For builders & renovators
Concrete Slab Drying & Moisture Testing Christchurch
Stop losing weeks waiting on slabs. Engineered drying plus documented testing — accepted by every major flooring manufacturer.
A 100mm slab can carry over 200 litres of water of crystallisation. Flooring manufacturers won't honour their warranty if you lay over a slab above spec — and the callback for cupped timber or de-laminated vinyl lands on the builder. We accelerate slab drying with LGR + desiccant dehumidification and provide hygrometer-based RH testing (ASTM F2170-equivalent) before your floor goes down.
- Slab RH testing with in-situ probes
- Calcium chloride (MVER) testing on request
- LGR + desiccant drying to flooring spec
- Reports formatted for flooring warranty submission
- Schedule-aware: we sit alongside your flooring sub
How we work
Our concrete slab drying process
1. Initial reading
Probe-based RH and surface moisture readings to baseline the slab.
2. Drying plan
Daily target curve based on slab thickness, additives, formwork and ambient conditions.
3. Active drying
Closed-environment dehumidification with daily monitoring.
4. Final verification
Pass/fail readings against flooring manufacturer spec, with full report.
FAQ
Frequently asked questions
What slab RH do most flooring manufacturers require?
Typical specs are 75% RH for resilient flooring, 65% RH for hardwood and many vinyls — but always check the specific product datasheet. We'll dry to your number.
How long does a new slab take to dry naturally?
Rule of thumb is one month per 25mm in ideal conditions — and Christchurch winters are nothing like ideal. Accelerated drying is usually 5–15× faster.
Related services
New Build Drying
Accelerated structural drying for new builds — slabs, framing, plaster and insulation — so your trades stay on schedule.
Renovation Drying
Drying support for renovations — bathroom waterproofing, kitchen rip-outs, leak rectifications and re-clads.
Plaster & Paint Drying
Drive plaster, skim and paint to recoat-ready in hours, not days.
Need concrete slab drying on your next Christchurch job?
Same-day quote turnaround for active sites. Booked drying windows for new builds.