Quick Answer:
EPRO storm shelter coating is a water-resistant protective layer applied by our manufacturer to all below-ground storm shelters before they leave the shop. This coating is included at no extra cost and helps protect exterior concrete walls from soil moisture. It is water-resistant, not waterproof, and does not prevent normal condensation inside underground shelters.
When Oklahoma families invest in a below-ground storm shelter, they want protection that lasts. That’s why every below-ground shelter we install comes from the manufacturer with EPRO coating already applied to the exterior walls.
This protective membrane adds an extra layer of moisture resistance between the concrete structure and the surrounding soil. Understanding what EPRO coating does — and what it does not do — helps set realistic expectations for underground storm shelter ownership.
What Is EPRO Storm Shelter Coating?
EPRO coating is a specialized water-resistant membrane applied to the exterior walls of below-ground storm shelters during the manufacturing process. It is installed before the unit ever arrives at your property.
This means families receive this added protection automatically. There are no upgrade tiers, add-ons, or additional charges for EPRO coating on below-ground models.
Concrete is naturally porous. Over time, untreated concrete can absorb moisture from surrounding soil. EPRO coating provides an added protective barrier designed specifically for underground structures.
Benefits of EPRO Coating
- Enhanced moisture resistance: Helps reduce water infiltration through concrete walls compared to uncoated surfaces.
- Exterior protection: Adds a protective layer between soil moisture and the concrete structure.
- Included as standard: Comes pre-applied by the manufacturer on all below-ground models at no additional cost.
- Long-term durability: Designed to provide ongoing protection when properly manufactured and installed.
This coating works alongside proper installation techniques and site drainage considerations to help maintain long-term structural integrity.
Important: Water-Resistant vs. Waterproof
EPRO coating is water-resistant, not waterproof.
No exterior membrane can make an underground concrete structure completely waterproof. Underground environments naturally experience moisture exposure.
EPRO coating significantly reduces moisture intrusion from surrounding soil, but it does not eliminate all humidity or condensation.
Condensation in Below-Ground Storm Shelters
Condensation inside a below-ground storm shelter is normal, especially in new installations.
EPRO coating protects against exterior soil moisture. It does not prevent condensation caused by temperature differences and humidity levels inside the shelter.
New concrete can take months to fully cure. During this curing period, some condensation is expected and does not indicate a defect or failure.
Drainage Still Matters
Even with exterior coating, proper drainage and correct installation remain critical.
Site slope, soil composition, and water runoff patterns all affect underground moisture levels. The coating works best when combined with proper placement and installation practices.
Installation Timeline
EPRO coating is applied at the manufacturer’s facility before the shelter is delivered.
Typically, our below-ground storm shelter installations in central Oklahoma take approximately 3–4 hours, depending on site access and soil conditions.
Because the coating is pre-applied, homeowners do not need to schedule additional contractors or appointments.
Frequently Asked Questions
Is EPRO coating waterproof?
No, EPRO coating is water-resistant, not waterproof. Concrete is naturally porous and cannot be made completely waterproof. EPRO coating significantly reduces water infiltration but cannot eliminate all moisture in underground structures.
Do all of your below-ground shelters include EPRO coating?
Yes, every below ground storm shelter installed by Sprague’s Backhoe includes EPRO coating at no additional cost. This protection is standard equipment, not an optional upgrade.
Does EPRO coating cost extra?
No, EPRO coating is included with every below ground storm shelter installation at no additional charge.
Will EPRO coating prevent condensation in my shelter?
EPRO coating helps reduce moisture infiltration from outside your underground storm shelter, but it cannot prevent condensation that forms inside from temperature and humidity differences. Some condensation is normal in underground structures, especially during the first months after installation.
Can EPRO coating be added later?
No. It must be applied to the exterior walls during manufacturing before the shelter is installed and backfilled.
Do these shelters still meet FEMA guidelines?
Yes. Our below-ground storm shelters are designed to meet and exceed FEMA guidelines for residential storm protection. The EPRO coating does not affect structural performance — it simply adds exterior moisture resistance.
Key Takeaways
EPRO coating is a manufacturer-applied, water-resistant membrane included on all below-ground storm shelters at no additional cost.
It helps reduce moisture intrusion from surrounding soil but does not make a shelter waterproof or eliminate normal condensation.
When combined with proper installation and drainage considerations, this added layer of protection supports long-term performance in Oklahoma soil conditions.
Ready to protect your family with a below-ground storm shelter?
We serve families throughout central Oklahoma, typically within a ~60-mile radius of Blanchard. Contact Sprague’s Backhoe today to review your property and discuss placement options.
