GAF Master Elite Roofing Contractor

Waterproofing Service In San Antonio For Roofs And Decks

Water doesn’t need much of an opening. A cracked pipe boot, a tired seam, a deck that never drained right. We find where it’s getting in, then seal it with a system rated for what that surface actually takes.

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Quick Answer

What Is A Waterproofing Service?

A waterproofing service is the work that keeps water out of a building at the places most likely to let it in. On a roof that means low slope membranes, the flashing where the roof meets a wall, and every pipe, vent and drain that punches through it. Different surfaces need different systems. We match the system to the exposure and to what the manufacturer will actually warranty.

Where Water Actually Gets In

Almost nobody calls about a roof. They call about a stain on the ceiling. By then the water has been travelling for a while, and the spot it landed is rarely the spot it entered.

Low Slope And Flat Roof Areas

A low slope roof doesn’t shed water, it holds it and waits. Seams, laps and edge metal do the work instead of gravity. When one of those lets go you don’t get a drip, you get a soaked insulation board that stays wet. We re-membrane the area with TPO, PVC or modified bitumen depending on the exposure.

  • Seams and laps checked across the whole field
  • Wet insulation pulled, not covered over
  • System matched to the exposure and the warranty

Every Penetration Through The Roof

Each pipe, vent, drain and skylight is a hole somebody sealed once and hoped for. Pipe boots crack from UV. Sealant shrinks. That’s where most leaks start, and it’s the cheapest thing on this page to fix if you catch it early.

  • Every penetration inspected and photographed
  • Cracked boots and collars replaced
  • Flashing rebuilt rather than re-caulked

Where The Roof Meets A Wall

Wall tie-ins, parapets and chimney sides are the hardest detail on any building. Two materials, two rates of movement, one joint between them. Caulk alone won’t hold that for long. We rebuild the flashing so the joint sheds water instead of relying on a bead of sealant to do it.

  • Counter flashing set into the wall properly
  • Parapet and chimney details rebuilt
  • No sealant-only repairs

Standing Water That Won’t Drain

Water still sitting on a roof two days after rain is telling you something. Usually a drain that’s blocked, a slope that was never right, or insulation that’s compressed into a bowl. Ponding shortens the life of any membrane under it. We correct the drainage first, because a new membrane over a low spot just ponds again. Ongoing checks live in our maintenance program.

  • Drains and scuppers cleared and tested
  • Tapered insulation where the slope is wrong
  • Ponding corrected before new membrane goes down

How BH Roofing Handles Waterproofing

We don’t guess at where water came in. Finding the entry point is most of the job, and it’s the part plenty of companies skip in favour of sealing whatever looks worst.

1

The 27-point inspection, free

We walk the roof and everything attached to it. You get photos and a written scope before any money changes hands.

2

Find the entry point, not the stain

Water travels. We trace it back uphill to where it actually got in, which is often nowhere near the ceiling mark.

3

Match the system to the surface

Low slope, steep slope, a wall tie-in and a pipe boot all want different products. We pick what the manufacturer will stand behind.

4

Dry it in the same day we open it

Nothing sits open overnight. If weather turns before we’re done, it gets tarped before we leave.

5

Water test, then the 27 points again

We put water back on it and watch. Anything that doesn’t hold gets fixed before we invoice.

GAF Master Elite is the top 2% of roofing contractors in North America. We’re one of them, and that’s what lets us put a written workmanship guarantee behind residential and commercial work both. If you’ve got water coming in right now, don’t wait on a form. Call (210) 267-9029. Somebody picks up, 24 hours a day.

Waterproofing Questions, Answered

Is waterproofing the same thing as a new roof?
No, and it’s usually a lot cheaper. Waterproofing targets the places water gets in: seams, flashing, penetrations, drainage. A replacement means the whole system is past saving. The free 27-point inspection tells you which one you’re actually looking at, and we’ll say so plainly either way.
TPO, PVC or modified bitumen, which one do I need?
It depends on what the roof takes. TPO is the common choice for heat reflectivity on a commercial field. PVC handles grease and chemical exposure, so it suits restaurants. Modified bitumen holds up where there’s foot traffic. We’ll walk you through the trade-off for your building rather than defaulting to one.
Will my insurance pay for water damage?
That depends on your policy and your adjuster’s findings, and we can’t answer it for you. Texas policies commonly exclude damage from continuous or repeated seepage, which is what a slow leak becomes. What we do is put together the photos and documentation that support your claim. Filing it stays your call. Our insurance claim page walks through what to expect.
How do you find a leak you can’t see?
We start at the stain and work uphill, because water runs along framing and decking before it drops. Penetrations get checked first since that’s where most leaks begin. If it isn’t obvious we water test in sections until it shows. We don’t seal things at random and hope.
How long does a waterproofing job take?
A handful of penetrations and some flashing is usually a day. A low slope section with wet insulation runs two to four days depending on how much has to come out. Full membrane replacement on a commercial roof is longer and gets phased. You’ll get the real timeline in writing before we start.
Do you work on commercial buildings as well as homes?
Both. Most low slope waterproofing is commercial work, including apartments, warehouses, offices and restaurants. On homes it’s usually penetrations, flashing and flat porch or patio sections. Multi-building properties get phased so tenants keep access.
What does the 27-point inspection cover?
The roof surface, the flashing at every penetration, the decking condition, the ventilation, the drainage, and the places where the roof ties into the rest of the building. You get the photos and the findings in writing. It’s free, and there’s no obligation attached to it.

Find The Leak Before It Finds Your Insulation

Start with the free 27-point inspection. You’ll get photos, a written scope and a real timeline before you decide anything.

Book Your Free Inspection Call (210) 267-9029

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