Above-Grade Waterproofing for Washington, D.C. Office Buildings, Hotels, Campuses & Historic Properties
Commercial Waterproofing Contractors in Washington, D.C.
Because D.C. buildings cannot grow tall, owners make the most of every roof. Rooftop penthouses, terraces and green roofs are everywhere, many of them encouraged by the city’s stormwater rules, and every one of them depends on a membrane that ties into parapets, penthouse walls and drains. Down the wide stone facades, panel joints and window perimeters take the brunt of summer thunderstorms and the meltwater of winter snow. When any of those details fail, water finds its way into ceilings, walls and the floors below.
Presto Restoration brings more than 25 years of above-grade commercial waterproofing experience to Washington, D.C. Our crews reseal stone panel and expansion joints, replace window and curtain wall perimeter seals, wet glaze older window systems, seal parapets, terraces and penthouse transitions and treat limestone, marble and brick with breathable repellents on office buildings, hotels, campuses and historic properties. We also manufacture our own restoration products, including Glass Defender for glass and Leach Stop for precast concrete.
OUR COMMERCIAL WATERPROOFING SERVICES IN WASHINGTON, D.C.
Our D.C. work ranges from sealing one rooftop terrace that leaks into the floor below to resealing every joint on a full block-long office building.
Core Waterproofing Services
The long facades of D.C. buildings have many expansion and control joints, and humid summers and cold winters keep them moving. When a joint opens, storm water and meltwater run in. We remove failed material, repair the edges and install high-movement sealant or preformed joint systems.
Window and curtain wall perimeters on older stone buildings and newer glass offices alike are frequent leak points. We replace perimeter sealant, reseal mullions and repair gaskets, and grime-dulled glass can be cleaned and protected with Glass Defender.
Parapets, penthouse walls and the edges of rooftop terraces and green roofs are where D.C. roofs most often leak. We seal the transitions where roof meets wall and coat parapets and copings with high-solids silicone.
Many D.C. office buildings from the 1970s and 1980s still rely on dry glazing gaskets that have shrunk and hardened. Wet glazing adds a continuous silicone seal between glass and frame and stops leaks without new windows.
Concrete and stucco crack through freeze-thaw cycles and summer heat. Elastomeric coatings bridge those cracks and stay flexible across the seasons, applied at full thickness after larger cracks are repaired.
Limestone, marble and old brick soak up rain and meltwater that can later freeze. Breathable penetrating repellents cut that absorption while letting moisture already inside escape.
Specialized Restoration-Waterproofing
Waterproofing is one part of a bigger job. Presto also restores the stone, brick, metal and glass under the seal using products we make ourselves, so one crew handles all of it.
Precast panels can leach salts that leave white streaks as water dries, and winter road salt adds to it near the street. Leach Stop is our treatment designed to reduce it. We clean the deposits, treat the panels and reseal their joints.
Metal copings, penthouse cladding and window frames move with the seasons, and every seam relies on sealant. We replace failed joints with sealants made for metal and reseal laps and fasteners.
Our Commercial Waterproofing Process in Washington, D.C.
Every D.C. waterproofing project follows five steps, and you see our findings and pricing before work begins.
Building Envelope Inspection
We inspect panel joints, glazing, parapets, terraces and penthouse transitions on every elevation and the roof.
Diagnostic Testing
Water tests show exactly where storm water or meltwater gets in.
Scope & Specification
Systems are chosen for humid summers, winter freezes and the materials on your building, then written into a clear scope.
Waterproofing Installation
Crews install each system within the temperature range the manufacturer requires.
Project Closeout & Warranty
You receive photos, product data and warranty records.
Talk to Presto About Waterproofing Your Washington, D.C. Building
Leaks below a rooftop terrace, stains after summer storms or caulking pulling away from stone? Call us or request a quote, and our team will respond to discuss your D.C. building.
Why Washington, D.C. Property Managers Choose Presto for Commercial Waterproofing
Our crews have waterproofed buildings across the country for more than 25 years. In D.C. we work carefully around stone, terraces and green roofs and plan around tenants, guests and busy downtown streets.
Our Local Washington, D.C. Support Network
A sealed building stays dry longest when someone checks terraces, drains and joints each spring. Presto connects D.C. owners with a local support network for that care.
For routine upkeep and everyday facility support, owners can also contact our sister companies:
Building Restoration Washington, D.C.: Hands-on exterior repairs for D.C. buildings.
Building Maintenance Washington, D.C.: Routine maintenance that catches failing joints and roof details early.
Building Services Washington, D.C.: General commercial building support across the city.
Recent Restoration Projects in Washington, D.C.
WASHINGTON, D.C. PORTFOLIO HIGHLIGHTS
Browse Presto’s restoration work in Washington, D.C.
Washington, D.C. Commercial Waterproofing FAQs
How often should sealants be replaced on a D.C. building?
Most joints last 10 to 15 years here, and sooner on walls that take the most sun and storm exposure.
What is the difference between waterproofing and water damage repair?
Waterproofing keeps water out at the exterior. Water damage repair fixes interior finishes after water gets in. We stop the source first so the inside only needs repair once.
Can waterproofing be done while the building is occupied?
Yes. Nearly all the work happens from outside or on the roof, scheduled around tenants, guests and students.
Why does the floor below a rooftop terrace leak?
Water usually gets in where the terrace membrane meets a parapet, penthouse wall or drain. Testing those transitions usually finds the opening.
How do I know if waterproofing can wait another year?
Leaks after storms, stains below terraces or split caulking mean it should not wait. If sealants are still flexible and nothing leaks, planned replacement over a few years is usually fine.
When is the best time for waterproofing work in D.C.?
Spring and fall are best, since sealants and coatings need the right temperatures to cure.
Other Washington, D.C. Building Restoration Services
Keep Water Out of Your Washington, D.C. Building
One open joint at a terrace or parapet can send storm water into the floors below. 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.