Crateworks Supply Co: One Sourcing Partner for Every Material

Appears inMaison Collection

Arc-Top Windows spec into Maison Collection builds. Multi-tag products are shown with the same canonical URL across every look they appear in.

Best for

Heritage facades and modern arched openings where the elevation calls for a curved head, dormers and stair landings, and transom-paired stacks above a square fixed picture window.

NFRC certified
CSA A440-22
AAMA 2605
STC 56

Crateworks holds NFRC certifications across casement, tilt-turn, fixed-picture, awning, sliding, bifold, entry, swing, and arc-top configurations. Cert IDs disclosed on quote.

CSA A440-22 cold-climate certified #80224506. U = 0.236 to 0.387 depending on configuration.

AAMA 2605 PVDF coating, 20-year finish warranty.

STC 56 acoustic per ASTM E90.

Built to your opening

Every window made to order.

You specify the configuration axes below; we build to it. Frame colors are called out by RAL number.

Size
Radius (half-round, segmental, eyebrow, full-arch)
Glass (double or triple LowE Argon)
Color (RAL)
Finish (AAMA 2605 PVDF)

Regional posture

Spec by region.

One canonical product. Two regional postures with the cert and code considerations that change with the border.

United States

New construction (US)

In US new construction, arc-top windows ship with NFRC ratings (whole-unit U-factor and SHGC reported), CSA A440-22 #80224506 for IECC zones 5-8, AAMA 2605 PVDF finish on the frame. Cert PDFs ship with the project submittal for energy-code referencing.

Open new construction (us) →

Canada

Cold-climate Canada

For Canadian projects, arc-top windows carry CSA A440-22 #80224506 with U-factor range 0.236 to 0.387 depending on configuration. Triple-pane LowE Argon available across the line. Cross-border tariff and duty itemized on the quote.

Open cold-climate canada →

Common questions

An arc-top window is any window whose head meets the jamb on a curve instead of a 90-degree corner. The common variants are half-round (a full semicircle), segmental arch (a shallow arc), eyebrow (a very shallow arch), and full-arch (a tall pointed or rounded curve). All of them are built around the elevation drawing.

NFRC ratings are maintained on Crateworks arc-top configurations. The cert applies to the standard radius profiles documented on file; tell us the radius and we will confirm what is on cert before you commit.

Yes, this is the most common layout. A half-round or segmental arc-top pairs above a fixed picture or awning window to extend the daylight without adding a sash that needs to open at height. The arc-top stays fixed; the unit below carries the ventilation.

Yes. This configuration is NFRC certified. CSA A440-22 #80224506 is on file for cold-climate Canadian projects. AAMA 2605 PVDF finish, 20-year coating. STC 56 acoustic per ASTM E90. Cert PDFs are disclosed on every quote.

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