Fifth Wheel Window Replacement

Fifth wheel window replacement costs $250–$900 per window installed. The large front-cap windows above the hitch are the most expensive at $500–$900 because they are curved to the cap profile and brand-specific, while standard side and slide-room windows are commodity framed units at $250–$500. Most fifth wheel glass work is done on site since the coach is rarely towable to a shop mid-repair.

Dual-pane RV side window on a white travel trailer showing a failed thermal seal between the glass panes — A dual-pane RV window that has lost its thermal seal: the haze sits between the panes, so cleaning the surfaces changes nothing — the insulated unit has to be rebuilt or replaced.Photo: RV Glass Directory

Glass type: Framed tempered glass; curved front-cap panoramic units
Typical cost: $250 – $900 per window installed
Lead time: 5 – 25 business days
Mobile service: Yes — preferred, since the trailer stays parked

Common fifth wheel examples

Grand Design SolitudeKeystone MontanaJayco EagleAlliance Paradigm

Front-cap glass is the expensive one

The panoramic front windows on a fifth wheel follow the curve of the molded front cap, which means the unit is specific to the brand, model line, and often the model year. Grand Design, Montana, and Alliance front-cap glass all differ. When a unit is discontinued, a fabricator can cut a replacement pane to a template, but budget an extra 2–4 weeks.

Standard side window: $250 – $450 installed
Slide-room window: $300 – $550 installed
Large panoramic front-cap window: $500 – $900 installed
Custom-templated pane for discontinued cap: add $250 – $600
Reseal only (no glass): $150 – $350

Slide-room windows and flex

Windows in a slide room live in a wall that moves. Repeated extension and retraction flexes the frame, which is why slide-room windows crack and lose seals earlier than fixed-wall units. Before replacing one, have the installer check the slide's alignment and seals — a slide out of square will crack the next window too.

Booking mobile service

Because a fifth wheel is usually sitting on jacks at a site or in storage, mobile is the default. The tech needs about eight feet of clear working space alongside the affected wall and a level pad. Most jobs are done in 60–120 minutes per window.

Fifth Wheel glass FAQs

How much is a fifth wheel front window?

$500–$900 installed for a curved front-cap panoramic unit; discontinued caps needing a templated pane can add $250–$600.

Why do my slide-room windows keep cracking?

A slide that is out of square flexes the window frame every cycle. Fix the slide alignment before installing new glass.

Can a fifth wheel window be replaced on site?

Yes — mobile service is standard for fifth wheels since they're usually parked and jacked at a site.

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