Home Depot, Lowe’s and Costco all sell impact windows, and the search results are full of their prices. For a single window on a budget they can work. For a whole house in South Florida, the differences in approval paperwork, installation, permitting and service usually matter more than the sticker price. Here is an honest comparison.
Side by side
| Big-box store | Licensed impact window installer | |
|---|---|---|
| Products | Stock sizes and a few brands; special orders for custom sizes | Measured and built to each opening; PGT, ES Windows, Mr. Glass, ECO, EMC, GIG |
| NOA and approvals | You confirm the product approval matches your wind zone | Installer selects an NOA-rated product for each opening and files the approvals |
| Permit | Often your responsibility, or an owner-builder permit | Pulled under the contractor’s license, inspection scheduled and attended |
| Installation | Subcontracted installers vary by job | Factory-trained crews that install to the approved drawings |
| Anchoring and sealing | Depends on the subcontractor | Done to the NOA details for your wall type, flashed and sealed |
| Who you call later | The store’s customer service line | The company that installed it, under its workmanship warranty |
| Insurance credit | Only if every opening is protected and documented | Documents provided for the wind mitigation inspection |
| Price | Lower per unit on stock sizes | Quoted per opening; current offers take 20% off the entire order |
Where big-box makes sense
- A single stock-size window or a shed, garage or utility opening
- You are a licensed contractor doing your own work
- You have confirmed the product carries a current Miami-Dade NOA or Florida Product Approval for your zone
Where it goes wrong
- Wrong approval. A window with a Florida Product Approval but no HVHZ rating cannot be permitted in Miami-Dade or Broward.
- Owner-builder permits. Pulling the permit yourself makes you responsible for the inspection and the work, and it is a red flag to insurers and buyers.
- Installation details. Anchoring, flashing and sealing are what make an impact window perform in a storm. A product installed with the wrong anchors fails inspection and leaks.
- Mixed documentation. Insurance credits require product approvals and a closed permit for every opening. Gaps cost you the credit.
- Service. When a roller or seal fails in year three, a store does not send a crew.
What to ask any seller
- What is the NOA or FL number for this exact window, and is it rated for my address?
- Who pulls the permit, and under whose license?
- Who installs it, and are they factory-trained on this product?
- Who do I call for warranty service?
- Will you provide the closed permit and approvals for my wind mitigation inspection?
Elevate Impact Windows answers all five on every quote. What impact windows cost and how the permit works.
Frequently asked questions
Are Home Depot impact windows good?
The products can be fine when they carry the right approval for your zone. The risk is in the permitting, installation and service, which is where most problems with storm windows show up.
Can I buy impact windows and install them myself in Florida?
Window replacement requires a permit and inspection. Homeowners can pull an owner-builder permit for their own primary residence, but they take on the liability, and non-permitted or failed work affects insurance and resale.
Why are installer quotes higher than store prices?
The quote includes measuring, custom sizing, product approvals, the permit, factory-trained installation, final inspection, haul-away and warranty service. Store prices usually cover the unit only.
Do big-box windows have a Miami-Dade NOA?
Some do and some do not. Check the label and the approval number for the exact product before buying anything for Miami-Dade or Broward.
Does the insurance credit apply to store-bought windows?
Yes, if every opening is impact-rated with documented approvals and a closed permit. The documentation is usually the hard part.