Mobile Home Anchors: A Tie-Down & Safety Guide
Mobile home anchors are steel ground anchors tied to the home’s frame (and on some homes, over the roof) with steel straps, so wind can’t slide, lift or roll the home off its piers. How many you need and where they go comes from the home manufacturer’s installation instructions and your HUD wind zone (I, II or III), which is shown on the home’s data plate.
What mobile home anchors do, the main anchor and tie-down types, how HUD wind zones work, the basic installation steps, and what to check on an older home.
Over the years I’ve seen plenty of mobile homes with loose, rusted, or missing anchors — and a few that paid the price in a storm. Proper anchoring is a basic installation requirement and an important part of protecting a manufactured home from wind. This guide covers anchor types, wind zones, installation basics, and an inspection checklist.
Why Mobile Home Anchors Matter
Mobile home anchors are the stabilizing systems that secure your manufactured home to the ground, helping keep it from shifting, sliding, or being lifted during high winds and storms. Unlike traditional site-built homes that sit on deep foundations, many manufactured homes rest on piers or blocks — making them lighter and more vulnerable to wind forces.
Strong winds can get underneath a mobile home and create uplift, while wind passing over the roof acts like an airplane wing, pulling the structure upward. Without a proper anchoring system, storm winds can push a home off its piers or, in the worst cases, roll it over. HUD’s Model Installation Standards (24 CFR Part 3285) set minimum requirements for the initial installation of new manufactured homes, including anchoring against wind. More background is available from HUD’s Office of Manufactured Housing Programs.
This is what can happen when mobile home anchors fail or aren’t installed — high winds flipped this home off its foundation. Properly installed tie-downs greatly reduce this risk.
FEMA has guidance on checking manufactured home tie-downs on a regular schedule, more often for homes near the coast, and after any major storm. Corroded, loose, or missing anchors are one of the most common — and most dangerous — problems I run into when buying mobile homes.
Important safety warning: Never move, re-level, or make structural changes to your mobile home without first checking your anchor system. Disturbing the blocking or piers without re-securing tie-downs puts your home and family at risk. Check with your local building department for the requirements in your area.
Anchors are not a storm shelter. A good tie-down system reduces the chance of a home shifting or rolling, but no anchoring system makes a manufactured home safe to stay in during a tornado or major hurricane. Follow local warnings and evacuation orders, and know where your nearest shelter is. More in the mobile home tornado safety guide.
Types of Mobile Home Anchors
The right anchor depends on your soil type, your foundation, and your wind zone — and on what the home manufacturer’s installation instructions call for. Here are the main types:
A close-up of a mobile home ground anchor — these steel anchors are screwed or driven into the soil to hold the home’s tie-down straps.
Auger (Screw-In) Anchors
The most common type for mobile homes. These corkscrew-shaped steel anchors are twisted into the ground. Different auger sizes and lengths are made for different soil classes, and they only reach their rated holding power when installed to full depth — with a stabilizer plate if the anchor’s listing calls for one.
Concrete Slab Anchors
Used when the home sits on a concrete pad, slab, or runners rather than bare soil. These attach to the concrete with anchor bolts or cast-in fittings. Use only a system that is listed for this use and installed per the manufacturer’s instructions.
Rock Anchors
Made for homes installed over rock or coral-base ground. They are drilled and set into the rock where standard soil anchors can’t penetrate deep enough.
Concrete Deadman Anchors
Buried concrete blocks or footings used as anchor points. These are usually put in during the initial setup, often with more permanent foundation installations. They resist well but can’t easily be added after the fact.
A mobile home anchor with a roll of steel wire — this is the hardware that connects ground anchors to the home’s frame or over-the-top straps.
Tip: The soil under your home is one of the biggest factors in choosing an anchor. Sand, clay, rocky ground, and loose fill all call for different anchors. Your local building department or installer can help identify the soil class — don’t just eyeball it.
