Siding Inside Corner

Trim Purpose

Specs, MSDS, and LEED Information for Flannery Trims & Products

Flannery’s Siding Inside Corner is a trim that creates a sharp and crisp corner where siding is installed on walls that meet at a 90° inside corner joint. The Inside Corner trim creates a solid and clean corner for the siding system which would normally require the two pieces of siding to be laid together at an inside corner. With a 1″ face flange, the Inside Corner allows the installer to slide the siding in behind the flange and cover the unfinished edges of the siding. The larger face leg of the Siding Inside Corner allows for the possible expansion or contraction of the siding along a horizontal run.

Manufacturer's Specifications

Flannery’s Siding Trims are standard extruded aluminum alloy 6063 T5 and have a .050” nominal wall thickness. Aluminum panel trims come in 10′ lengths and shall have a standard Clear Anodized Finish. Mill Finish (for field priming & painting), Chem-film finish or other factory finishes and custom paint orders are available.

You can view our factory finishes to see if we have what you are looking for or if you do not see the finish, you are looking for, chances are we can color-match it or we already have it! Flannery Trim wants to always make sure we can get you the right look and feel for your building project.

Siding Inside Corner

Part No. “A” Width “B” Width Siding Compatible Stock Item Downloads
SIC 625-100 5/8″ 1″ 1/2″ Siding Yes DWG - Siding Inside CornerPDF - Siding Inside Corner
SIC 875-100 7/8″ 1″ 3/4″ Siding Yes DWG - Siding Inside CornerPDF - Siding Inside Corner

Installation of Siding Trims must be in accordance with the Siding Manufacturer’s Instructions. For TruGrain made with Resysta Siding’s installation instructions, please visit their website,


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