Aircrete Harry logo - Airform & Aircrete dome-building workshops at Observer Ranch, Penrose Colorado

Events at Observer Ranch

November 6-10 & December 4-8, 2026 · 9 AM-5 PM

Airform & Aircrete Workshops with Aircrete Harry

Build your own Tyvek dome airform and master the complete aircrete process in five hands-on days with Aircrete Harry, fully indoors at the Learning Center.

Airform & Aircrete Workshops is a hands-on dome-building intensive at Observer Ranch, taught by Aircrete Harry. Over five days you will design, cut, assemble, and sew your own Tyvek dome airform, then work through the complete aircrete process: foam generation, mix preparation, and application techniques. Every session runs fully indoors at the Learning Center, so winter weather stays outside and working conditions stay stable.

What's included

  • All airform materials and equipment: Masonite hardboard, Tyvek roll, rope, tape, markers, rulers, screws, sewing thread, and the industrial sewing machine
  • All aircrete materials and specialized equipment: Drexel foaming agent, thickening agent, air entrainment liquid, foam generator, mixers, barrels, trowels, and tools
  • Hands-on instruction from Aircrete Harry throughout
  • A fully indoor venue at the Learning Center for stable winter conditions

Two identical sessions are offered: November 6 to 10 and December 4 to 8, 2026, 9 AM to 5 PM daily. Within each session, days 1 through 3 are the Tyvek Dome Airform Workshop and days 4 and 5 are the Aircrete Workshop. Register for the full 5-day workshop ($1,000), just the 3-day airform portion ($600, November 6-8 or December 4-6), or just the 2-day aircrete portion ($400, November 9-10 or December 7-8). Each session is capped at 25 participants and requires a minimum of 14 to run.

Registration does not include lodging. Book your stay separately through NewBook, and a discount is applied automatically when you stay for the week.

About your host

Aircrete Harry is a creator, researcher, and educator known for aircrete dome building. Through AircreteHarry.com he shares video tutorials, purpose-built tools, and hands-on workshops that have helped people around the world build their own aircrete structures.

Tickets

Choose your pass

November 6-10 & December 4-8, 2026 · 9 AM-5 PM

Full 5-Day Workshop: Airform + Aircrete

$1,000

Days 1-5. Nov 6-10 or Dec 4-8.

3-Day Tyvek Dome Airform Workshop

$600

Days 1-3. Nov 6-8 or Dec 4-6.

2-Day Aircrete Workshop

$400

Days 4-5. Nov 9-10 or Dec 7-8.

Register

Make it a stay

Cabins, campers, and RV sites steps from the event

See Places to Stay

Event FAQ

When should I arrive?

Plan to arrive a little before the start time so you can park and check in without rushing. Your registration confirmation lists the day's start time and any check-in details.

Where do I park?

On-site parking at the ranch is free. Follow the event signage when you arrive and our team will point you to the lot.

Can I stay overnight at the ranch?

Yes. Observer Ranch has A-frame cabins, planet-themed campers, and full-hookup RV sites right on the property. Book your stay separately from your ticket so you can wake up steps from the event.

What should I bring?

Comfortable layers for changing mountain weather, water, and sun protection. Evenings can be cool and the skies are dark, so bring a jacket and a flashlight if you plan to be out after dark.

Is the venue accessible?

We want everyone to enjoy the ranch. If you have accessibility needs or questions, contact us before the event and we will do our best to accommodate you.

Tickets and refunds

Ticket options and any refund or transfer terms are shown at checkout. If you have a question about your order, reach out and we will help.

Questions before you register?

Contact Us