Why Your Mobile Home Needs Skirting and How to Get It Right
You’ve just settled into your mobile home, enjoying the affordable living and cozy space, when you notice the problem. Cold drafts whistle under the floor in winter, and in summer, you see critters eyeing the dark, open space beneath your home. Not only is this uncomfortable, but it’s also costing you money on utilities and potentially leading to frozen pipes or structural damage.
This is where mobile home skirting comes in. It’s not just about curb appeal, though a finished look is a nice bonus. Proper skirting acts as a critical barrier, insulating your home’s underbelly, protecting plumbing, deterring pests, and preventing moisture buildup that can lead to mold and rot. The good news? Installing it yourself is a very achievable weekend project that can save you thousands compared to professional installation.
This guide will walk you through the entire process, from choosing the right materials to the final trim piece. We’ll cover the tools you need, preparation steps, installation techniques for different skirting types, and crucial tips to avoid common mistakes that DIYers make.
Gathering Your Tools and Choosing the Right Skirting
Before you buy a single panel, you need a plan. The first decision is material. Your main options are vinyl, metal, and concrete board (like Hardie panel). Vinyl is the most popular for DIY because it’s lightweight, durable, and comes in interlocking panels that are relatively easy to cut and install. Metal skirting is strong and provides excellent security but can be louder in the wind and harder to cut without specialized tools. Concrete board is extremely durable and fire-resistant but is very heavy and requires more complex handling.
For this guide, we’ll focus on vinyl skirting, as it’s the most common choice for a homeowner-installed project. You’ll need to measure the perimeter of your mobile home to calculate how much material to buy. Don’t just guess. Grab a tape measure and walk the entire foundation.
Here is your essential toolkit for the job:
– A sturdy tape measure (at least 25 feet)
– A 4-foot level
– A chalk line
– A circular saw or tin snips (for cutting vinyl)
– A drill with screwdriver bits
– A shovel and a post-hole digger (if installing a gravel base)
– Safety glasses and work gloves
– Concrete screws or landscape spikes (depending on your base)
– The skirting panels, top channel (or rail), and bottom channel (or rail)
When purchasing, remember to account for doors, vents, and utility access points. You’ll need to cut panels to fit around these. It’s always better to buy 10% extra material to account for mistakes and odd cuts.
Preparing the Ground for a Solid Foundation
This is the most critical step that most people want to skip. Do not install skirting directly on dirt or grass. Over time, the ground will shift, settle, and erode, leaving your skirting sagging, warped, or full of gaps.
You have two main options for a base. The first and most recommended is a shallow concrete footing. This involves digging a narrow trench around the perimeter, about 4-6 inches deep and 8 inches wide, and pouring a simple concrete curb. This creates a permanent, level, and rodent-proof base to attach your bottom rail.
The second, more common DIY option is a compacted gravel base. Dig a trench about 6 inches deep and 12 inches wide around the home. Fill it with crushed gravel or road base, not round pea gravel. Use a hand tamper or rent a plate compactor to pack the gravel down firmly and create a level surface. This provides excellent drainage and a stable foundation.
Whichever method you choose, use your 4-foot level and a string line frequently to ensure the base is as level as possible all the way around. A level base makes installing the straight, panels infinitely easier.
Step-by-Step Installation of Vinyl Skirting
With your tools ready and your base prepared, you can begin the main installation. Always start on the least visible side of the home to get your technique down before moving to the front.
Installing the Top and Bottom Channels
The top channel, often called a “nailer” or “holder,” gets attached directly to the underside of your mobile home’s frame. Locate the steel I-beam that runs around the perimeter. This is your attachment point. Hold the top channel up so it is level and secure it to the beam using concrete screws or self-tapping metal screws every 12 to 16 inches.
Next, attach the bottom channel to your prepared foundation. If you have a concrete footing, use concrete screws or anchors. If you have a gravel base, you will use long landscape spikes. Drive the spikes through the bottom channel and deep into the compacted gravel. The goal is to have the top of the bottom channel sitting level and parallel with the top channel you just installed.
