Above-Grade Waterproofing for San Francisco Office Towers, Hotels, Hospitals & Apartment Buildings
Commercial Waterproofing Contractors in San Francisco, CA
In San Francisco, water comes at a building from the side. Winter storms arrive on strong southerly winds that drive rain into joints, windows and parapets, and in summer, fog blown in through the Golden Gate soaks walls for hours each day. The air near the bay carries salt that corrodes metal and the steel inside concrete. Because buildings here also flex with seismic activity, sealants and coatings must handle more movement than in most cities.
Presto Restoration has more than 25 years of above-grade commercial waterproofing experience across the country. In San Francisco we reseal expansion joints and window perimeters, wet glaze aging curtain walls, coat parapets, ledges and setbacks and treat masonry and concrete with breathable repellents on office towers, hotels, hospitals, university buildings and apartment buildings. We also manufacture our own restoration products, such as Glass Defender for glass and Leach Stop for precast concrete.
OUR COMMERCIAL WATERPROOFING SERVICES IN SAN FRANCISCO
From a single leaking bay window to a full envelope program on a downtown tower, we cover every kind of above-grade waterproofing on San Francisco commercial buildings.
Core Waterproofing Services
Expansion, control and seismic joints let a San Francisco building move without cracking. When the sealant tears, rain runs straight into the structure. We remove failed material, repair joint edges and install sealants or preformed systems rated for the movement, and we rout and seal active cracks.
Window perimeters and bay windows are among the most common leak points in San Francisco, especially on walls facing the prevailing wind. We replace perimeter sealant, reseal mullions and repair gaskets, and fogged or stained glass can be restored and protected with Glass Defender.
Parapets, ledges, setbacks and cornices collect wind-driven rain and stay damp in the fog. We coat them with high-solids silicone systems that resist standing water, UV and salt.
Many San Francisco towers from the 1960s through the 1980s still rely on their original dry gaskets, which harden and shrink with age. Wet glazing adds a continuous silicone seal between glass and frame, stopping leaks without replacing the curtain wall.
Concrete and stucco walls crack with seismic movement and settling, and fog and rain find those cracks quickly. Elastomeric coatings bridge hairline cracks and flex with the wall. We repair larger cracks first, then apply the coating at full thickness.
Brick, stone, concrete and precast soak up rain and fog, which speeds anchor corrosion and staining. Breathable water repellents reduce that absorption while letting moisture already in the wall escape, applied after repairs are complete.
Specialized Restoration-Waterproofing
Waterproofing works best alongside surface restoration. Presto also restores the glass, metal, stone and concrete under the seal with products we make in-house, so everything is handled in one project.
Precast panels can leach salts that leave white streaks as water dries, and San Francisco’s damp climate keeps that cycle going. Leach Stop is our treatment designed to reduce this. We clean off deposits, treat the panels and reseal the joints.
Metal panels, Alucobond cladding, copings and curtain wall frames depend on sealant at every seam, and salt air attacks both metal and seal. We replace failed sealants with products suited to metal and coastal exposure and reseal laps and fasteners.
Our Commercial Waterproofing Process in San Francisco
Every San Francisco waterproofing project follows five steps, and you see what we found and what it will cost first.
Building Envelope Inspection
We check joints, glazing, parapets, flashings and penetrations on every elevation.
Diagnostic Testing
Water testing and moisture readings confirm where water is entering.
Scope & Specification
We choose systems rated for movement, salt air and constant moisture and write a clear scope.
Waterproofing Installation
Crews install each system to manufacturer requirements, timing coatings around fog and rain.
Project Closeout & Warranty
You receive photos, product data and warranty records.
Talk to Presto About Waterproofing Your San Francisco Building
Leaks during winter storms, damp walls or caulking that has pulled away? Call us or request a quote, and our team will respond to discuss your San Francisco building.
Why San Francisco Property Managers Choose Presto for Commercial Waterproofing
Presto brings more than 25 years of experience from markets nationwide, and we know which sealants hold up to fog, salt and seismic movement and how to work around tenants on tight city sites.
Our Local San Francisco, CA Support Network
A sealed building stays dry longer with regular inspections and small repairs. Presto connects San Francisco owners with a local support network for everyday upkeep.
For routine upkeep and everyday facility support, owners can also contact our sister companies:
Building Restoration San Francisco: Hands-on exterior repairs for San Francisco buildings.
Building Maintenance San Francisco: Routine maintenance that catches leaks early.
Building Services San Francisco: General commercial building support throughout the Bay Area.
Recent Restoration Projects in California
CALIFORNIA PORTFOLIO HIGHLIGHTS
View Presto’s glass, stone and facade work across California.
San Francisco Commercial Waterproofing FAQs
How often should sealants be replaced on a San Francisco building?
Most joints last 10 to 15 years, and less on walls facing the ocean wind or on joints that see a lot of building movement.
What is the difference between waterproofing and water damage repair?
Waterproofing stops water at the exterior. Water damage repair fixes interior finishes afterward. We stop the water first so interior work only has to be done once.
Can waterproofing be done while the building is occupied?
Yes. The work is done from outside, and we schedule around tenants, guests and building operations.
What is the difference between elastomeric coatings and water repellents?
An elastomeric coating is a flexible film that bridges cracks and changes the wall’s look. A water repellent soaks into masonry and blocks water without changing its appearance. Historic brick and terra cotta usually need breathable treatments.
How do I know if waterproofing can wait another year?
Leaks during storms, damp or stained walls or split caulking mean it should not wait. If sealants are still flexible and nothing is leaking, planned replacement over the next few years is usually reasonable.
When is the best time for waterproofing work in San Francisco?
Late spring through fall, so the building is sealed before the winter storms. We plan coating work around fog and morning dampness.
Other San Francisco Building Restoration Services
Keep Water Out of Your San Francisco Building
One failed joint can let a winter storm soak an entire floor. Tell us what you are noticing, and we will help you get it sealed.
Call us today at 1-800-785-9927 or click Request A Quote.