XMK RV Skylight Replacement Dome 18"x26" — Fits 14"x22" Openings, Thick UV-Stable Polycarbonate

The XMK RV skylight replacement is an 18" x 26" outer dome made of thick polycarbonate that fits standard 14" x 22" skylight openings, bringing durable weather protection and natural light into your camper.

Replace a worn or broken roof dome with this sturdy XMK outer skylight cover designed specifically for RVs, travel trailers, motorhomes and fifth wheels. Its outer dimensions allow for reliable mounting over the common 14" x 22" opening while the thicker polycarbonate construction resists impacts and sun damage. Available in several tints, it brightens interiors, helps moderate heat, and installs without the weight or fragility of glass.

How does this skylight match my RV's 14" x 22" opening?

The XMK dome is sized to sit over the standard 14" x 22" skylight flange while offering extra roof coverage for a secure seal. Pre-drilled mounting points simplify alignment so you can position it cleanly over your existing frame.

• Outer dome dimensions: 18" x 26" for full flange coverage
• Inner clear opening fits 14" x 22" cutouts
• Pre-drilled holes provided for straightforward attachment
• Lightweight design compatible with common RV roof flanges

Will the material hold up to wind, sun and road debris?

This replacement dome uses a thicker polycarbonate engineered for outdoor exposure and impact resistance. A UV-stable coating reduces yellowing and helps protect your RV interior from solar degradation over time.

• Impact-resistant polycarbonate resists stones and branches
• High-temperature tolerance for hot climates
• UV protective coating to limit fading and interior UV exposure
• Longer service life versus thin acrylic domes

Which tint should I choose and how does tint affect interior light and heat?

XMK offers multiple tints so you can balance daylight, privacy and heat control. Darker tints filter more solar heat, while clear and white finishes admit the most natural light; choose based on climate and desired interior brightness.

• Smoke gray: reduces summer heat while maintaining good daylight
• Tawny: filters harsh sunlight for a softer glow
• Clear/white: maximizes natural light for a brighter cabin
• Dark blue: reduces glare and offers a distinctive sky view

How easy is the installation and what extra steps increase leak protection?

Installation is intended to be straightforward: the dome is lighter than glass and pre-drilled for mounting. For a watertight result, use a quality RV skylight sealant between the flange and dome and follow torque recommendations for fasteners.

• Pre-drilled holes speed alignment and attachment
• Lighter weight simplifies handling and reduces risk during mounting
• Recommended: apply skylight sealant to prevent leaks and drafts
• Trim or drill additional holes if needed for custom flanges

Who this is for: The XMK 18" x 26" outer skylight dome is ideal for RV owners, DIY renovators, and service techs replacing damaged or yellowed skylights on standard 14" x 22" openings. It suits campers and motorhomes where impact resistance, UV protection and ease of installation are priorities—especially in travel situations where weight and durability matter.