James Hardie Siding Replacement and Window Replacement in Boulder, CO – Forever Home Full Upgrade

Project Summary

We completed a full siding and window replacement on this Boulder, CO home in July 2025. Our team installed James Hardie 8.25 inch HardiePlank Lap Siding in Evening Blue alongside Pella Encompass by Pella Windows with Low-E Argon Glass. The project included new Arctic White trim and a complete gutter system, taking three weeks to finish from start to completion.

The Problem

When Carly first reached out, she and her husband were looking to update their forever home in Boulder. They had owned the property for some time and wanted to invest in a major remodel that would refresh the exterior of their 1972-built house. The original siding was old and showing its age, prompting them to explore modern fiber cement options.

The existing exterior materials were worn beyond simple repair, making a full replacement necessary to achieve a cohesive look. Keeping the aging siding in place would have left the home with an inconsistent appearance as new windows were added. A complete overhaul allowed us to address every surface at once rather than patching individual areas over time.

Why It Needed Replacing

The siding was original to the home built in 1972, meaning fifty years of wear had reached its limit. Replacing the entire exterior with James Hardie siding provided a uniform look and updated materials that spot repairs could not achieve on such an aging surface.

What We Did

We began this project by addressing the siding substrate, replacing damaged areas with new OSB where the old sheathing was compromised. With a solid foundation in place, we turned our attention to the siding and window installation. We installed James Hardie 8.25-inch HardiePlank Lap Siding in Evening Blue along the main surfaces of the home. To complement the lap siding, we added James Hardie Panel Siding in both Arctic White and Evening Blue for specific architectural details.

We completed the exterior look with precise trim work using James Hardie HardieTrim in Arctic White, James Hardie HardieTrim Primed, James Hardie 2-1/2-inch Batten in Arctic White, and James Hardie 2.5-inch Batten in Evening Blue. We also installed Pella Encompass by Pella Windows with Low-E Argon Glass to upgrade the home's efficiency and style. To protect the new exterior, we added a 5-inch Seamless Aluminum Gutter System.

Project Details

This home in Boulder required a complete exterior transformation covering 1,779 square feet of siding and trim work. The scope included updating 20 window and door openings while navigating 13 inside corners and 7 outside corners on the structure. We also replaced windows throughout the residence to match the new siding profile.

The project involved significant coordination between multiple trades to ensure proper installation sequencing, particularly with the window nail fin application requiring substrate preparation beforehand. The entire scope was completed in July 2025 after a three-week installation period.

Materials Used

• 5" Seamless Aluminum Gutter System
• James Hardie 2-1/2" Batten in Arctic White
• James Hardie 2.5" Batten Eve Blue
• James Hardie 8.25" HardiePlank Lap Siding in Evening Blue
• James Hardie HardieTrim in Arctic White
• James Hardie HardieTrim Primed
• James Hardie Panel Siding in Arctic White and Evening Blue
• Pella Encompass by Pella® (W) Windows with Low-E Argon Glass

Price Context

This project was completed at approximately $38 per sq ft installed. This figure represents the complete installed scope for this home, including tear-off, trim, windows, and labor, rather than just the cost of siding material alone, which is why specific homes often run above general market ranges. Because no two homes are identical, costs vary significantly based on individual property needs.

The price covers a full tear-off and replacement, permit handling if required, window installation, trim work, and all labor. Homeowners considering a similar James Hardie 8.25 inch HardiePlank Lap Siding ColorPlus project in Colorado should generally expect pricing in the range of $20.00–$24.00/sq ft installed.

Homeowners considering similar upgraded window replacements in Colorado today should generally expect pricing in a comparable range per window, depending on window size and type (slider vs. picture window vs. others), the glass package selected, whether trim is being retained or replaced, HOA-driven style or color requirements, and the number of openings being replaced at once.

Pricing varies from home to home due to factors like siding profile, trim package complexity, wall conditions, and existing material removal requirements. Additional scope items such as sheathing repair or specialty flashing can also impact the final cost. Pricing reflects WestPro project data and current Colorado Front Range supplier costs. For an exact price on your home, the best next step is a free, no-obligation inspection.

The Result

Finished in July 2025, this home now features a refreshed exterior with durable fiber cement siding and updated windows that improve both style and energy efficiency. The Evening Blue lap siding paired with Arctic White trim and battens creates a crisp, modern look that honors the home's mid-century character while providing long-lasting protection.

Projects like this are common throughout Boulder and across the Colorado Front Range, where homeowners seek to replace aging original exteriors with low-maintenance materials designed for local weather conditions.

Thinking about a similar project for your home? Schedule a free inspection with WestPro to get started.