Heavy-duty PVC covers patterned specifically for Trillium zome frames. No cutting, no glazing, no guesswork — the cover drops over your bare 2x4 frame, cinches down, and you're dried in. Build your quote below, reserve it, and your invoice lands in your inbox within 1 business day.
Build your quoteAdd as many covers as your project needs. Freight ships palletized to one delivery address. Reserve the quote and we'll email your invoice within 1 business day, with your Founders pricing locked for 7 days.
Step 1 — Pick the cover
White block-out 850 gsm PVC with clear panel sections. Fire-retardant. Shade in summer, cozy in winter.
100% clear 980 gsm PVC, also fire-retardant. Full light for growing, sun rooms, and star-gazing spaces.
Step 2 — Pick a size
Step 3 — Delivery (applies to the whole quote)
Review the estimate, tell us where it is going, and Johnny will send your invoice within 1 business day.
These aren't generic dome covers. Every panel is patterned to Trillium zome geometry, so it fits your build like it grew there.
Passive stack ventilation up top keeps air moving and condensation down.
Operable screened openings on the lowest and middle rows for cross-breeze on warm days.
Reinforced perimeter grommets cinch the cover tight to your frame and foundation.
Drops right over full 2x4 framing. Insulate from the inside afterward, on your schedule.
The cover comes off, the frame comes apart, and the whole zome moves with you.
One year from delivery, handled by us — the same crew behind your plans.
You'll hear from us at every milestone. No wondering, no chasing.
Quote. Your reserved pricing holds for 7 days. Your order is confirmed when the invoice is paid.
Lead time. Estimated 3 months from paid invoice to your door. First production run — we quote honest dates and keep you posted at every step.
Cancellation. Full refund any time before we place the factory order (we'll announce that date). After the factory order: 85% refund or 100% store credit. Once your cover is on the water: store credit only. Once freight is scheduled to your address: no cancellation — your warranty takes over from there.
Warranty. One year from delivery against defects in materials and workmanship: seams, zippers, vents, and hardware. Register your cover within 30 days of setup with a couple of photos. Doesn't cover damage from weather events beyond frame spec, modifications, or use on non-Trillium frames.
Delivery. Palletized LTL freight. Inspect before the driver leaves and note any damage on the delivery receipt — we'll walk you through it.
The frame is the structure. The cover is your weatherproof membrane; snow and wind capacity come from a frame built to plan. Permitting and local code are on you, and we're happy to point you in the right direction.
A look inside and outside completed Trillium zomes, from the exposed timber frame to the finished weatherproof cover.
These are big, made-to-order items shipping freight. Reserving a quote lets us double-check your sizes, combine freight when you order multiple covers (often saving you money), and send one clean invoice. You get a human on every order, and the invoice arrives within 1 business day.
Yes — that's the whole point. If you built to plan with full 2x4 framing, the cover is patterned to your exact geometry. If you modified your build, tell us in the notes and we'll confirm before invoicing.
Yes. The cover goes over the bare frame, and you insulate between the studs from the inside afterward. Most builders do exactly that.
Each batch is made to order at the factory, then ships by sea to Washington. We quote 3 months so we can beat it, not miss it — and you'll get updates at every milestone.
That's on us — the freight on your invoice matches your quote. For Alaska, Hawaii, and remote or island addresses we'll quote your freight individually before invoicing.
Both cover materials are fire-retardant and certified: the 850 gsm white PVC-coated polyester and the 980 gsm clear PVC. Even so, keep open flame and space heaters well away from any cover material, and follow your stove manufacturer's clearances if you install one.
Yes. The cover unlaces from the grommets and comes off, the frame disassembles, and the whole kit relocates. It's one of our favorite things about this system.
Trillium Domes – Port Townsend, WA support@trilliumdomes.com
Questions before you reserve? Book a consultation and we’ll talk through your build.
