Bloomington, IL winters are among the most demanding storage environments for boats and RVs in the Midwest — and the owners who prepare properly before storing protect investments that can cost tens of thousands of dollars from damage that a few hours of preparation would have prevented entirely.
Illinois gives Bloomington boat and RV owners some of the best outdoor recreation opportunities in the Midwest — and some of the most demanding storage conditions when the season ends. Sub-zero winter temperatures cause water left in engines, plumbing systems, and tanks to freeze and expand with enough force to crack engine blocks, burst pipes, damage fittings, and destroy freshwater systems that cost thousands of dollars to repair or replace. Freezing temperatures combined with moisture cause battery failure, rubber seal and gasket deterioration, and accelerated corrosion in metal components. A boat or RV stored without proper winterization in an Illinois winter is almost certain to come out of storage damaged — and the repair bills for freeze damage routinely reach into the thousands of dollars on vessels and vehicles that a few hours of proper preparation would have protected completely. A storage unit at TGI Storage Bloomington gives your boat or RV a secure accessible home through the off-season — and this guide covers everything you need to do before it goes in.
Engine winterization: Flush the engine thoroughly with fresh water to remove any lake or river sediment. Change the oil and filter — used oil contains combustion acids that corrode engine internals during long storage periods. Add fuel stabilizer to the tank and run the engine long enough to circulate stabilizer through the fuel system. Fog the engine cylinders with fogging oil to prevent corrosion on cylinder walls during the storage period. Water system winterization: Drain every water system completely — bilge, livewell, baitwells, freshwater tanks, and any plumbing. Use compressed air to blow out any remaining water from lines and fittings. For boats with freshwater systems use non-toxic RV antifreeze to protect any lines that cannot be fully drained. Battery care: Remove batteries and store in a climate-controlled environment if possible. Connect to a battery maintainer or trickle charger throughout the storage period — a battery left uncharged in a cold environment permanently loses capacity. Exterior and cover: Clean and wax the hull. Use a properly fitted cover that breathes rather than traps moisture — a sealed impermeable cover can create more moisture damage than no cover at all by trapping humidity against surfaces.
Freshwater system: Drain the freshwater tank completely. Open all faucets — hot and cold — to drain the lines fully. Flush and drain the water heater. Use an RV water pump to push non-toxic RV antifreeze through the entire plumbing system until pink antifreeze flows from every faucet and showerhead. Do not use automotive antifreeze — it is toxic and inappropriate for RV freshwater systems. Flush the toilet until antifreeze appears. Black and grey tanks: Empty and flush both tanks thoroughly at a dump station before storage. Add a small amount of RV antifreeze and tank treatment to prevent any residual moisture from freezing and cracking the tank. Engine and mechanical: Change the oil and filter. Check and top all fluids. Add fuel stabilizer to the tank and run the engine to circulate it. Inflate tires to the recommended storage pressure and place the RV on tire cradles or boards if storing on pavement for extended periods to prevent flat-spotting. Interior preparation: Remove all food — rodents actively seek food sources in stored RVs. Clean the refrigerator and leave the door propped open to prevent mildew. Remove or protect all valuables. Place moisture absorbers inside to control interior humidity during storage.
Boat and RV storage space requirements vary significantly by vessel and vehicle size — and getting the right space size from the start prevents the frustration of discovering the unit is too small after you have already towed your boat or driven your RV to the facility. Small to mid-size boats on trailers — runabouts, fishing boats, ski boats under 20 feet — typically fit in a 10x20 or 10x25 space with room to walk alongside for maintenance access. Larger boats over 20 feet on trailers typically need a 12x30 or larger. Class C motorhomes and mid-size travel trailers typically need a 12x30 to 12x35. Class A motorhomes — typically 30 to 45 feet in length — need a 12x45 or larger depending on the specific vehicle length. Call TGI Storage Bloomington at (309) 490-9100 with your boat or RV's dimensions and we will confirm the right space before you make the drive to bring it in.
TGI Storage Bloomington offers secure, accessible, and flexible boat and RV storage in Bloomington, IL — the right off-season home for your recreational investment through every Illinois season. Call us at (309) 490-9100 with your boat or RV dimensions to confirm available space and pricing before the season ends. Your boat or RV represents a major investment — protect it properly. Call (309) 490-9100 today.