This step sets the stage for everything else. Take your time here. Use the chalk line to mark a straight reference line on the foundation before attaching the bottom channel to keep it perfectly aligned.
Cutting and Placing the Skirting Panels
Now for the panels. Measure the height between the top of the bottom channel and the bottom of the top channel. Subtract about 1/4 inch to allow for expansion and contraction. This is your panel height. Cut all your full-length panels to this height using a circular saw with a fine-tooth blade (cut slowly to avoid melting the vinyl) or heavy-duty tin snips.
Starting at a corner, insert the first panel into the top channel and then gently push the bottom into the bottom channel. Vinyl panels typically have a interlocking “lip” on one side. The second panel will lock into the first. Continue this process, “clicking” each new panel into the previous one, working your way down the wall.
For corners, you will need to cut a panel to the appropriate width. For an outside corner, you cut the panel to fit the remaining space and then install a pre-formed outside corner cap over it for a clean finish. For an inside corner, you may need to trim the interlocking lip off one panel so it can sit flush against the adjacent wall.
Handling Vents, Doors, and Utility Access
You will inevitably hit a spot where you need a panel to go around a pipe, a vent, or a door step. For small obstructions like water pipes or electrical conduits, measure and mark the location on the panel. You can use a hole saw attachment on your drill to create a clean, round cutout just large enough for the pipe to pass through.
For larger openings like crawl space access doors or furnace vents, you will need to build a framed opening. Construct a simple rectangular frame out of treated lumber or metal studs that fits around the access point. Install your skirting panels up to this frame. Then, create a removable panel or door that fits within the frame, using hinges and a latch, so you can still get underneath when needed.
Never permanently seal off utility access points or required ventilation openings for appliances like gas water heaters.
Troubleshooting Common Skirting Problems
Even with careful planning, issues can pop up. Here’s how to handle the most frequent challenges.
If your panels are bowing or bulging, the most likely cause is that the top and bottom channels are not parallel. The space between them is narrower at some points than others. You will need to detach the channel in the problem area, re-measure, and re-secure it to create a consistent gap.
Gaps appearing at the seams between panels are often due to temperature contraction. Vinyl expands in heat and contracts in cold. That’s why you left a 1/4-inch gap at the top during installation. If gaps are excessive, ensure the panels are not pinched too tightly in the channels. In very cold climates, consider a skirting material with less thermal expansion, like concrete board.
Wind getting underneath and rattling the panels is a sign the bottom is not secure. Re-check the attachment of your bottom channel to the foundation. On a gravel base, you may need to drive additional, longer landscape spikes. You can also backfill against the outside of the skirting with a few inches of soil or decorative rock to weigh it down and seal the very bottom edge.
When to Call a Professional
While this is a solid DIY project, some situations warrant professional help. If your mobile home is on a steep slope or has severe unevenness around the perimeter, the foundation work becomes much more complex. If you discover significant rot or structural damage to the home’s underframe while preparing to install the top channel, stop and address that first, which may require a contractor.
If you are uncomfortable working with electrical lines, gas pipes, or plumbing while cutting access holes, it is always safer to hire a technician to create those penetrations for you.
Maximizing the Benefits of Your New Skirting
With the last panel snapped into place, your job isn’t quite finished. To get the full value from your investment, consider these final steps. First, ensure there is adequate ventilation. Most building codes require a minimum number of vent openings in the skirting to prevent moisture accumulation, which can be worse than having no skirting at all. Install a vented panel every 10-15 linear feet.
For added insulation, you can install foam board insulation against the inside of the skirting panels before backfilling. This creates an insulated air pocket under your home, significantly improving energy efficiency. Just ensure you do not block any of those critical ventilation openings.
Finally, take a walk around your home. Enjoy the finished, tidy appearance. More importantly, listen on a windy night. The drafts should be gone. Check your energy bills over the next few months; you should see a noticeable difference. Your mobile home is now better protected, more efficient, and more valuable, all thanks to a well-executed DIY project.
Your new skirting is a long-term investment in your home’s comfort and integrity. With proper installation on a solid base, it should last for decades with only occasional cleaning. Now you can relax, knowing the space under your home is sealed, secure, and working for you, not against you.
