GAF Bathroom Remodeling Nationwide | Barrett & Sons Construction

GAF Bathroom Remodeling: The Los Angeles Owner’s Guide

GAF bathroom remodeling in Los Angeles typically runs $10,620 to $33,040 installed, and we keep the GAF-compatible materials on hand to start most jobs within a week of your signed scope. Homeowners usually call us after a shower pan cracks, a membrane lets water behind the tile, or the grout lines keep darkening no matter how many times they scrub. The symptom that finally gets the phone picked up is usually water on the bathroom floor that has no business being there.

Call (877) 610-1318

We’re an independent Los Angeles contractor, not affiliated with GAF, but we’ve been installing and repairing their bathroom waterproofing lines for the better part of twenty years. Tom Barrett learned early that a bathroom is only as good as what’s under the tile. GAF makes that layer, and we know exactly how it should be installed in the San Fernando Valley’s hard water conditions and old slab foundations.

If you’re seeing tile movement, persistent musty smell, or baseboards that keep peeling, call us at (877) 610-1318. Estimates are free, and we’ll tell you honestly whether you need a repair or a full remodel.

Which GAF Bathroom Products This Applies To

GAF’s presence in bathrooms comes mainly through their waterproofing and roofing lines that intersect with wet-area construction. The two we work with most in Los Angeles are the GAF StormGuard® underlayment, used as a secondary waterproofing barrier under shower pans and tub surrounds, and GAF’s decking materials specified on second-story bathroom floors over living space. In older Los Angeles homes, we see a lot of failed pan liners that were never properly sealed at the drain collar, which is the same failure point GAF’s materials are engineered to prevent.

The compatibility question matters. GAF StormGuard is a self-adhering membrane rated for specific temperature ranges, and in Los Angeles attics that hit 130°F in August, the cheap aftermarket equivalents can soften and slide. We stock OEM GAF membrane plus a quality aftermarket option for homeowners who want to stay in budget. Both work if installed correctly. The difference is in how they hold up over ten years in our climate.

If you’re not sure what was installed under your shower, the easiest way to check is to pull the escutcheon plate behind the shower handle and look at the membrane color and thickness with a flashlight. GAF StormGuard has a distinct blue-gray release film. If you see raw drywall or black paper, that bathroom was never waterproofed to a standard we’d put our name on.

Signs Your GAF Bathroom Waterproofing Is Failing

• Grout stays dark at the shower floor corners. Water is wicking behind the tile and not draining forward. That’s a slope or membrane problem, not a cleaning problem.
• Baseboard on the other side of the shower wall is warping or peeling. Moisture has made it through the wall cavity. By the time you see this, the framing behind the tile is wet.
• Musty smell that never fully goes away. Mold is growing somewhere you can’t see. Los Angeles humidity near the coast makes this worse, and once the spores are in the wall cavity, only a proper tear-out fixes it.
• Tile feels spongy or gives slightly when you step on it. The subfloor is softening. In San Fernando Valley slab homes, this often means the pan liner failed at the drain and water’s been soaking the mud bed for years.
• Water stains on the ceiling below a second-floor bathroom. The leak has already traveled through the subfloor. This is the most expensive version of this problem, because you’re now repairing two rooms.

Any one of these is worth a call. All five at once means a full tear-out, and we’d rather catch it at one. Our number is (877) 610-1318, and a live person answers.

Replacement Cost & What’s Included

A full GAF-compatible bathroom remodel in Los Angeles lands between $10,620 and $33,040. The spread comes down to three things: the size of the bathroom, whether you’re doing a wet-area repair only or a complete gut, and your finish choices. A small bathroom remodel with a standard tub surround starts near the bottom of that range. A master bath with a walk-in shower, custom tile, and a new vanity runs toward the top.

Every scope we write includes the demo, the waterproofing work (GAF membrane or quality equivalent, specified in writing), the tile and setting materials, the fixtures you’ve approved, and cleanup. What you’ll never see is a change order that wasn’t handed to you on paper before we touched it. Tom Barrett’s rule is simple: an allowance that isn’t on paper is a surprise waiting for a date. We don’t do surprises.

All our work carries the 90-Day Done Right Promise. If it’s not right, Tom comes back and makes it right, one call.

DIY or Call Us?

Replacing a shower cartridge or a faucet washer is something a handy homeowner can do on a Saturday. Rebuilding a shower pan and waterproofing a bathroom is not. The membrane has to be lapped correctly at the corners, sealed at the drain collar, and tied into the wall waterproofing so water has nowhere to go but the drain. Get any of that wrong and you’ve built a mold factory that looks beautiful for about eighteen months.

There’s no dangerous tension or electrical work in a typical bathroom remodel, but the failure cost of a bad waterproofing job is measured in wet framing and rotted subfloors. That’s the part we’d rather see you call us on. If you’re anywhere in the San Fernando Valley, from Van Nuys to Encino to Studio City, call (877) 610-1318 and we’ll come take a look before you open a single wall.

How Long Does the Job Take?

A standard small bathroom remodel with us runs two to three weeks from demo to final inspection in Los Angeles. A full master bath runs four to six weeks. Here’s the honest breakdown:

• Days 1-2: Demo and inspection of what we find under the old tile. No surprises after this point; anything we find, we show you and price before moving on.
• Days 3-7: Rough-in work, subfloor repair if needed, and the GAF waterproofing installation with a 24-48 hour flood test (water sits in the pan, we watch the ceiling below).
• Days 8-14: Tile work, grout, and fixture installation. This is where the job either looks right or it doesn’t, and Tom’s sons are on-site making sure it does.
• Final days: Punch list, city inspection if your job had a permit, and walkthrough with you. We don’t call it done until you’ve walked it with us.

Timing in Los Angeles also depends on materials. Custom tile orders can add two to three weeks before demo even starts. We’ll lay that out in your initial scope so you’re never wondering where we are.

Do You Pull Permits on Bathroom Remodels?

Yes, on every job where the city of Los Angeles requires one. A waterproofing repair without moving walls or plumbing sometimes falls outside the permit requirement. A full bathroom gut with any plumbing movement does not. We pull the permit, we schedule the inspection, and we stand with you when the inspector walks through. Tom puts it this way: the permit inspector works for you, not for me, and that’s why I like him.

If another contractor tells you permits are optional, walk away. In Los Angeles, the Department of Building and Safety keeps records, and an unpermitted bathroom remodel becomes a liability when you sell. We’ll handle it so it’s never your problem.

Will the Price Change Once Work Starts?

Only if the scope changes, and only with a written change order you’ve signed first. When we open a wall and find rotted framing from a failed pan, we can’t eat that cost. What we can do is show you the damage, explain what needs to happen, and put the new number on paper before a single nail moves. You approve it or you don’t; we don’t start until you do.

The only time we find something unexpected is when water has been leaking longer than the visible symptoms suggested. That’s not common. What is common is a straight-forward tear-out and rebuild at the price we quoted. We’ve been doing this in Los Angeles since 1998, and there’s a reason neighbors still refer us to neighbors.

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