1. Hard-Nailing the Panels

One of the most common installation mistakes is driving fasteners tightly against the nail hem. ASCEND requires approximately 1/32-inch between the fastener head and the nail slot so the panel can move during normal thermal expansion and contraction.²

2. Eliminating Required Expansion Clearances

ASCEND requires clearance between the panel and receiving channels, corner posts, windows, doors, and other fixed objects. Cutting panels tightly removes the room required for seasonal movement and can place excessive stress on the cladding.³

3. Improper Plank Overlaps

The manufacturer specifies a precise overlap procedure, including flush-cutting the under-plank, maintaining a 1/2-inch overlap, leaving space between foam backers, and avoiding damage to the factory edge. Incorrect overlap installation can damage the panel and may affect warranty coverage.⁴

4. Using the Wrong Fasteners

Fasteners must meet the manufacturer's corrosion resistance, head size, penetration depth, and location requirements. Improper fasteners can reduce holding power and prevent the system from performing as designed.⁵

5. Installing Over an Improper Substrate

ASCEND should never be expected to straighten a severely uneven wall. Damaged sheathing, excessive waviness, moisture damage, loose siding, or unstable framing should be corrected before installation begins.⁶

6. Incorrect Installation Around Windows and Doors

Window and door details require proper flashing integration, receiving channels, expansion space, and in some situations finish trim or shimming. Shortcuts around openings are among the leading causes of service issues.⁷

7. Omitting Required Finish Trim

Whenever the top nail hem or bottom locking section is removed during a rip cut, ASCEND finish trim may be required to properly support the remaining panel. Unsupported cut sections can bow or pull away from the wall.⁸

8. Damaging Panels Before Installation

Panels should be stored flat, protected from direct heat, impact, and construction traffic. Damaged materials should never be installed with the expectation that fastening will correct the defect.⁹

9. Ignoring Manufacturer Installation Instructions

The warranty assumes the product was installed according to the current ASCEND Installation Guide and applicable building codes. Failure to follow those requirements may result in installation-related issues that are not considered manufacturing defects.¹⁰

10. Using Outdated Installation Procedures

ASCEND installation details evolve over time. Contractors should always verify they are using the latest installation guide, quick-start guides, and technical bulletins before beginning work.¹¹

The Bottom Line

Most warranty disputes involving exterior cladding are not caused by defective products—they are caused by installation shortcuts. Following the manufacturer's written instructions, documenting your work, and performing quality-control inspections during installation gives contractors the best opportunity to avoid callbacks while protecting both their customer and their reputation.