Inside Corners
Where two surfaces meet at an inside angle, the detail matters. We fabricate inside corner trim to your exact angle and dimensions — not just 90°.
What We Build
Inside corners are one of the most common trim pieces on any siding or wall panel project — and one of the most visible when done wrong. Stock inside corners come in 90° only. Real buildings have angles that vary, settle, and shift.
We fabricate inside corners to match your actual wall angle, panel profile, and color. Tight, clean bends with consistent leg lengths that line up with your panel edges every time.
Equal-leg or unequal-leg profiles. Custom angles from 45° to 135°+. Hemmed edges available.
Designed to receive panel edges cleanly. Works with corrugated, standing seam, board & batten, and flat panel siding.
Valley-to-wall transitions, dormers, and chimney inside corners. Weather-sealed details for water management.
Materials
Every piece of trim we fabricate is available in any standard color from Metal Sales Manufacturing and AEP Span — 30+ colors between the two lines. We also work with Galvalume, bare steel, aluminum, copper, and stainless steel from Pacific Steel & Recycling.
Standard gauges: 24, 26, and 29 gauge for painted steel. Heavier gauges available for structural and specialty applications. All trim is brake-formed in our Reno shop on the same equipment we use for roofing panels, kitchen hoods, and architectural metalwork — so tolerances are tight and finishes are clean.
More Trim Products
Get Started
Send us your measurements, a sketch, or just describe what you need. We'll get back to you with pricing and lead time — usually same day.
Contact
keith@proformmetals.com
2415 Dickerson Road, Reno, NV 89503
Mon – Fri, 7 am – 4 pm
Share the details and we will follow up fast with next steps.
We will follow up within one business day.
Email photos to keith@proformmetals.com.