Shop Mobile Home Anchors & Hardware
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Before you buy, check that any anchor or strap is listed or certified for manufactured home use and suits your soil class and wind zone.
Mobile Home Anchor Kits
Anchor kits with straps, tensioning hardware, and fittings for securing a manufactured home.
Shop Anchor Kits on AmazonAuger Anchors
Screw-in auger anchors for soil installations — the most common style for tie-downs.
Shop Auger Anchors on AmazonHeavy-Duty Anchors
Heavier anchors for tougher soil conditions. Match the anchor to your soil class.
Shop Heavy-Duty Anchors on AmazonGalvanized Strapping
Galvanized steel strapping for tie-downs, which holds up to moisture and soil contact better than bare steel.
Shop Strapping on AmazonUnderstanding Mobile Home Tie-Down Systems
Anchors work together with tie-down straps to make a complete stabilizing system. The anchor is the metal device set into the ground; the tie-down is the whole system — anchor, strap, tensioning hardware, and any protectors or clips. There are two main tie-down configurations to understand:
Over-the-Top (Vertical) Tie-Downs
These straps run over the roof (or down the sidewall) of the home and connect to ground anchors on each side. They are designed to resist uplift — the wind trying to lift the home off its piers. Over-the-top straps are most common on older single-wide homes. Roof brackets or protectors go where the strap passes over the roof edge. Make sure straps don’t block windows or doors.
Frame (Diagonal) Tie-Downs
Frame tie-downs connect the steel I-beam frame rails underneath the home to ground anchors at an angle. They resist both sideways (lateral) and uplift forces. Under HUD’s installation standards, the diagonal strap should sit between 30 and 60 degrees from the ground, and the strap connects to the frame at the points the home manufacturer specifies. Use galvanized steel strapping, which resists corrosion from moisture and soil contact far better than painted or bare steel. HUD’s standards call for 1¼ inch × 0.035 inch or larger steel strapping meeting ASTM D 3953.
Quick reference: How many vertical and diagonal ties a home needs comes from the manufacturer’s installation instructions, which set the maximum spacing for both. Single-wides often have both over-the-top and frame ties. Multi-section (double-wide) homes in Wind Zone I usually rely mainly on diagonal frame ties — but in Wind Zones II and III, HUD requires a vertical tie at each diagonal tie location, whether single- or multi-section. Always check your manufacturer’s manual and local codes.
Mobile Home Wind Zones: HUD Zones I, II and III
Every HUD-code home is built for one of three wind zones defined in 24 CFR 3280.305(c). Wind Zone II covers areas with a 100 mph basic wind speed and Wind Zone III covers areas at 110 mph, both listed by state and county in the rule. Everywhere else on HUD’s Basic Wind Zone Map is Wind Zone I, where homes are designed for a horizontal wind load of at least 15 psf and a net roof uplift of at least 9 psf.
The home’s zone is printed on its data plate, along with a small copy of the wind zone map. A home should only be installed in a zone its data plate allows — a Zone I home can’t go into a Zone II or III area. The HUD Code took effect in 1976, and its wind standards for the higher wind zones were strengthened in 1994 after Hurricane Andrew. To look up the zone for a county, see how to find your mobile home’s wind zone; for help reading the plate, see the mobile home data plate guide.
| Wind Zone | Design Wind Speed | General Area | Anchoring Notes |
|---|---|---|---|
| Zone I | Basic zone (designed for at least 15 psf horizontal wind load and 9 psf roof uplift; no mph figure in the rule) | Most of the U.S., including Michigan, Ohio and Indiana | Tie type, number and spacing per the manufacturer’s installation instructions |
| Zone II | 100 mph | Designated coastal areas (see map in 24 CFR 3280.305(c)) | Vertical tie at each diagonal tie location; longitudinal anchoring on the ends of each section |
| Zone III | 110 mph | Designated hurricane-prone coastal areas (see 24 CFR 3280.305(c)) | Vertical tie at each diagonal tie location; longitudinal anchoring on the ends of each section |
In Zones II and III, homes installed within 1,500 feet of a coastline must be designed for the increased requirements shown on the data plate. The number of anchors a home needs also depends on its length and design — longer homes need more anchor points. You can confirm your home’s wind zone on the data plate inside the home (often in a kitchen cabinet, a bedroom closet, or near the electrical panel).
