One of the most common reasons homeowners put off a siding project isn't the cost — it's uncertainty. They know they need new siding, they may have even gotten a quote, but when it comes time to pull the trigger, the questions pile up. What actually happens? How long will it take? Will the crew show up and start tearing things apart without any warning?
That hesitation is completely understandable. A full siding replacement is one of the bigger exterior projects you can do on a house, and if you've never been through it, the process can feel like a black box. This article is meant to open it up. Here's exactly what to expect from a James Hardie siding installation — from the first conversation to the final walkthrough.
Step 1: The Consultation and Quote
The process starts with a conversation, not a sales pitch. A good siding contractor will come out to look at your home, understand what you're trying to accomplish, and give you a realistic picture of what the job involves.
At Vanguard Building Services, we provide free same-day quotes. During that visit, we'll look at your existing siding, evaluate the overall exterior condition, and ask about your style preferences, timeline, and budget. We'll walk you through the James Hardie product options — HardiePlank lap siding, HardieShingle, HardiePanel vertical siding — along with the color choices available through ColorPlus Technology.
This is also a good time to ask questions. How much experience does the crew have with Hardie specifically? Do they handle permits? Are they familiar with local building code requirements? These are fair questions and a reputable contractor should answer them directly.
Step 2: Material Selection
James Hardie makes several distinct siding styles, and choosing the right one involves both the look you want and the architecture of your home. HardiePlank lap siding is the most popular — it mimics traditional horizontal wood siding and works well on virtually any home style. HardieShingle creates a more textured, Cape Cod look. HardiePanel is vertical and works well for modern or board-and-batten aesthetics.
On color, you're choosing between primed siding that gets painted on-site after installation, or ColorPlus pre-finished siding where the color is factory-baked on before the boards leave the plant. For most homeowners, ColorPlus is the better choice — the color is more consistent, the finish is more durable, and you don't need to coordinate painters after the job is done. It comes with a 15-year warranty against peeling, cracking, and chipping.
Materials are ordered after measurements are confirmed. Popular colors and styles are usually stocked locally; some specialty options may take a few days from a distribution center. Your contractor coordinates delivery so everything is on-site before the crew starts.
Step 3: Permits and HOA Considerations
In the City of Chicago, in-kind siding replacement on a residential building of four stories or less generally doesn't require a building permit. But requirements vary significantly across the suburbs. Some municipalities require permits for siding work; others don't. Some require inspections of the house wrap before new siding goes on.
If your home is in an HOA, you'll likely need exterior change approval before work begins — especially for color changes. Historic districts may have additional requirements around material choices.
An experienced local contractor knows the requirements for your specific municipality and handles this for you. Vanguard serves communities throughout Chicagoland including Arlington Heights, Palatine, Highland Park, Schaumburg, and the north and northwest suburbs. We know the local codes and make sure any required approvals are in place before the crew starts.
Step 4: Removing the Old Siding
On the first day of installation, the crew removes your existing siding — vinyl, wood, aluminum, or whatever is there. Debris goes directly into a dumpster, so your yard stays clear throughout the project.
Once the old siding comes off, the crew inspects the wall sheathing for any signs of rot, water damage, or structural issues. In most cases everything looks fine. Occasionally there's localized rot — typically around windows, doors, or at the base of a wall where water has been getting in for years. Any damage found at this stage needs to be fixed before new siding goes on. Your contractor should walk you through what they find and what it takes to address it. Don't work with a contractor who glosses over this step.
Step 5: Weather Barrier Installation
Once the wall surface is clean and any damage repaired, a weather-resistant barrier — house wrap — goes on. This is a critical step. It protects your home from moisture that gets behind the siding, and some moisture always does, even with a perfect installation.
James Hardie recommends a vapor-permeable house wrap that allows moisture vapor to escape while blocking liquid water from penetrating. The crew also installs flashing around windows, doors, and any penetrations like electrical outlets or hose bibs. Flashing is where a lot of less experienced installers cut corners, and it's also where most long-term moisture problems originate. Pay attention to whether your contractor takes this step seriously.
Step 6: Installing the Siding
This is the main event. The crew starts at the bottom and works up, installing a starter strip along the base and then laying each course with the correct overlap. Hardie boards are heavy — the fiber cement requires two people to carry and position — so you'll typically see a larger crew than you might expect.
The crew pays attention to maintaining proper ground clearance (Hardie should never be in contact with soil or standing water), leaving appropriate expansion gaps, using corrosion-resistant fasteners, and nailing into studs rather than just the sheathing. HardieTrim boards around windows, doors, and corners go in as the job progresses, giving the finished exterior its clean look while adding moisture protection at the most vulnerable edges.
Step 7: Caulking and Finishing
Once siding and trim are in place, the crew caulks all vertical joints, edges, and gaps around penetrations. This step is essential for moisture control and for the clean appearance of the finished installation.
If you chose ColorPlus pre-finished siding, no painting is needed after this point. Touch-up kits are available from James Hardie for any small repairs down the road. If the siding was primed but not pre-finished, painting happens after caulking is dry.
Step 8: Cleanup and Final Walkthrough
A professional crew cleans up thoroughly when they're done — debris removed, dumpster taken away, and typically a magnetic roller run over the lawn and driveway to pick up stray nails. At Vanguard, we do a final walkthrough with you to review the completed work, go over warranty documentation, and make sure you're satisfied before we close out the project.
How Long Does It Take?
For a typical single-family home, a professional crew will complete a James Hardie installation in roughly one to two weeks, depending on the size of the house, the complexity of the design, and weather. Summer is the busiest season for exterior work, so scheduling a few weeks out is smart.
What Does the Warranty Cover?
James Hardie backs their siding with a 30-year non-prorated limited warranty on the fiber cement substrate, and a 15-year limited warranty on ColorPlus finish against peeling, cracking, and chipping. Both warranties are transferable to future owners, which is a genuine selling point if you put your home on the market.
Important: the product warranty requires the siding to be installed following James Hardie's installation guidelines. Significant installation errors can void coverage, which is a core reason that contractor selection matters as much as product selection with Hardie.
Ready to Get Started?
If you've been putting off a siding project because you weren't sure what to expect, hopefully this gives you a clear picture. It's a manageable project when done right, and the results last for decades.
Call Vanguard Building Services at (847) 334-0790 or request a free same-day quote at vanguardbuildingservices.com. We serve Arlington Heights, Schaumburg, Highland Park, Lake Forest, Palatine, and communities throughout the greater Chicagoland area.