The key difference between Vinyl vs LP SmartSide Trim lies in their material composition, which dictates performance in the harsh North Dakota climate. Vinyl trim is a thin, flexible plastic product known for its low cost and maintenance-free finish, but it can become brittle and crack in extreme cold. In contrast, LP SmartSide trim is a thick, durable engineered wood product treated with resins and waxes for superior moisture, rot, and impact resistance. LP SmartSide trim provides the authentic look of real wood while offering robust stability and lasting durability needed to properly finish and protect your home’s exterior edges.
Quick Summary
The trim completes and protects your siding system. Vinyl offers affordability and requires no painting, while LP SmartSide provides superior durability, impact resistance, and a more substantial, authentic wood appearance. In a climate where trim is constantly hit by wind and temperature fluctuations, the robust structure of engineered wood trim often performs better. We recommend selecting a trim material that matches the overall performance and lifespan expectations of your primary siding choice.
The Purpose of Exterior Trim
Exterior trim—used around windows, doors, corners, and along the fascia—does more than just enhance curb appeal; it serves as a critical weather seal. Trim covers the vulnerable seams and transitions of your home’s exterior, preventing wind, water, and pests from entering the wall cavities. Because it is highly exposed, trim must be exceptionally durable against moisture penetration and physical impact, which is particularly challenging in North Dakota’s environment.
Definition: Engineered Wood Trim
Engineered Wood Trim, such as LP SmartSide, is a high-performance material manufactured from wood strands bonded with industrial-grade resins, waxes, and zinc borate. This process yields a product that resists fungal decay, rot, and termites, offering the workability and aesthetic thickness of traditional wood, but with dramatically enhanced durability and resistance to thermal stress.
Key Differences: Vinyl vs LP SmartSide Trim
Selecting the right trim is essential for a cohesive and high-performing siding system. The best choice depends on your priorities regarding aesthetics, durability, and cost.
Vinyl Trim
Vinyl trim is a lightweight, plastic material that is often color-matched to vinyl siding. It is popular because it is the most affordable trim option and requires virtually no maintenance, as the color is embedded throughout the material. However, its major drawback in ND is its structural weakness; like vinyl siding, it can become brittle in severe cold, making it susceptible to cracking and shattering from impacts like large hail or debris thrown by high winds.
LP SmartSide Trim
LP SmartSide trim is significantly thicker and heavier than vinyl, giving window and door openings a more substantial, traditional framed look. Its engineered wood core makes it highly stable and impact-resistant, providing superior protection against physical damage. While it requires painting (or comes factory-finished), its dimensional stability means it resists warping and is far less prone to failure in extreme cold than vinyl. It provides a highly durable seal for vulnerable corners and openings.
| Trim Factor | Vinyl Trim | LP SmartSide Trim |
| Material Composition | PVC Plastic | Treated, Bonded Wood Strands |
| Durability in Cold | Prone to brittleness and cracking. | High dimensional stability and impact resistance. |
| Aesthetic Thickness | Thin and flexible. | Thick, substantial, wood-like appearance. |
| Maintenance | None (unless repairing damage). | Requires painting/re-painting (or factory-finished). |
Installation and Durability Considerations in ND
Proper installation is paramount, regardless of whether you choose Vinyl vs LP SmartSide Trim.
When installing vinyl trim, allowing for proper thermal expansion and contraction is essential; otherwise, the trim may buckle or warp during extreme temperature swings. With LP SmartSide trim, the focus shifts to ensuring all cuts and edges are properly sealed and painted to prevent moisture penetration, maintaining its long-term resistance to decay. Both materials, when installed correctly by experts like Vander Wal Contracting, protect the building’s envelope, but LP SmartSide offers the added benefit of superior protection against physical impact damage that is common during Midwestern storms.
Siding and Trim FAQs
Can I mix LP SmartSide trim with vinyl siding?
Yes, this is a common practice. Many homeowners use the durable, thicker LP SmartSide trim around windows and corners for its robust aesthetic and superior impact resistance, even if they choose vinyl panels for the main wall surfaces.
Is LP SmartSide trim better than natural wood trim?
Yes, in terms of longevity. LP SmartSide trim offers the aesthetic of natural wood but is engineered with decay-resistant materials, meaning it won’t rot or attract pests like untreated natural wood does.
Does VWC offer color-matching services for LP SmartSide trim?
Yes, if you choose pre-finished LP SmartSide trim, we can ensure the color is perfectly matched to your siding panels or to a specific exterior palette.
How does trim help with home energy efficiency?
Properly sealed trim, when installed around windows and doors, acts as a crucial air barrier, stopping drafts and preventing conditioned air from escaping, thereby enhancing the thermal envelope of the home.
How long does LP SmartSide trim last compared to vinyl?
LP SmartSide often comes with a warranty of up to 50 years, suggesting a longer practical lifespan than standard vinyl trim, which typically lasts 20-30 years before becoming susceptible to sun-fading and brittleness.
Does damaged trim compromise my home’s structural integrity?
Yes. If the trim is cracked, missing, or rotted, it creates a direct pathway for wind and water to bypass the siding system and attack the structural sheathing and wall components beneath.
Invest in a Long-Lasting Exterior
The trim is the frame that protects the masterpiece of your siding. By choosing a high-quality product like LP SmartSide trim, you are making a conscious decision to invest in superior protection and durable aesthetics that will last for decades in the North Dakota climate.
Ready to enhance your home’s defense with durable trim? Contact us today for a free consultation at our dedicated Siding service page.
By: Vander Wal Contracting Team Last Updated: November 17, 2025