The Siding Installation Process: What to Expect
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Get free quotesThe steps, in order
- Tear-off and disposal. The old siding comes off completely (a proper job doesn't install over failing existing siding) and is hauled away.
- Sheathing inspection and repair. With the wall exposed, the crew checks for rot, water damage, or insect damage in the structural sheathing underneath — this is the point where hidden problems get caught, similar to decking damage on a roof tear-off.
- House wrap (weather-resistive barrier). A water- and air-resistant membrane goes over the sheathing before any siding, managing moisture that gets past the outer layer and improving energy efficiency. Skipping this is a serious corner-cut.
- Flashing installation. Metal or specialized flashing tape goes around every window, door, and penetration to direct water outward, similar in principle to roof flashing.
- Siding installation. Panels, boards, or shingles go up per the manufacturer's specifications, typically starting at the bottom (a starter strip) and working up.
- Trim and finish work. Corner posts, window and door trim, and any decorative elements are installed last, along with caulking at appropriate joints.
- Final cleanup and walkthrough. Debris removal and a walkthrough where you should confirm everything from the original estimate was actually done.
Pro tip from our network contractors
Ask specifically whether house wrap is included in your quote — some lower-bid contractors skip it or use an inferior product to cut costs, and it's the kind of thing that's invisible once the siding goes up but causes moisture problems for years afterward.
How long it takes, and what can extend it
A typical single-family home's siding replacement takes about 1–2 weeks from tear-off to finish, weather permitting. Larger homes, more complex architectural details (multiple gables, dormers, extensive trim), or unexpected sheathing repairs found during tear-off can extend the timeline. Weather is the biggest wildcard — most siding materials need dry conditions to install correctly, so a rainy stretch can pause work mid-project.
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Get free quotesFrequently asked questions
How long does it take to install new siding?
Typically 1-2 weeks for an average single-family home, though larger homes, complex architectural details, or unexpected sheathing repairs can extend the timeline.
Do you have to remove old siding before installing new siding?
For a proper installation, yes — reputable contractors remove old siding down to the sheathing rather than installing over it, which allows inspection and repair of any hidden water or pest damage.
What is house wrap and why does it matter?
House wrap is a weather-resistive barrier installed over the sheathing before siding goes on. It manages moisture that gets past the siding and improves energy efficiency — skipping it is a common corner-cut that causes problems years later.
What should I check during the final walkthrough?
Confirm every item from your original estimate was completed — house wrap, flashing at all penetrations, proper trim work — and check for any visible gaps, misaligned panels, or missed caulking before final payment.
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