the floor slab is done hence the option to use the line pump instead of a boom through the truss spacings.
Day 6 & 7: Roof Sheets, Windows & Internal Framing
Start roof, fascia and gutter. Internal wall framing can start (pre-fab or onsite construction). If pre-fab frames are used these can be walked through garage/alfresco/panel openings. Install Windows.
Day 8 & 9: Internal Fitout – Services Provision
The plumbing, electrical & ducting can be started if practicable. The roof can be finished and eaves placed. Install all external doors.
Day 10: Lock-up
The home should be all locked up and ready for you to send the lock-up invoice to your client and have you well on your way to completing within 10 weeks.
Weeks 3 – 10
For the remaining timeframe, construction progresses as it would on a traditional build.
Handover
Your client is now in their new home, and you’re free to work on other builds. Given precast doesn’t settle like brick homes, you can expect fewer defect complaints.