Interior ceiling piece — installs from inside the RV. White polycarbonate throughout. Fits 18"×18" ceiling openings. 20"×20" outer flange. 3.5" bubble height. Made in the USA.
The N1818 is an inner garnish — it installs on the interior ceiling of your RV to finish the inside of an 18"×18" skylight opening. It is not a roof-mounted outer dome. No roof access is required for installation. If you need the exterior roof-mounted dome for an 18"×18" opening, order a matching outer skylight separately.
The Specialty Recreation N1818 is a white interior ceiling garnish for RVs with 18"×18" square ceiling openings. At 3.5" bubble height this is the lowest-profile inner garnish in the Specialty Recreation lineup — making it well suited to RVs with minimal ceiling-to-roof clearance where taller domes would not fit. White polycarbonate throughout gives a uniform, clean appearance from inside the coach.
The 20"×20" flange sits flat against the ceiling surface with a 1" overlap on all sides of the 18"×18" opening. At just 3.5 lbs it is also the lightest inner garnish in the session. Smooth glossed surface is easy to clean from inside the coach.
Installs from inside the RV — no roof access needed. Replaces the interior dome visible from inside the coach
Uniform white polycarbonate — consistent appearance at both the ceiling flange and dome
Lowest profile inner dome in the lineup — suited to tight ceiling-to-roof clearances where taller domes won't fit
Specialty Recreation manufactures their skylights domestically — 1-year warranty
Unlike outer dome skylights, inner garnishes must match the ceiling hole size exactly. This skylight fits an 18"×18" square ceiling opening only. Measure your ceiling opening carefully before ordering — do not confuse with the common 14"×14" or 22"×22" square sizes.
The Specialty Recreation Inc. product warranty covers defects in workmanship and materials for 1 year from the date of purchase. Warranty does not apply to damage caused by improper installation. Note: Some product listings reference a 90-day warranty term; Specialty Recreation's published warranty policy is 1 year.
• (1) N1818 White Square Inner Garnish NOT Included: • Sealant • Mounting hardware/screws • Exterior outer dome (sold separately if needed)
Interior Only: Installs from inside the RV — no roof access required. Hole Size Must Match Exactly: Ceiling opening must be exactly 18"×18" — do not confuse with 14"×14" or 22"×22" square sizes. Check Clearance: Verify the ceiling-to-roof gap accommodates the 3.5" bubble height before ordering. No Sealant Included: If sealant is needed, use only a polycarbonate-compatible product — do not use self-leveling lap sealant.
N2222 — White inner garnish, 22"×22" opening, 4" bubble N2222D — White frame + clear bubble, 22"×22" opening, 6" bubble Measure your opening carefully — 18"×18", 14"×14", and 22"×22" are three distinct sizes that cannot be substituted for each other.