Siding Replacement Guide: What to Expect & Why It Matters
A siding replacement is rarely just about the siding. Once the old siding comes off, what is underneath determines the scope of the project. On older homes and homes that have been sitting vacant, the scope often includes wood rot repair, new moisture barriers, and sometimes structural repairs to the wall sheathing before the new siding ever goes up. Brennan Enterprises shows a project where the house had been vacant for five or six years with wood rot everywhere. The exterior remodel involved a new roof, all new replacement windows, and a complete siding replacement with new moisture barriers and trim. The transformation from a deteriorating exterior to a finished weathertight home is what a full siding replacement actually looks like when done correctly.
Brennan Enterprises walks through a complete exterior home transformation, showing how siding replacement, new windows, a new roof, and wood rot repair work together to completely change the appearance and protection of a house that had been sitting vacant.
The project order matters. On this house, the roof was replaced first because a leaking roof damages everything below it. The windows were replaced second because the window openings needed to be prepped and flashed before the new siding went on. The wood rot was cut out and replaced with new lumber throughout the exterior before any new materials were installed. Only after the roof, windows, and structural repairs were complete did the siding installation begin. The correct sequence prevents new materials from being installed over damaged framing that will continue to deteriorate behind the new siding. The siding pillar page covers the full range of siding material options and what drives siding replacement costs.
Moisture Barriers and Why They Go On First
Before the siding goes on, a moisture barrier is applied over the wall sheathing. On this project, the crew used a high-performance house wrap that serves two purposes. It prevents water that gets behind the siding from reaching the wood sheathing, and it allows water vapor from inside the wall cavity to escape so moisture does not become trapped in the framing. The moisture barrier is the last line of defense between the exterior and the wood structure of the house. If the barrier is missing, torn, or improperly installed, water that gets behind the siding, which it will eventually in a driving rain, soaks into the sheathing and begins the rot process that was just repaired.
The house wrap also adds a small amount of insulation value, but that is not its primary job. Its primary job is to keep the wood sheathing dry. The product used on this project is a high-performance wrap that is more durable and more vapor-permeable than basic house wrap. The cost difference between a basic wrap and a high-performance wrap is a few hundred dollars on a whole-house siding project. The cost of replacing rotted wall sheathing is measured in thousands. The guide to siding maintenance covers what to inspect to catch moisture problems before they require major repairs.
Siding Installation and Trim Details
The siding product used on this project is an interlocking shake-style vinyl siding with an uneven edge profile that mimics the look of hand-cut cedar shakes. Each panel interlocks with the panel below it and is fastened with screws through the top flange. The interlocking connection creates a stable attachment that resists being blown off in high winds. The product is also hail-resistant, which matters in Texas where hail storms are a regular occurrence.
The trim details finish the project. All of the corners, window surrounds, door trim, and soffit are wrapped in aluminum coil stock bent on site to match the exact dimensions of each opening. The aluminum trim covers the edges of the siding at every transition, creating clean lines and sealing the perimeter of each opening against water intrusion. The soffit under the roof eaves is a vinyl product that vents the attic while keeping insects and birds out. These trim details are the part of a siding job that separates a professional installation from one that looks unfinished. Homeowners in the Arlington, Texas area can reach Brennan Enterprises at brennancorp.com or 817-860-9767.
Frequently Asked Questions
What should be done before new siding is installed?
The roof should be repaired or replaced if it is leaking. Damaged wood sheathing and framing should be cut out and replaced with new lumber. Windows should be replaced or at minimum re-flashed before the new siding goes on. A moisture barrier should be applied over the entire wall sheathing before siding installation begins.
Why does wood rot need to be repaired before siding goes on?
Wood rot is caused by moisture and fungus. If rotted wood is covered with new siding without being removed, the rot continues to spread behind the new materials. The siding will be attached to framing that is losing structural integrity, and the problem will be discovered years later when the siding has to be removed again to fix what should have been fixed the first time.
What is the purpose of house wrap under siding?
House wrap prevents liquid water that gets behind the siding from reaching the wood sheathing. It also allows water vapor from inside the wall to escape, preventing moisture from being trapped in the framing. House wrap is the last line of defense between the exterior and the wood structure of the house.
How long does a full exterior siding replacement take?
A full exterior replacement including wood rot repair, new house wrap, siding, and trim on an average-size home typically takes one to two weeks. The timeline depends on how much wood rot is found once the old siding is removed and whether window or roof replacement is part of the same project.
Does new siding improve home value?
Yes. Siding replacement consistently ranks among the top exterior remodeling projects for return on investment. According to Remodeling Magazine's Cost vs Value report, vinyl siding replacement returns approximately 67 to 75 percent of its cost in increased home value. Fiber cement siding returns 76 to 85 percent. The curb appeal improvement alone can make the difference in a home selling quickly versus sitting on the market.
Coordinating Exterior Remodeling Tasks for Maximum ROI
A major exterior remodeling transformation yields the highest return on investment when all wall and roof penetrations are addressed systematically. Replacing worn siding while simultaneously installing new energy-efficient windows ensures that window capping and house wrap flashing overlap seamlessly. This prevents moisture from seeping behind wall cladding at critical window corner joints.
Upgrading soffit and fascia boards alongside new vinyl or fiber cement siding also establishes continuous roofline ventilation and prevents animal intrusion. Coordinating these exterior trades simultaneously saves thousands of dollars in scaffolding and staging labor compared to doing each project separately over multiple years.
Selecting Color Palettes and Trim Details for Siding
A complete siding transformation allows homeowners to reimagine their home exterior design. Combining deep neutral body siding colors — such as charcoal grey, navy blue, or sage green — with bright white window trim and dark accent shutters establishes modern architectural contrast. Choosing high-quality vinyl or fiber cement lap siding ensures color fastness and prevents UV fading over decades of sun exposure.
When you are ready to get estimates from licensed contractors in your area, contact Home Upgrade Pros or call: (725) 745-8553 to connect with professionals who offer free no-obligation assessments.
