The most important questions to ask a licensed window contractor are simple: are you registered and insured, how much work have you done on older Pittsburgh homes, who pulls the permit, what does the quote include, and what warranty covers the labor. How comfortably a contractor answers tells you almost everything about how the job will go.
Most homeowners we meet have already talked to someone who could not answer those questions straight. This guide walks through each one, what a good answer sounds like, and the red flags worth walking away from before anyone touches your house. If you are early in the process, our page on window replacement in Pittsburgh explains how we handle estimates and installs.
Short answer: ask for the contractor’s Pennsylvania HIC registration number and proof of insurance first, then ask about older homes, permits, disposal, lead time and the workmanship warranty, and get every answer in writing.
Start With License, Insurance and Local Experience
The biggest mistake we see is treating window replacement like a price only decision. A low number on paper means very little if the crew rushes the install or skips the prep that actually makes a window last.
When you sit down with a window contractor, start with the basics. In Pennsylvania, contractors who do home improvement work must register with the Attorney General and carry a Home Improvement Contractor number. You can check a number on the Attorney General’s HIC registration page, and our guide to what a Pennsylvania HIC number means for homeowners explains what that registration does and does not cover. Ours is PA#126638, and we carry insurance on every job.
Next, ask how long they have worked in this region specifically. Pittsburgh weather is hard on seals, sashes and frames, freezing and thawing over and over through the winter. A crew that learned the trade in a mild climate tends to figure that out on your house.
Ask for references from jobs that are at least a few years old, because a good install proves itself over time, not on day one. Alan Construction has served Pittsburgh since 2003, and we are happy to point you to our reviews.
A new double hung window lit from inside at dusk, set in a light brick wall. Alan Construction job, Pittsburgh.
Questions to Ask About Older Pittsburgh Homes
So many of our homes were built before 1940, with hand laid brick, lath and plaster walls, and openings that are almost never perfectly square. That history is part of the charm, and it also makes window replacement trickier than the brochures admit.
Ask any candidate what real experience they have with houses from your era. If they cannot tell you how they deal with crumbling plaster, settled framing or old weight pocket sash windows, that hesitation tells you plenty. The right answer is calm and specific, not a shrug. Ask, too, whether they plan an insert or a full frame install, and why. Our post on full frame vs insert window replacement covers how that choice gets made.
Historic Districts and Matching the Original Look
Some city neighborhoods, including the Mexican War Streets, are local historic districts with rules about what you can change on the front of a house. A contractor worth hiring will already know this and bring it up before you do. Ask whether your block carries any design rules, and whether they will help you stay compliant instead of leaving you to sort it out alone.
Permits, Disposal and the Details People Forget
Here is something that surprises almost everyone. Swapping a window in the same opening, at the same size, often does not need a building permit. Enlarging an opening or changing the framing usually does, and historic districts add their own review.
So ask your contractor plainly whether your project needs a permit, and whether they pull the paperwork or quietly leave it on your plate.
While you are at it, confirm that haul away and disposal of the old units are written into the quote. Surprise debris fees are a classic way for a cheap estimate to grow after the work is done.
New dark gray vinyl siding with white trim around the windows, above a brick base. Alan Construction job, Pittsburgh.
How Long Does It Take to Remove an Old Window and Install a New One?
This question comes up in nearly every consultation, and the honest answer is faster than most people expect. For a standard window in a sound opening, the swap itself is measured in hours, not days. Larger bay or picture windows take longer, because they are heavy and the fit has to be precise.
The real variable is what sits behind the old frame. If a crew opens things up and finds rot or water damage, it should stop and repair it first. That adds time, and it spares you a far bigger problem down the road. Ask every contractor what they do when they find damage, and how they will tell you about it. We go deeper on this in how long it takes to replace a window.
Can New Windows Be Installed in a Day?
Often, yes, once the windows are on site. The part that really stretches the timeline is manufacturing. Replacement windows are usually built to order for your exact openings, and the factory sets the pace, not the install. Ask for a realistic lead time at the start, and be wary of anyone promising the whole job overnight.
Warranty Questions to Ask a Window Contractor
A manufacturer warranty covers the glass and the frame, but it does nothing for you if the labor was sloppy. So always ask about the workmanship warranty, meaning the coverage on the actual installation, and get its length in writing.
Ask what the warranty requires from you, whether it transfers if you sell the house, and who you call if a window starts to leak in year three. A solid window job should arrive with both protections in place, not just the one printed on the manufacturer’s box. Coverage that lives only in a salesperson’s promise is worth nothing.
A new white sliding door set in a brick wall on an upper porch, with job debris still on the floor. Alan Construction job, Pittsburgh.
Who Actually Shows Up on Install Day
You would be amazed how often the friendly person who sells the job is not the person who installs it. Some outfits sell the work, then hand it off to whichever subcontractor happens to be free that week.
Ask your window contractor directly who will be on your property, whether they are employees or subcontractors, and who is in charge of the job day to day. Then ask who your point of contact is if something comes up. A contractor who answers that clearly is usually one who runs an organized job.
A Simple Checklist Before You Sign Anything
Bring this short list to any consultation. The answers, and how comfortably they come, will tell you almost everything about who you are dealing with.
| Question to ask | What a good answer sounds like |
|---|---|
| Are you registered and insured? | A PA HIC number and proof of insurance, shown before any work begins |
| How long have you worked in this area? | Specific local experience, not vague claims |
| Do I need a permit, and will you handle it? | A clear yes or no, with the paperwork managed for you |
| Is disposal included in the quote? | Haul away of the old windows written right in |
| What is your workmanship warranty? | A defined length, in writing, on the labor |
| Who installs, and who do I call? | A named point of contact and a clear answer about the crew |
One last piece of advice before you choose. Take ten minutes to understand how energy ratings work, because the right glass for our climate makes a real difference on January heating bills.
The government’s ENERGY STAR windows guide is a plain place to start. Ask good questions, trust the contractor who answers them without dodging or rushing you, and your new windows should serve you well for decades.
New windows with grids lit from inside a brick facade at night. Alan Construction job, Pittsburgh.
Frequently Asked Questions
Pennsylvania registers home improvement contractors through the Attorney General rather than issuing a state license. Ask for the contractor's HIC number, then look it up on the Attorney General's registration site. A registered contractor should also show proof of insurance before work starts. Alan Construction's registration is PA#126638.
A same size swap in the existing opening often does not need a building permit, but enlarging an opening or changing the framing usually does, and local historic districts add their own review. Ask your contractor to confirm for your address and to say in writing who pulls any permit.
You want two warranties: the manufacturer's coverage on the window itself and the contractor's workmanship warranty on the installation. Get the length and terms of the workmanship warranty in writing, ask whether it transfers to a new owner, and ask who handles a claim if a window leaks later.
Often, yes, once the windows arrive. Replacement windows are usually built to order, so the wait for manufacturing is the longest part of the project. Hidden rot or water damage behind an old frame can add repair time on install day, which is why a good contractor checks each opening first.
Want straight answers about your own windows? Request a free, no obligation estimate and we will walk through every question on this list with you.
