Why the Undercarriage Matters More Than the Paint
Most people think of car washing as keeping their paint clean. But in New Hampshire, the most serious threat to your vehicle is not visible from the outside — it is happening underneath.
Your vehicle's undercarriage includes the frame, subframe, exhaust system, fuel lines, brake lines, suspension components, and floor pan. All of these are metal. All of them are exposed to road spray every time you drive. And in New Hampshire, that road spray carries road salt from November through March.
Salt-induced rust on your frame is structural. It can cause a vehicle to fail its safety inspection, require expensive repairs, and in severe cases make the vehicle unsafe to drive. Unlike surface rust on a body panel, frame rust cannot simply be painted over.
How an Underbody Blast Works
As your vehicle moves through the touchless automatic bay, a series of high-pressure nozzles mounted in the floor activate and spray upward at high pressure — typically 1,000–1,500 PSI — targeting the undercarriage directly.
The water jets are positioned to hit:
- Frame rails — the main structural members running the length of your vehicle
- Wheel wells — where salt-laden slush packs in and melts slowly against metal surfaces
- Suspension components — control arms, tie rods, and sway bars that are constantly exposed to road spray
- Exhaust system — exhaust components run the full length of the undercarriage and are heavily exposed to salt
- Floor pan — the underside of your vehicle's floor
New Hampshire fact: NH DOT applies millions of pounds of road salt per winter season across state highways and secondary roads. Vehicles in NH can show significant undercarriage rust up to five years sooner than identical vehicles driven in dry climates — purely from road salt exposure.
What an Underbody Blast Cannot Do
It is important to understand that an underbody blast removes loose and dissolved salt from accessible surfaces — it does not reach into sealed cavities, box sections, or areas with no water access. For comprehensive underbody protection, some vehicle owners also apply cavity wax or rust inhibitor to enclosed structural sections annually. An underbody blast through the car wash is the minimum regular maintenance — additional rustproofing is supplemental protection for high-value vehicles or those kept long-term.
How Often Should You Use Underbody Blast in NH?
Every wash during winter months — and especially:
- Within 24–48 hours after driving during or after a storm on treated roads
- After any drive on heavily salted highways
- At the end of winter season as a final flush of accumulated salt
- After driving on unpaved or gravel roads that have been treated
Village Car Wash's touchless automatic bay at 26 Elm Street in Farmington, NH includes underbody blast on all membership plans — Express, Gold, and Platinum. At $22–34/month for unlimited washes, it is one of the most cost-effective ways to protect your vehicle from NH winter road salt.
Underbody Blast Included in Our Automatic Bay
Village Car Wash's touchless automatic bay includes underbody blast on all membership plans. Open 24 hours at 26 Elm Street, Farmington NH.
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