NZ Technical Data Sheet
The definitive reference for eco-log construction performance in the New Zealand context. Carbon sequestration, structural longevity, health benefits, natural resilience, and maintenance, explained in plain language.
Why Solid Log Construction?
The construction sector is a significant contributor to New Zealand's carbon footprint. Solid log construction is not merely a stylistic choice. It is a strategic intervention in the carbon cycle. Your estate begins its life as a net carbon remover, not a carbon emitter.
Solid Timber Wall
~798 kg CO₂ sequestered per m³. Your wall removes carbon from the atmosphere.
140mm Concrete Block
Before steel reinforcing and concrete grout fill. With those, the figure rises sharply.
Engineered to Protect
Structural Flexibility
Hand-scribed joints allow logs to flex and settle naturally with the land, absorbing and dissipating energy through friction rather than rigidity. This engineered harmony means the structure grows more settled and solid over time, the opposite of planned obsolescence.
Hygroscopic Health
Timber is hygroscopic. It adsorbs water vapor when humidity is high and releases it when air is dry. This natural regulation keeps indoor humidity in the optimal 40–60% band, minimising viral survival, preventing mold, and eliminating the dry-air discomfort caused by conventional heating.
Biogenic Carbon Sink
NZ Radiata Pine sequesters approximately 798 kg of CO₂ per cubic meter. When your estate is built, this carbon is locked in the building fabric for 50–100+ years. The structural system begins its life with a negative carbon footprint, a credit that offsets emissions from glazing, roofing, and foundations.
Natural Resilience
Solid timber's natural mass provides extraordinary structural integrity and insulation that improves with age. Properly maintained, timber estates routinely outlast their minimum design life by generations. The same structures Ilia observed in Siberia, built centuries ago, still stand proud today.
NZ Eco-Log Fast Facts
| Metric | Data Point | Context |
|---|---|---|
| Carbon Sequestration | ~798 kg CO₂ / m³ | Amount of CO₂ stored in 1 cubic meter of NZ Radiata Pine. |
| Embodied Carbon | Negative (Net Sink) | Solid log walls store more carbon than is emitted in their manufacture. |
| H1 Wall R-Value | R1.2–R1.5 | Steady-state R-value. Compliance achieved via Calculation Method. |
| Structural Flexibility | μ = 2.0–3.0 | Energy dissipation factor of hand-scribed log joints, designed to flex with the land. |
| Natural Resilience | Exceeds NZBC | Solid timber mass provides inherent structural protection and insulation. |
| Ground Clearance | 300–400 mm | Best practice clearance from ground to prevent rot. |
| Durability Period | 50+ Years | NZBC B2 requirement for structural elements. Achievable with stewardship. |
| Optimal Humidity | 40–60% RH | Indoor humidity range naturally maintained by timber mass. |
| Recoat Interval | 2–3 Years | Maintenance cycle for North/West walls using penetrating oils. |
| Primary Species | Pinus radiata | Dominant NZ plantation timber, renewable, treatable, and strong. |
Maintenance Schedule
A log estate is a living structure that rewards care. This NZ-specific schedule ensures your investment endures beautifully across generations.
Log Wash (Soft Wash)
Remove salt spray, pollen, and dirt that hold moisture and feed mold.
Mould Treatment
Kill spores before the damp winter. Critical for South/East walls.
Penetrating Oil Recoat (N/W)
Replenish water repellency on sun-exposed faces.
Penetrating Oil Recoat (S/E)
Maintain protection on shaded sides.
Check Sealing
Prevent water pooling in deep checks >5mm that face upward.
Ground Clearance Check
Prevent soil/mulch buildup against bottom logs.
Settling Adjustment
Adjust screw-jacks on vertical posts. Check window/door flashings.
Insect / Borer Inspection
Detect early signs of borer or termite activity.
NZ H1 Energy Efficiency
The H1/AS1 standard requires minimum R2.0 for walls. Solid log walls achieve R1.2–R1.5, which means the simple Schedule Method is not viable. We use the Calculation Method, trading slightly lower wall performance for superior roof (R7.0–R8.0) and floor (R2.5+) insulation. The building performs as a whole system.
For complex designs, we employ the Modelling Method (H1/VM1) using EnergyPlus simulation. This accounts for the thermal mass of solid log walls, the decrement delay effect that conventional R-value calculations ignore. A log home with R1.5 walls can consume less energy annually than a lightweight frame home with R2.0 walls.
Ready to Build Your Legacy?
This data sheet is the beginning. A private briefing will walk you through every detail as it applies to your specific site and vision.