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Hardwood Mill
Technical Specification — Cross-Section ViewREV 04 · FEB 2026
UV FINISHCOATS 1–7WEAR LAYER3.2 mmADHESIVEBOND LINESPECIES COREWHITE OAKFINISH DEPTH0.18 mm TOTALJANKA HARDNESS1290 lbfTONGUE & GROOVE±0.003″ TOL.19.05 mmPLANK WIDTH: 5″ / 7″ / 9″ AVAILABLEBATCH NO. GRN-2602-WO-07 · KILN RUN 14 · LOG DECK ROW C-4

Production Cycle

Milled in 72 hours.
Ships in 5 days.

Moisture Tolerance±0.5%
Dimensional Tolerance±0.003″
Batch Traceable100%
Domestic OriginUSA
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01
STAGE 01Log Deck Row C-4

From standing timber to log deck

Log Selection

Every board begins at the log deck. We source domestic white oak, red oak, hard maple, and hickory from certified Appalachian and Great Lakes suppliers. Each log is graded on-site: ring density, straightness, and moisture at the heartwood are measured before the saw touches bark.

Specification Sheet — Stage 01
Source RegionAppalachian + Great Lakes
SpeciesWhite Oak / Red Oak / Maple / Hickory
Min. Ring Density8 rings/inch
Heartwood MC35–55% green
CertificationFSC® Chain of Custody
Log GradingFAS + Select
Stacked hardwood logs at a lumber yard under raking morning light
Log Deck Row C-4
02
STAGE 02Kiln Run 14

Precision thermal conditioning

Kiln Drying

Logs are slabbed and loaded into computer-controlled dehumidification kilns running a 14-day schedule. Temperature and humidity are logged every 15 minutes. We target 6–8% final moisture content — the window where dimensional movement is minimized and the wood accepts finish without adhesion failure.

Specification Sheet — Stage 02
Kiln TypeDehumidification / Solar Assist
Schedule Duration14 days
Final MC Target6.0–8.0%
MC Tolerance±0.5%
Log IntervalEvery 15 min
Casehardening TestProng test, every batch
Interior of industrial lumber kiln with stacked planks and steam vents
Kiln Run 14
03
STAGE 03Mill Station 3

Tongue, groove, and dimensional precision

Milling

Dried blanks enter a four-head moulder running at 1,800 RPM. Tongue-and-groove profiles are cut to ±0.003″ tolerance. Each plank is end-matched and face-sorted. A laser micrometer reads every plank at the outfeed — any board outside tolerance is rejected to the seconds bin, not to your job site.

Specification Sheet — Stage 03
Moulder4-head, 1800 RPM
T&G Tolerance±0.003″
Width Options3″ / 5″ / 7″ / 9″
Thickness¾″ (19.05 mm)
End MatchStandard on all widths
Laser QC100% inline, every plank
Close-up of industrial woodworking mill machinery cutting hardwood planks
Mill Station 3
04
STAGE 04Finish Line 2

7-coat UV-cured polyurethane system

Finishing

Sanded to 120-grit, then loaded onto the finishing line. Seven coats of UV-cured polyurethane are applied in sequence — two sealer coats, three build coats, one color coat, one top coat — each cured instantly under 300W/cm² UV lamps. The result is a finish harder than any air-dry system and ready for installation the day it ships.

Specification Sheet — Stage 04
Coat Count7 coats total
SystemUV-cured polyurethane
UV Intensity300 W/cm²
Cure TimeInstant per coat
Abrasion (ASTM D4060)< 80 mg loss
Sheen OptionsMatte 15° / Satin 35° / Semi 55°
Hardwood flooring planks with glossy UV finish under industrial lighting
Finish Line 2
05
STAGE 05QC Station Final

Batch-stamped and traceable to the log deck

Quality Control

Before palletizing, every plank is visually graded and stamped with a batch number encoding species, kiln run, mill date, and log deck row. A digital twin record is created in our traceability system. GCs and distributors can scan any board on a job site and pull the complete manufacturing record — moisture curve, finish adhesion test, and inspector sign-off.

Specification Sheet — Stage 05
Batch StampEvery plank, UV ink
TraceabilityLog deck → job site
Grading StandardNHLA + Grain Proprietary
Adhesion TestASTM D3359 Cross-cut, 5B
Moisture Final CheckPin meter, 10% sample
Warranty25 years residential / 10 years commercial
Quality control inspector examining hardwood flooring plank under bright inspection lights
QC Station Final

Species Catalog

Four species.
All domestic. All milled here.

Janka ratings, moisture content, and width availability for every species we mill. No substitutions. No back-orders from overseas.

Close-up of white oak hardwood flooring grain texture under raking light
POPULAR
WO

White Oak

Straight to wavy, prominent ray fleck

Janka1290 lbf
MC7.2%
3″5″7″9″
Red oak hardwood flooring plank showing open grain cathedral pattern
RO

Red Oak

Open grain, pronounced cathedral

Janka1220 lbf
MC7.0%
3″5″7″
Hard maple hardwood flooring with fine uniform grain texture
HM

Hard Maple

Fine, uniform, bird's eye available

Janka1450 lbf
MC6.8%
3″5″
Hickory hardwood flooring showing bold contrasting grain and rustic character
HK

Hickory

Bold contrast, rustic character

Janka1820 lbf
MC7.5%
3″5″7″
STAGE 06Head-to-Head

Domestic mill
vs. overseas import.

Eight metrics. Real numbers. The amber value wins. Judge for yourself before your next bid package.

Metric
Grain / Domestic
Overseas Import
Lead TimeFrom order to dock
5 business days
8–14 weeks
Dimensional ToleranceT&G profile accuracy
±0.003″
±0.010–0.020″
Moisture ConsistencyAt point of installation
6.0–8.0% ±0.5%
8–14% ±2–4%
Finish DurabilityASTM D4060 Taber abrasion
7-coat UV cure, <80mg loss
3–5 coat air-dry, 120–180mg
Minimum Order QtyPer species/width SKU
200 sq ft
1 container (2,000+ sq ft)
Freight CarbonAvg. domestic truck vs. container ship
0.04 kg CO₂/sq ft
0.38 kg CO₂/sq ft
WarrantyStructural finish warranty
25 yr residential / 10 yr commercial
5–10 yr residential
Batch TraceabilityScan any plank on-site
Log deck → job site
Container lot only

Download the Full Spec Sheet

30-page PDF with all tolerance data, finish adhesion test results, Janka curves, and ASTM test reports. Drop it into your next bid package.

Sample Program

Request a
Sample Board.

A full-size 12″ × 5″ sample board, batch-stamped, with species, finish, and dimensional data printed on the back. Ships within 3 business days. Free for qualifying GCs, designers, and distributors.

Batch-stamped sample with full traceability data
Finish comparison card (matte / satin / semi)
Species spec sheet with Janka and MC data
Lead time quote for your project square footage
LOG SELECTION·KILN DRYING·MILLING·FINISHING·QUALITY CONTROL·LOG SELECTION·KILN DRYING·MILLING·FINISHING·QUALITY CONTROL·
Sample Request Form — GRN-SR-2026

Free shipping · 3-day lead time · FSC® Certified