The mill
The mill is the company.
Thermosticks isn't a warehouse reselling containers. Finnish-modified lumber arrives here rough; our moulder turns it into the profile on your drawing. Milling in-house is why prices stay published, lead times stay at 2–4 weeks, and custom work costs a flat tooling charge instead of a minimum-order wall.
How an order runs
Five steps, no mystery.
Send the spec
Square footage and a profile, or just a section drawing. Email, form, or a phone call to the shop — whatever's fastest for you.
Delivered price, next day
You get an itemized quote within one business day: boards, tooling if any, and freight to your zip. No callback loop, no account required.
Knives & first article
For custom profiles, we grind the knives and run a first article — then photograph it against your drawing before running the order.
Mill, grade, tally
Every board is graded coming off the moulder. Offgrade never gets bundled — it goes to the cutoff rack, not your jobsite.
Packed & shipped
Bundles are wrapped, labeled, and loaded. A mill tally sheet and grading record ride with every shipment.
The paper trail
Documentation you can put in the spec.
Everything an architect or building department asks for, in one place.
Product spec sheets
Dimensions, profiles, durability class, and fastening guidance for every product we stock.
ITWA membership
Member of the International ThermoWood Association — the body whose handbook defines the process and product classes.
FSC® & PEFC sourcing
The pine we mill is sourced from FSC- and PEFC-certified forests in Finland. Full story on our sustainability page.
Mill tally & grading record
See exactly what rides with a shipment: board counts, lengths, and the grading record for the run.
Provenance
Modified in Finland. Milled here.
The thermal modification happens in Finland, to the ThermoWood® standard — the country and the process that invented the category. Everything after that happens in our shop in Greenville: profiling, end-matching, grading, and packing.
That split is deliberate. Finland does the one thing it does better than anyone; we do the milling close to your jobsite, where a question about a profile is a conversation, not a time zone.
The operation
| Modification | ThermoWood® process, Finland |
| Standard | ITWA handbook, Thermo-D |
| Milling & grading | Greenville, SC |
| Custom tooling | Flat charge per profile, kept on file |
| Mill visits | Mon–Fri, by appointment |
The shop floor is on Instagram most weeks — profiles coming off the moulder, first articles, and finished projects.