Why We Had to Completely Tear Out a 'Brand New' Window Replacement in Round Rock Last Week

The Boomtown Trap: How Austin's Growth Opened the Door to Unqualified Contractors

Austin added more than 50,000 new residents in a single year. That kind of explosive growth is great for the local economy — and an absolute goldmine for every cut-rate contractor who loads up a truck, prints a flyer, and starts knocking on doors in Round Rock, Cedar Park, and Pflugerville. When demand for home exterior services skyrockets faster than the qualified workforce can keep up, homeowners start making decisions based on price alone. That's when the trouble starts.

We've seen this pattern play out dozens of times over the past few years. Fly-by-night crews — many with no Texas registration, no liability insurance, and no real training — are winning bids simply because they quote the lowest number. And for a project like window replacement, where the work hidden behind the frame matters far more than what you can see from the curb, that gamble can cost you dearly.

What happened in Round Rock last week is a perfect example.

The Incident: A "Great Deal" That Lasted Exactly One Rainstorm

The homeowner — let's call her Maria — had three windows on the south-facing wall of her 2004 brick-and-frame home that were foggy, drafty, and clearly past their prime. She got four quotes. Three came in between $4,200 and $5,800 for the job. The fourth came in at $2,100. Same window count. Same sales pitch. Half the price.

She went with the cheap crew. They showed up on a Tuesday, finished by Thursday afternoon, and were gone before she could even ask about a warranty document. The frames looked clean. The caulk lines were smooth enough. From the street, it looked like a perfectly executed window replacement.

Then, eleven days later, a classic Central Texas spring storm rolled through — the kind that drops two inches of rain in forty minutes with wind gusts pushing 45 mph out of the south. Maria called us the next morning. There was water running down her interior drywall, pooling on the windowsill, and seeping under the baseboard trim on two of the three new windows.

We were on-site within 24 hours.

The Investigation: What Was Actually Hiding Behind Those Frames

Our lead installer, who has been doing window and exterior work in the Austin area for over a decade, pulled the first window within twenty minutes of arriving. What he found was textbook negligence — the kind of installation that looks finished from ten feet away and fails catastrophically the first time it rains sideways.

Missing Flashing — The Single Most Common Mistake

Proper window installation requires a continuous flashing system — typically a combination of self-adhering waterproof membrane and metal or vinyl drip cap — that integrates with the weather-resistive barrier (WRB) behind the cladding. It's not optional. Building Science Corporation has documented extensively how the window-to-wall interface is the single most vulnerable point for water intrusion in residential construction. Maria's new windows had none of it. No sill pan flashing. No head flashing. Just a bead of exterior caulk around the perimeter — the contractor's version of crossing your fingers.

Wrong-Sized Units Shimmed Into Place

Here's something most homeowners don't realize: windows are manufactured to specific rough opening dimensions, and the fit needs to be precise. When we measured Maria's rough openings, two of the three windows were a full three-quarters of an inch narrower than the units the crew had installed. Instead of ordering correctly sized units or properly adjusting the rough opening, the crew shimmed the gaps with wood scraps and foam backer rod, then buried it all under caulk. Those shims were already showing early signs of water absorption when we pulled the frame — less than two weeks after installation.

Early-Stage Wood Rot Was Already Present

The most alarming discovery was in the lower corner of the largest window's rough opening. The OSB sheathing behind the frame was soft — not just damp, but actively beginning to degrade. This wasn't damage from Maria's storm. This was pre-existing moisture that the original windows had been containing, and that the new installation — without any proper drainage plane or flashing — immediately made worse. Left unaddressed, that rot would have spread into the wall cavity within one or two more rain seasons. We're talking mold remediation, structural repair, and new siding — a four- to five-figure problem on top of everything else.

If you're curious how quickly a poorly protected wall assembly can deteriorate in the Austin climate, our breakdown of what heat and moisture do to builder-grade exterior materials gives you a clear picture of how fast things can go wrong when the system behind the cladding isn't protected.

The True Cost of "Cheap": Paying for the Same Job Twice

Maria paid $2,100 for her original installation. By the time we finished the tear-out, proper waterproofing, and correct reinstallation — plus addressing the early rot in the sheathing — her total out-of-pocket cost was over $6,800. That's more than three times what she would have paid for the highest quote she received the first time around.

This is the pattern we see over and over again with rushed, corner-cutting home improvement work. The savings feel real at signing. They evaporate the first time it rains.

The math is brutal but simple: a cheap installation that fails doesn't just cost you the repair — it costs you the original job, the repair, and often the collateral damage to the surrounding materials. ENERGY STAR's guidance on windows and doors is clear that improper installation voids most manufacturer warranties and eliminates any energy performance claims — meaning Maria was also paying to heat and cool through two improperly seated frames all spring long.

It's the same dynamic we've written about with roofing: cheap labor after a storm is almost never cheap in the long run. Our post on why storm-chaser contractors are so dangerous for Austin homeowners walks through the exact same psychology — and the exact same financial aftermath.

The Local Vetting Guide: Three Non-Negotiable Questions for Window Companies

Before you let any crew touch your home's exterior — especially for a window or door project where the waterproofing is buried and invisible after the fact — ask these three questions. The answers will tell you everything you need to know.

1. "Can You Walk Me Through Your Flashing and Waterproofing Process?"

A qualified installer should be able to describe, without hesitation, how they integrate the window unit with your existing weather-resistive barrier. They should mention sill pan flashing, head flashing, and how they handle the drainage plane. If the answer is "we caulk it real good," walk away immediately. Caulk is a secondary line of defense — never the primary one.

2. "Are You Licensed and Insured in the State of Texas?"

Texas requires contractors to carry general liability insurance and, depending on the scope of work, specific trade licensing. Ask for the certificate of insurance directly — not a verbal confirmation. Call the insurance provider to verify it's active. This one step alone eliminates a huge percentage of fly-by-night operators, because legitimate insurance costs real money and requires a real business history to obtain.

3. "What's Your Warranty, and Who Backs It?"

Manufacturer warranties on quality window units from brands like Andersen or Pella are substantial — but they are almost universally voided by improper installation. A reputable local contractor offers their own labor warranty on top of the product warranty, typically one to three years minimum, and they have an actual business address and phone number you can call if something goes wrong six months from now. If the company you're considering can't produce a written labor warranty, that's your answer.

Our full window replacement service page outlines the process and materials we use on every project — it's a useful benchmark for evaluating what "done right" actually looks like.

Before You Sign Anything, Do This

Austin's exterior contractor market isn't going to slow down. The city keeps growing, the storms keep coming, and the opportunity for under-qualified crews to make a quick buck at a homeowner's expense isn't going away. The only protection you have is asking the right questions before the work starts — because once those frames are in and the caulk is dry, you won't know what's hiding behind them until the next heavy rain.

If you have windows that are drafty, fogged, or simply aging out, a quick conversation with a qualified local contractor — before you accept the lowest bid — could save you thousands. You can schedule a no-pressure assessment with Austin Pro Siding here, and we'll tell you honestly what your home needs and what it doesn't.

Maria's windows are properly installed now. Her walls are dry. She told us she wished she'd asked one more question before she signed that first contract. You don't have to learn that lesson the hard way.