Skip to content
LP SmartSide Expert Finish Brushed Smooth J-Block, 7-1/4 in. x 7-1/4 in. Pre-Finished Trim Block, 10 Colors
Regular price $56.50Orders start at $399 — combine any items to reach the minimum. Learn more
LP SmartSide Expert Finish Brushed Smooth J-Block, 7-1/4 in. x 7-1/4 in. Pre-Finished Trim Block, 10 Colors
LP SmartSide Expert Finish Brushed Smooth J-Block is a pre-finished 7-1/4 in. x 7-1/4 in. engineered wood trim block for mounting fixtures and finishing siding joints. Available in 10 brushed smooth colors, from Quarry Gray and Garden Sage to Midnight Shadow and Tundra Gray. It pairs with LP SmartSide trim and siding on homes and light commercial properties.
Key Features:
- Treated engineered wood: Made from LP SmartSide treated engineered wood designed for game-changing durability, beauty, and workability.
- Pre-finished color: Expert Finish factory-applied brushed smooth finish in 10 colors eliminates on-site painting.
- Standard trim size: 7-1/4 in. x 7-1/4 in. block sized for typical fixture mounts and siding J-channel details.
- Proven track record: LP SmartSide has over 20 years of successful performance and is among the fastest-growing trim and siding brands in the US.
- Workable material: Engineered wood cuts and installs with standard carpentry tools.
- Versatile application: Suited for homes, outdoor building structures, and light commercial properties.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | LP |
| Sell unit | 1 piece |
| Product line | LP SmartSide Expert Finish |
| Available colors | Quarry Gray, Garden Sage, Harvest Honey, Midnight Shadow, Rapids Blue, Redwood Red, Sand Dunes, Summit Blue, Terra Brown, Tundra Gray |
| Available sizes | 7-1/4 in. x 7-1/4 in. |
| Material | Treated engineered wood (LP SmartSide) |
| Finish / texture | Brushed smooth, pre-finished |
| Dimensions | 7-1/4 in. x 7-1/4 in. |
| Nominal size | 7-1/4 in. x 7-1/4 in. |
| Intended use | Exterior trim block for fixture mounting and siding joint finishing |
| Assembly | Fasten to wall framing or sheathing with compatible fasteners |
Coverage & How Much You Need:
One piece covers a single 7-1/4 in. x 7-1/4 in. trim location, such as a light fixture or hose bib mount. Count your fixture and joint locations per elevation and order one block per location.
Fit and Compatibility:
Part of the LP SmartSide Expert Finish trim program and designed to coordinate with LP SmartSide siding and trim installations. Sold by the piece; each color is a separate variant.
Frequently Asked Questions (FAQ):
Q: What is included in one unit?
A: One pre-finished 7-1/4 in. x 7-1/4 in. J-Block piece in your chosen color.
Q: What colors are available?
A: Ten brushed smooth colors: Quarry Gray, Garden Sage, Harvest Honey, Midnight Shadow, Rapids Blue, Redwood Red, Sand Dunes, Summit Blue, Terra Brown, and Tundra Gray.
Q: What is a J-Block used for?
A: It finishes around mounted fixtures like exterior lights and provides a clean J-channel recess in siding installs.
Q: Does it need painting?
A: No, the Expert Finish is factory applied in a brushed smooth texture, so no on-site painting is required.
Q: What material is it?
A: LP SmartSide treated engineered wood, designed for durability and workability.
Q: Can I use it with other siding brands?
A: It is designed as part of the LP SmartSide system; color match to other brands is possible but not guaranteed.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Pre-finished J-Blocks save labor and deliver a color-matched, consistent finish around every fixture—order a few extra since they are inexpensive and often damaged on site. Choose a color to match your LP SmartSide trim or create contrast at fixture locations. Fasten with corrosion-resistant nails sized for your substrate, and seal any cut edges per LP's finishing guidance.
Wear eye protection and follow fastener and cutting guidelines when installing engineered wood trim products.
Order LP SmartSide Expert Finish Brushed Smooth J-Block in your color for a polished, pre-finished fixture detail.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
