Case study: Conqra STUNNA

Premium domestic residence, Orewa

The challenge

An innovative European-inspired design required the construction of a concrete raft floor as an alternative to a suspended timber mid floor. The size of the dwelling, large open spaces in the lower level and extensive decks, combined with the contour of the site, presented some tricky challenges.

The Conqra solution

The owner held a number of meetings with Conqra to develop solutions and complete the required engineering. To provide extra insulation and reduce cost and time, a Conqra Polyraft system was specified. This in turn required the innovative Conqra Stunna system to ensure an even spread of concrete over the reinforcement. It would prove to be the vital factor in delivering an immaculate finish with complete structural integrity.

The result

This is a stunning, architecturally designed home that makes full use of its prime Orewa position. Instead of the traditional timber mid floor, it boasts a concrete raft floor tied into the extensive concrete block walls at three sides and includes a concrete deck. Using Conqra Stunna spacers to form the canals and cages minimised risks with this innovative design and delivered a show-stopping result.

The house’s quality was recognised in 2010 when the Auckland Registered Master Builders’ announced this house as the winner of Gold and Gold Reserve Awards ($600K – $1M category). It was also a finalist in the NZ Master Builders’ Awards.

Standard Conqra Poly Raft incorporating a block retaining wall footing
Block retaining wall also supporting upper level with large blocks of poly rock or geotechnical foam, being used as a lightweight alternative to hard fill
Block retaining wall also supporting upper level with large blocks of poly rock or geotechnical foam, being used as a lightweight alternative to hard fill
Showing scaffolding being erected to support the ply formwork to support the upper level
Showing scaffolding being erected to support the ply formwork to support the upper level
Showing the underside of what is now a suspended Conqra Poly Raft floor, Conqra are the only providers of this system
Showing the underside of what is now a suspended Conqra Poly Raft floor, Conqra are the only providers of this system
Showing the underside of what is now a suspended Conqra Poly Raft floor, Conqra are the only providers of this system
The finished product, with a cast-in-situ step down concrete deck on the upper level
The finished product, with a cast-in-situ step down concrete deck on the upper level

“My wife and I are absolutely thrilled with the final product and know we have not only a beautiful home, but one that is constructed from permanent materials that won’t leak, squeak or deteriorate for the life of the house.”

– Rick Soar, Homeowner