Winter presents unique challenges for commercial buildings. Cold temperatures, moisture, and fluctuating indoor conditions can stress your masonry, damage interior finishes, and compromise waterproofing systems. While exterior maintenance is often prioritized, focusing on the interior is equally critical to prevent costly repairs and maintain energy efficiency.
Contact ESI Waterproofing & Masonry Restoration, Inc. today to have our professionals inspect, advise and provide a free estimate!
1. Inspect Interior Walls and Masonry Surfaces
Even when the exterior looks fine, interior walls can reveal early signs of damage:
- Efflorescence: White, powdery deposits indicate water migrating through masonry.
- Cracks or spalling: Hairline cracks can expand with freeze-thaw cycles.
- Moisture stains or peeling paint: Signs of hidden water intrusion.
Early detection allows property managers to address small issues before they turn into expensive repairs.
2. Seal Gaps Around Penetrations and Utilities
Interior gaps and openings can let cold air and moisture infiltrate your building, increasing heating costs and stressing masonry.
Areas to check:
- HVAC penetrations
- Electrical chases
- Plumbing lines
- Elevator shafts and mechanical rooms
Sealing these properly enhances energy efficiency and prevents interior water damage.
3. Check Basements and Lower Levels
Basements and sub-level areas are most susceptible to winter water intrusion.
Key steps:
- Inspect foundation walls for dampness or spalling
- Test sump pumps and drainage systems
- Monitor cracks for widening
- Watch for signs of hydrostatic pressure
Addressing issues early protects both the foundation and interior spaces from long-term damage.
4. Test Interior Waterproofing Systems
Interior waterproofing protects your property when exterior access is limited or older buildings are concerned.
Focus on:
- Interior negative-side coatings
- Vapor barriers and membranes
- Drainage mats or interior French drains
- Elevator pits and mechanical room waterproofing
Ensuring these systems are intact prevents water intrusion and protects interior masonry.
5. Manage Indoor Humidity and Ventilation
High indoor humidity can cause condensation, leading to mold growth and masonry deterioration.
- Ideal indoor humidity: 30–50%
- Monitor boiler rooms, kitchens, gyms, and storage areas
- Consider dehumidifiers or improved ventilation in problem areas
Controlling moisture protects walls, finishes, and building occupants’ comfort.
6. Inspect Windows, Doors, and Sealants
Interior drafts and failing seals can compromise insulation and promote condensation.
- Check caulking around window and door frames
- Inspect gaskets and weather stripping
- Replace deteriorated sealants to prevent cold air and moisture infiltration
7. Address Freeze-Thaw Vulnerabilities
Interior masonry in unheated areas such as stairwells, basements, and loading docks can suffer freeze-thaw damage.
- Look for spalling or cracked brick and block
- Repair mortar joints where needed
- Apply breathable sealers to prevent moisture penetration
8. Maintain Interior Drainage and Waterproofed Areas
Snow and ice tracked indoors can melt and find its way into cracks or floor joints.
- Clean floor drains and trench systems
- Inspect expansion joints and slab coatings
- Maintain waterproofing around loading docks and high-traffic areas
Proper maintenance ensures water does not compromise masonry or flooring systems.
Protect Your Property with Interior Winter Maintenance
Proactive interior maintenance saves money and prevents operational disruptions. Regular inspections, sealing gaps, managing moisture, and maintaining drainage systems protect both the structural integrity and energy efficiency of your commercial building.
Partnering with ESI’s experts ensures your property is prepared for winter and beyond.