RV & Bus Windshield Size and Weight Guide
RV windshield size and weight varies sharply by class. A Class C chassis windshield measures about 59 × 33 inches and weighs 38–48 pounds. A flat Class A half runs about 56 × 40 inches at 70–95 pounds, and a curved diesel-pusher half about 62 × 44 inches at 95–130 pounds. Anything over roughly 50 pounds requires a two-technician set with vacuum cups. Laminated RV windshields are 5–7 mm thick; tempered side glass is 4–6 mm and dual-pane units 20–28 mm overall.
Windshield and window dimensions by platform
Typical values compiled from common North American platforms. Treat these as planning figures — always confirm by measuring the actual panel before ordering glass.
| Platform | Panel | Typical size | Area | Weight |
|---|---|---|---|---|
| Class A diesel pusher (40–45 ft) | Two-piece curved | ~62 × 44 in per half | ~19 sq ft | 95 – 130 lb per half |
| Class A gas (32–37 ft) | Two-piece flat | ~56 × 40 in per half | ~15.5 sq ft | 70 – 95 lb per half |
| Class C on Ford E-450 | One-piece chassis | ~59 × 33 in | ~13.5 sq ft | 38 – 48 lb |
| Class C on Chevy 4500 | One-piece chassis | ~59 × 33 in | ~13.5 sq ft | 38 – 48 lb |
| Class B on Sprinter | One-piece bonded | ~62 × 34 in | ~14.5 sq ft | 42 – 55 lb |
| Class B on Ford Transit | One-piece bonded | ~60 × 33 in | ~13.5 sq ft | 38 – 50 lb |
| Super C on Freightliner M2 | Two-piece flat | ~48 × 34 in per half | ~11 sq ft | 50 – 70 lb per half |
| School bus, Type C | Two-piece flat | ~49 × 30 in per half | ~10 sq ft | 42 – 58 lb per half |
| School bus, Type D transit | Two-piece flat | ~56 × 33 in per half | ~12.5 sq ft | 55 – 72 lb per half |
| MCI motorcoach | Two-piece curved | ~60 × 42 in per half | ~17.5 sq ft | 85 – 115 lb per half |
| Prevost H3-45 | Two-piece curved | ~64 × 44 in per half | ~19.5 sq ft | 100 – 135 lb per half |
| Travel trailer framed slider | Framed tempered | 24–48 in wide typical | 3 – 9 sq ft | 12 – 35 lb |
| Frameless bonded coach window | Frameless tempered | 30–60 in wide typical | 6 – 16 sq ft | 25 – 70 lb |
| Dual-pane insulated coach window | Insulated tempered | 30–60 in wide typical | 6 – 16 sq ft | 45 – 110 lb |
Why RV glass weight matters before you book
Weight is what separates RV glass from car glass operationally. A passenger car windshield weighs 25 to 30 pounds and one technician sets it alone. A curved Class A half can exceed 130 pounds, which requires two technicians, vacuum setting cups, and enough clear ground in front of the coach to stage the panel on a rack.
If a shop quotes a Class A windshield as a one-technician mobile call, that is the signal to keep calling. Single-tech sets on heavy curved glass are how panels get dropped and how urethane beads get compressed unevenly.
- Under 50 lb — single technician, standard mobile setup
- 50 – 90 lb — two technicians or one technician with a setting device
- Over 90 lb — two technicians plus setting cups, mandatory
- Any curved panel — allow 10 ft of clear staging space ahead of the coach
How to measure your RV windshield
Measure the glass, not the fiberglass cap. Take the width at the widest point of the visible glass and the height at the tallest, both in inches, and measure diagonally corner to corner as a third reference — the diagonal is what catches a trapezoidal panel that width and height alone would misidentify.
Then photograph three things: the full front cap straight on, the upper corner where the glass meets the cap, and the lower edge showing whether the panel sits in a rubber gasket or is bonded directly with a urethane bead. Those photos let a specialist confirm the panel before ordering freight-shipped glass that cannot be returned.
- Width at widest point of visible glass
- Height at tallest point of visible glass
- Corner-to-corner diagonal, both directions
- Corner radius, traced onto paper if it is tight
- Thickness at the edge if accessible (typically 5–7 mm laminated)
- Coach make, model, floor plan and model year
How to measure an RV window opening
Framed RV windows are specified by rough opening, measured from inside the coach at the sidewall cutout. Record width first, then height, then the wall thickness — the wall thickness determines the trim ring depth and is the measurement owners forget most often.
Frameless bonded panels are specified by the glass itself, plus the hinge and latch hardware pattern. Photograph the hardware before removing anything; the pattern is often the only way a supplier can match a discontinued panel.
Glass thickness and what it tells you
Laminated RV windshields run 5 to 7 millimeters overall — two glass plies around a PVB interlayer. Tempered RV side glass is typically 4 to 6 millimeters single-pane, and dual-pane insulated units measure 20 to 28 millimeters overall across both panes and the air gap.
Measuring edge thickness with calipers is the fastest way to confirm whether an unlabeled window is single or dual-pane, which changes the replacement price by several hundred dollars.
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Frequently Asked Questions
How much does an RV windshield weigh?
A Class C chassis windshield weighs 38–48 pounds. A flat Class A half weighs 70–95 pounds and a curved diesel-pusher half 95–130 pounds, which is why curved coach glass requires a two-technician set with vacuum cups.
What size is a Class A RV windshield?
Most Class A halves measure roughly 56–64 inches wide by 40–44 inches tall, about 15.5 to 19.5 square feet per side. Exact size varies by coach builder, floor plan and model year, so the panel must be confirmed by measurement.
How thick is RV windshield glass?
RV windshields are laminated at 5 to 7 millimeters total. Tempered RV side windows run 4 to 6 millimeters single-pane, and dual-pane insulated units measure 20 to 28 millimeters overall.
How do I measure an RV window for replacement?
For framed windows, measure the rough opening at the sidewall cutout from inside — width, then height — and record wall thickness. For frameless bonded glass, measure the panel at its widest and tallest points and note the corner radius.
Do I need two people to replace an RV windshield?
Yes for anything over about 50 pounds, which covers every Class A, Super C, bus and motorcoach panel. Only Class B and Class C chassis windshields are a legitimate single-technician job.