XMK RV skylight replacement 18x26 outer dome — fits 14x22 openings, UV-resistant polycarbonate, tint options

XMK RV Skylight Replacement is a durable 18" x 26" outer dome designed to fit standard 14" x 22" skylight openings on campers, travel trailers, motorhomes and fifth wheels.

Replace a cracked or yellowed skylight with this lightweight polycarbonate outer dome engineered to resist impact, UV damage and high temperatures. The 18" x 26" outer dimensions provide a broad flange that secures easily to the roof while the internal opening matches common 14" x 22" frames. Available in multiple tints to control glare and heat, this cover brightens interiors while offering weather resistance for long-term outdoor exposure.

How will this skylight improve light and ventilation inside my RV?

The XMK dome admits natural light without the weight and fragility of glass, reducing reliance on interior lighting during daytime. Its UV-resistant coating helps protect fabrics and finishes from sun damage while maintaining visibility to the sky.

• Brings daylight into showers, kitchens and living areas to create a more open feeling.
• Available in clear, white, smoke gray, tawny and dark blue tints to balance brightness and heat control.
• Lets you enjoy a view of the stars at night when paired with an interior hatch or shade.

Will this fit my existing 14" x 22" opening and how does installation work?

The replacement dome is sized to fit standard 14" x 22" skylight openings, with an outer flange measuring 18" x 26" to overlap the roof cutout for secure mounting. Pre-drilled reference holes are provided for correct positioning; you should use a compatible skylight sealant to ensure a watertight installation.

• Inner opening matches typical 14" x 22" frames for direct compatibility.
• Large roof flange offers room to fasten and seal against wind and rain.
• Pre-marked mounting points speed alignment; lightweight material simplifies handling.

How durable is the polycarbonate material and how does it handle weather?

XMK uses a thicker polycarbonate engineered for outdoor use, offering superior impact resistance and heat tolerance compared with thin acrylics. The surface carries a UV protective coating to slow yellowing and reduce interior UV exposure over time.

• Impact-resistant construction reduces risk from road debris and accidental knocks.
• High-temperature tolerance prevents warping in hot climates.
• UV coating protects interior finishes and extends the dome’s clarity lifespan.

Which tint should I choose for my camper?

Select the tint based on your climate and brightness preferences: smoke gray and tawny help reduce solar heat and glare, while clear or white maximize natural light. Dark blue offers a tinted view of the sky while still admitting plenty of daylight.

• Smoke gray: reduces glare and solar heat for warm climates.
• Tawny: filters harsh sunlight while keeping interiors warm and pleasant.
• Clear or white: brightest option for dim interiors or northern climates.
• Dark blue: stylish tint that preserves a blue-sky view without too much brightness.

Who is this for: The XMK 18" x 26" skylight dome is ideal for RV owners, campers and DIY repairers replacing a damaged skylight or upgrading to a lighter, more durable cover. It suits travelers who want a long-lasting, UV-resistant solution that improves interior light distribution while being simple to install and compatible with standard 14" x 22" housings.