Inside Rectangular Skylights

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15 products

What size opening do inside rectangular RV skylights fit?

Most inside rectangular skylights in this collection are sized to fit standard RV roof cutouts paired with an outer dome, typically 14" x 22", 16" x 24", or 22" x 34" rough openings. Measure the inside dimensions of your existing skylight frame from edge to edge before ordering, and confirm the outer dome dimensions if you are replacing both halves. If you need a different shape, see our inside square skylights collection.

Can I replace just the inner skylight without replacing the outer dome?

Yes, in most cases the inner skylight can be replaced on its own if the outer dome is still intact and watertight. The inner panel handles light diffusion and interior finish, while the outer dome handles weatherproofing. If both are cracked, yellowed, or leaking, replace them together. For full skylight assemblies and brand-specific replacements, see our Specialty Recreation skylights collection.

How do I install an inside rectangular skylight?

Installation is straightforward: remove the trim ring or screws holding the existing inner skylight, drop the old panel out, set the new rectangular skylight into the same frame, and reinstall the trim and screws. No sealant is required on the interior side since weatherproofing happens at the outer dome. Confirm your model number and opening size before ordering to make sure you get the correct fit.

What material are these inner skylights made from?

Inner rectangular skylights are typically molded from impact-resistant acrylic or polycarbonate with a smoked, white, or clear finish that diffuses sunlight while reducing glare and UV transmission into the cabin. Both materials hold up well to temperature swings and resist yellowing better than the original panels on older RVs. For related roof ventilation upgrades, see our Hengs vent accessories collection.

Do inside rectangular skylights ship for free?

Orders over $100 ship free within the contiguous U.S. Smaller skylight panels typically ship via standard ground freight and arrive in 3 to 7 business days. Need help confirming fitment before you order? Our team at United RV Parts is here to help, text or call 817-984-1852.