Siding Flatboard Starter Strip

Trim Purpose

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

Flannery’s Starter Strip is a siding trim which was designed to enable the installer to hang the first level of TruGrain made with Resysta’s ½” Siding Flatboard to the wall. Since Trugrain siding is similar to a “tongue and groove” system, it needs something for the first layer to hook to when being hung. The Starter Strip is installed at the base of the wall where the first piece of siding will go on. The following layers of siding then hook to each other in a typical tongue and groove process. Flannery’s Siding Flatboard Starter Strip is an extruded aluminum product so it will maintain a rigid and clean edge for the siding to start from.

SKU: SJS 25-187 Category: Tags: ,

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. Click on Info Tab above for Factory Finishes.

Part No. “A” Width “B” Width Compatible Siding Stock Item
SJS 25-187 .210″ .240″ TGR 1/2″ Siding Board Yes
Siding Flatboard Starter Strip A B Dimen Shape R2 1000 BjB - Siding Flatboard Starter Strip

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,

01 Siding Flatboard Starter Strip Install Detail R5 1000 BjB - Siding Flatboard Starter Strip