Create a flat, secure mounting surface for RV roof vents and fans on contoured OEM van roofs. This patent-pending roof vent adapter is CNC-machined from UV-resistant and fire-resistant expanded PVC, providing a durable foundation that helps prevent roof panel distortion and improper vent installation.

Designed to match the contour of the factory roof, the adapter allows standard 14" x 14" RV vent fans to be mounted correctly while maintaining a professional, watertight installation.

Features:

• Patent-pending design contours to OEM van roofs

• Creates a flat mounting surface for standard RV roof vents and fans

• Helps prevent roof sheet metal and vent flange distortion

• CNC-machined from UV-resistant and fire-resistant expanded PVC

• Compatible with 14" x 14" roof vent openings

• Works with many popular roof fan brands and models

• Can be used as a positioning guide when marking vent cutouts

• Durable construction designed for long-term outdoor exposure

Compatible with:

• Airplus Vent Fans

• Maxxair Deluxe Series Vent Fans

• Fan-Tastic Vent Fans

Note: Some Maxxair models use a wider mounting flange and may require a larger adapter.

Specifications

• Vent Opening Size: 14" x 14"

• Adapter Outside Dimensions: 16.75" x 16.75"

• Material: Expanded PVC

• UV Resistant: Yes

• Fire Resistant: Yes

Optional Interior Framing Strips

Available framing strips provide additional structural support between factory roof beams. These expanded PVC supports:

• Help reduce vent movement and vibration

• Provide backing for interior trim screws

• Offer greater flexibility and moisture resistance than wood

• Are recommended when roof beam spacing exceeds 18"

Installation Overview

• Cut a 14" x 14" roof opening, avoiding factory roof supports.

• Bond the adapter to the roof using a high-quality adhesive such as Sikaflex® 221.

• Install optional interior framing strips if additional support is required.

• Mount the vent fan using butyl tape and appropriate fasteners.

• Finish with a compatible self-leveling roof sealant for a weatherproof installation.

Note: Longer mounting screws may be required depending on the vent model being installed.

What's Included

• Roof Vent Adapter

• Optional framing strips and butyl tape (when selected)

Important Notice

Installation should be performed using proper sealing and mounting practices. Periodically inspect roof sealants and reapply as needed to maintain a weather-tight installation.