What is the best door configuration for a 3-bay garage used for RV storage in NB?

For RV storage in New Brunswick, you'll want one oversized door (12-14 feet wide by 10-12 feet tall) for the RV bay, plus a standard 8-9 foot door for the remaining vehicle bay. This configuration provides the clearance needed for most RVs while maintaining flexibility for regular vehicles and equipment storage.

RV Door Sizing Requirements

Most travel trailers and Class C motorhomes require 12-14 feet of width and 10-11 feet of height for comfortable entry and exit. Measure your specific RV with mirrors extended and any roof accessories (air conditioning units, antennas, solar panels) to determine exact clearance needs. Add 12-18 inches to your measurements for maneuvering room — backing a large RV through a garage door opening requires more precision than a car, especially in winter conditions when visibility may be reduced.

The door height is often the limiting factor for RV storage. Standard residential garage doors are 7-8 feet tall, which works for cars and trucks but not RVs. A 10-foot tall door accommodates most travel trailers, while 12 feet handles larger Class C motorhomes. Some Class A motorhomes require 13-14 feet of height, pushing into commercial door territory with significantly higher costs.

Structural Considerations for NB

Large garage door openings require engineered headers to carry the roof load across the span. In New Brunswick's snow load conditions (2.4-4.8 kPa depending on location), a 14-foot opening typically needs a substantial LVL beam or steel header. Your contractor will need to calculate the exact size based on your roof design and local snow loads, but expect a header that's 11-7/8 inches to 14 inches deep for spans this wide.

The foundation and floor slab must also accommodate RV weight. Most travel trailers weigh 6,000-12,000 pounds loaded, while Class C motorhomes range from 10,000-25,000 pounds. A standard 4-inch residential garage slab may be adequate for lighter RVs, but heavier units benefit from a 5-6 inch slab with additional reinforcement. The approach to the garage should be graded carefully to avoid scraping the RV's rear overhang on the transition from driveway to garage floor.

Door Configuration Options

Option 1: 14' + 8' + 8' doors gives you maximum flexibility with three separate openings. The RV gets the wide door, and you have two standard bays for vehicles, ATVs, or workshop space. This configuration costs more upfront ($8,000-$12,000 for three doors vs. $6,000-$9,000 for two) but provides the most versatility.

Option 2: 14' + 16' doors combines the RV door with a double-wide door for the remaining space. This works well if you want to store two vehicles side-by-side in the non-RV area, or if you need the full width for boat storage, workshop space, or equipment. The 16-foot door costs more than two 8-foot doors but creates an unobstructed opening.

Option 3: Single 24-foot door spanning the entire garage creates maximum flexibility but costs significantly more ($4,000-$7,000 for a single 24-foot door vs. $3,000-$5,000 for separate doors) and requires a very substantial header beam. This approach works best for commercial-style buildings rather than residential garages.

Insulation and Climate Control

If you plan to winterize your RV inside the garage, insulation becomes important. An unheated garage protects the RV from snow and ice but may still drop below freezing during NB's coldest periods. For true winter protection, you'll need wall and ceiling insulation (R-20+ walls, R-32+ ceiling) plus heating. A heated garage allows you to perform maintenance, access the RV comfortably, and prevents any residual moisture in tanks or lines from freezing.

Ventilation is critical in any garage storing RVs, especially if you'll run the engine for maintenance or warm-up. RV engines produce significant exhaust volume, and propane appliances in the RV create additional ventilation needs. Install either a large exhaust fan (minimum 1,000 CFM for RV storage) or ensure adequate cross-ventilation with intake and exhaust openings.

Practical Planning Tips

Measure twice, build once — RV dimensions vary significantly even within the same class. Verify your RV's height with air conditioning units extended, width with mirrors and slide-outs retracted, and length including any rear-mounted accessories. Plan for your next RV too, as many owners upgrade to larger units over time.

Consider the approach angle — RVs have longer overhangs than cars, so the transition from driveway to garage floor must be gradual. A steep approach can cause the rear of the RV to scrape or get hung up on the garage threshold.

Plan electrical accordingly — RV storage benefits from 30-amp or 50-amp RV outlets for battery maintenance and block heater connections. Include adequate lighting for the larger space and consider 240V outlets for RV air conditioning if you'll use the unit while parked.

When to Hire a Professional

RV garage construction requires professional engineering for the large door headers and potentially the foundation design for heavy motorhomes. The electrical work, especially high-amperage RV outlets, requires a licensed electrician. While the basic framing follows standard practices, the structural calculations for wide spans under NB snow loads should be done by a qualified engineer or experienced contractor familiar with large garage door installations.

Need help finding a professional garage builder experienced with RV storage? New Brunswick Garages can match you with contractors who understand the structural and practical requirements for RV garages in our Maritime climate.