AT1071-20 Moulded Half-Round Arch Trim — 20½″ Opening, 3⅜″ Face
- SKU:
- AT1071-20
- MPN:
- AT1071-20
- Condition:
- New
- Availability:
- Typically Ships within 2-3 weeks from Order Date
- Width:
- 20.00 (in)
- Height:
- 3.37 (in)
- Depth:
- 1.00 (in)
- Shipping:
- $129.00 (Fixed Shipping Cost)
Description
AT1071-20 Moulded Half-Round Arch Trim — 20½" Opening
Finish a half-round window or arched doorway with Spectis AT1071-20 moulded arch trim. This primed high density polyurethane (HDP) arch has a coved outer detail, recessed curved details and stepped bands, a 3⅜" trim width and a 1 1/16" projection. Pair it with matching MD1071 straight moulding for a coordinated surround.
20½" Inside Diameter
Designed for a 20½" half-round opening. Confirm the opening shape and dimensions against the product drawing.
Moulded Profile
3⅜" face width and 1 1/16" projection, matching MD1071.
Primed HDP Urethane
Decorative polyurethane arch trim supplied primed and ready for paint.
Made to Order
Confirm all dimensions before ordering. This made-to-order product is nonreturnable.

How to Read the Size
The 20½" dimension is the inside opening diameter, measured between the inner edges at the base. The trim is 3⅜" wide around the curve. Overall dimensions are 27¼" wide × 13⅝" high × 1 1/16" projection. The SKU ends in -20, but the drawing specifies a 20½" opening.
AT1071-20 at a Glance
Style: Moulded half-round archInside diameter: 20½"
Trim face width: 3⅜"
Overall width / height: 27¼" / 13⅝"
Projection: 1 1/16"
Material: High density polyurethane (HDP)
Finish: Primed, ready to paint
Matching trim: MD1071
See the Moulding Profile
The profile-detail panel beneath the arch shows matching MD1071 straight moulding. The arch has a coved outer detail, recessed curved details and stepped bands. Matching straight trim continues the moulded profile down the sides of your opening. Review the manufacturer drawing for exact dimensions and profile details.
Complete the Arch Surround
Continue the arch profile down each side with matching straight moulding. Matching components are sold separately.
Matching Straight Trim
MD1071 Profiled Casing Trim
1 1/16" projection × 3⅜" face width × 144" length.
Shop Matching Trim ›
Installation & Finish
Dry-fit the arch and matching components before fastening. Follow Spectis installation instructions, including the requirement to use Spectis adhesive on all bedding and butt joints. Secure the trim as directed, finish the joints and fastener holes, and paint after installation. This arch is decorative and is not a structural support.
How to Install Arch TrimStep-by-step guide, size chart and matching trimRead the Guide ›Shipping
This one is 48 inches or shorter, so it can ship UPS.
A piece the carrier will not take as a parcel goes LTL freight to a verified commercial address a 52-foot trailer can pull into. A house with a business in it does not qualify.
If the carrier calls the address a residence, a $275 fee is added, and you get a confirmation letter so you can correct the address or pay the extra freight.
The order goes to the Spectis plant in Manitoba the same day. Shipping from Canada typically takes two to three weeks.
Drawings & Resources
Product Drawing
Review the opening, overall dimensions and profile before ordering.
View AT1071-20 Drawing (PDF) ›
Matching Moulding Drawing
Review the MD1071 profile and straight moulding dimensions.
View MD1071 Drawing (PDF) ›
Spectis Catalog
See arch profiles and matching component information on catalog pages 122–123.
Open Spectis Catalog ›
Works with AT1071-20 — complete the look
Spectis parts made to go with this item, from the Spectis catalog and product drawings.
Each part is sold separately. Confirm profiles and dimensions against the drawings before ordering.
Questions
Which straight trim matches this arch?
MD1071 matches the 1 1/16-inch projection and 3⅜-inch face width of AT1071-20. Matching straight moulding is sold separately.
Does 20½ inches mean the overall width?
20½ inches is the inside opening diameter. Overall dimensions are 27¼ inches wide by 13⅝ inches high, with a 1 1/16-inch projection.
Does AT1071-20 fit a 20-inch opening?
The manufacturer drawing specifies a 20½-inch inside diameter for AT1071-20. Use that measurement, rather than the abbreviated SKU suffix, when checking your opening.
Are matching components included?
This listing is for the arch trim. Matching MD1071 straight moulding is sold separately.
Can I return this arch?
This arch is made to order and is nonreturnable. Confirm the drawing, opening size and profile before ordering.
Not sure this arch trim fits the opening? Weekdays, 8 a.m. to 6 p.m. Eastern.
800-986-1250 sales@spectis.usBuilders, designers, and customers: if Spectis products or the installation steps are modified, you agree to indemnify, defend, and hold harmless Veritas Products LLC, veritasproducts.com, and spectis.us from any claimed loss or damage, regardless of other instructions.
