XMK RV Skylight Outer Dome 18" x 26" for 14" x 22" Opening — Impact‑Resistant Polycarbonate, UV Coated

XMK’s 18" x 26" outer dome is a durable polycarbonate skylight cover designed to replace standard 14" x 22" RV openings for brighter, weather‑resistant cabin light.

This replacement outer dome fits the common 14" x 22" roof opening found in many RVs, campers, motorhomes and travel trailers. Built from thicker polycarbonate with a UV‑protective coating, the cover lets daylight in while resisting impact, high temperatures and outdoor wear. It arrives pre‑drilled for straightforward mounting and is available in five tints so you can balance light and heat control for your interior.

How does this skylight cover stand up to wind, rain and road vibration?

The XMK outer dome uses a larger 18" x 26" flange that provides ample surface area to seat against the roof and roofing flange, improving stability in windy conditions. The sturdier polycarbonate construction resists cracking and impact from road debris and handling during installation.

• 18" x 26" outer flange for secure mounting over 14" x 22" openings
• Thick, impact‑resistant polycarbonate for long outdoor life
• Pre‑drilled mounting pattern to speed installation and alignment
• UV coating to reduce material degradation from sunlight

Will this skylight help reduce heat and still let in natural light?

Yes — the cover is offered in five tints (clear, white, smoke gray, tawny and dark blue) so you can choose how much light and heat transfer you allow. Darker tints filter more solar radiation and glare, while clear and white let the most daylight into the cabin.

• Clear and white maximize interior brightness
• Smoke gray and tawny reduce solar heat and glare
• Dark blue provides a tinted view of the sky with reduced brightness
• UV coating helps protect interior surfaces from fading

How easy is it to install and what tools or materials will I need?

The dome is lightweight compared with glass and comes pre‑drilled so it can be aligned quickly on the roof flange. For a reliable, watertight result you should use a quality skylight sealant and basic hand tools; many owners complete the swap in under an hour with a helper.

• Pre‑drilled holes reduce measuring and drilling during fitment
• Recommended tools: drill/driver, sealant gun, screwdriver and caulk
• Use RV‑rated skylight sealant to prevent leaks and air drafts
• Lightweight design makes two‑person handling easy and safer than glass

What maintenance and lifespan can I expect from this polycarbonate dome?

With its UV protective coating and durable material, the dome is designed for long outdoor exposure with minimal upkeep. Periodic cleaning with mild soap and water and checking the sealant around the flange will keep the skylight performing and looking good for years.

• Wipe with mild soap and water; avoid abrasive cleaners
• Inspect seals annually and reapply skylight sealant as needed
• UV coating slows yellowing and surface degradation
• Resists cracks and impact better than glass in typical use

Who is this product for: RV owners, renovators and DIYers looking to replace a 14" x 22" skylight opening with a tougher, lighter alternative. It’s ideal for anyone who wants more natural light, a choice of tint levels to control heat and glare, and a straightforward, serviceable option that fits most standard RV roof flanges.