XMK RV Outer Dome Skylight 18"x26" for 14"x22" Opening — Polycarbonate, UV‑Coated & Impact‑Resistant

XMK's 18" x 26" outer dome is a durable polycarbonate replacement skylight designed to fit standard 14" x 22" RV openings and bring long-lasting daylight and weather protection to your camper.

This skylight replacement by XMK is an aftermarket outer dome built to cover most 14" x 22" roof openings found in trailers, motorhomes, fifth wheels and campers. Constructed from thicker polycarbonate with a UV protective coating, it balances light transmission with weather resistance and impact strength. The product ships with pre‑drilled mounting guidance, comes in multiple colors and sizes, and is intended for DIY roof repairs or upgrades.

Will this dome fit my RV opening?

Yes — the XMK outer dome measures 18" x 26" overall and is shaped to cover a 14" x 22" interior flange opening. The wider roof flange gives room for a secure seal and helps the dome overlap the original cutout for stronger weather protection.

• Outer dimensions: 18" x 26" for roof overlap
• Inner coverage designed for 14" x 22" openings
• Pre‑drilled hole layout to guide mounting fasteners
• Flange depth ~4" for stable roof attachment

How durable is the XMK skylight in wind and sun?

The dome is molded from thicker polycarbonate that resists impacts and high temperatures better than thin plastic. A dedicated UV coating protects the surface and reduces UV transmission, helping maintain interior materials and keeping the dome clearer over years of outdoor exposure.

• Thicker polycarbonate material for impact resistance
• UV protective coating to slow discoloration and degradation
• Engineered flange area to stand up to wind uplift
• Rated for outdoor RV use in varied climates

How much light and heat will this skylight let into my RV?

XMK offers six color choices so you can select the balance of daylight and heat control you prefer. Clear and white domes maximize natural light, while smoke, tawny, black, and dark blue reduce direct sunlight and help filter solar heat without plunging interiors into darkness.

• Clear/white: brightest interior light, ideal for darker rigs
• Smoke/tawny/black: reduces glare and filters heat
• Dark blue: preserves a sky view with moderate shading
• Color selection allows thermal and visual control

Is installation complicated — what tools and steps are needed?

Installation is straightforward for a basic DIYer; the dome is lighter than glass and includes pre‑drilled guidance for mounting. For a reliable weatherproof seal, use an RV‑grade skylight sealant and follow standard roof fastening practices. If you’re unsure, a roof technician can install it quickly.

• Pre‑drilled holes reduce layout time and drilling errors
• Use RV skylight sealant to prevent leaks and drafts
• Lighter weight reduces risk during lifting and placement
• Professional install recommended for complex roof profiles

Who this is for: RV owners, renovators and repair shops looking for a robust outer dome to replace weathered or cracked skylight covers. It suits travelers who want more natural light without sacrificing weather protection, and DIYers seeking a relatively easy upgrade with multiple color options to match interior needs. Choose the correct inner opening size and color to optimize brightness and thermal comfort for your rig.