A close-up of the wind zone section on a mobile home data plate — it shows which wind zone the home was built for.
A full view of a mobile home data plate — wind zone map, manufacturer information, and construction details your installer will need.
For the full federal installation standards, see the Electronic Code of Federal Regulations (24 CFR Part 3285).
How to Install Mobile Home Anchors: Step-by-Step
Some handy homeowners install or replace tie-downs themselves, but your state may require a licensed installer, and having an installer or building inspector check the work is always a good idea. The general process:
Level the Home First
Before installing anchors, make sure the home is level and properly supported on its piers and blocking. An unlevel home puts uneven stress on anchors and straps.
Check Your Wind Zone & the Manufacturer’s Instructions
Check the data plate for your wind zone, then follow the home manufacturer’s installation manual for tie locations and maximum spacing. Treat that spacing as a maximum — never spread ties farther apart than it allows.
Identify Soil Type & Mark Utilities
Find out your soil classification (your building department or installer can help, often with a soil test probe). Then call 811 to have buried utilities — electric, gas, water, sewer, cable, and phone — marked before you put a single anchor in the ground.
Select & Install the Right Anchors
Choose an anchor listed for your soil class. Install each anchor to its full depth, with a stabilizer plate if the anchor’s listing calls for one, and at the angle its instructions specify. In frost-susceptible soil, augers must go below the frost line unless the foundation is frost-protected. Set diagonal straps between 30 and 60 degrees from the ground — a digital angle gauge makes that easy to check.
Attach & Tension the Straps
Connect the straps to the anchor heads and tension them per the anchor manufacturer’s instructions. Use tensioning hardware with closed (forged or welded) eyes, not open hooks that can slip off under load. Tighten evenly, alternating sides, so the home isn’t pulled out of level. Straps should be straight and taut, never kinked. Proper anchor installation tools make this job easier and safer.
Protect Strap Corners
Wherever a strap bends over a sharp edge — such as the roof edge on over-the-top ties — install the protectors or radius clips the manufacturer specifies so the strap doesn’t cut into the home or get cut itself.
Have the Work Inspected
Have your local building inspector or a licensed mobile home installer verify the work. Rules vary by state and even by county, and they can confirm you meet local requirements.
Critical: Open-hook turnbuckles or connectors can slip off under wind load. Use hardware with forged or welded closed eyes, and follow the anchor and home manufacturer’s instructions for every connection.
Installation Tools & Accessories
Anchor Installation Tools
Drive tools and wrenches made for installing mobile home anchors.
Shop Tools on AmazonDigital Angle Gauges
A quick way to confirm diagonal straps sit between 30 and 60 degrees from the ground.
Shop Angle Gauges on AmazonMobile Home Anchor Inspection Checklist
Whether you’re maintaining your own home or buying a used one, run through this checklist at least once a year and after any severe storm (FEMA also recommends checking tie-downs periodically, more often near the coast):
- All straps are tight and straight — no slack, kinks, or bends
- Anchors are at full depth with no visible pullout or tilting
- No heavy rust, corrosion, or damage on straps, anchors, or tensioners
- Tensioning hardware has closed eyes (not open hooks)
- Protectors or radius clips are in place where straps bend over edges
- Straps don’t block any doors or windows
- Frame straps connect securely to the I-beam frame rails
- The home is still level on its piers — no leaning or sinking piers
- Tie count and spacing match the manufacturer’s instructions for your wind zone
- No straps have been cut, removed, or disconnected
Replacing Old or Damaged Anchors
If your inspection turns up corroded, bent, or pulled-out anchors, plan to replace them promptly — don’t reuse damaged hardware. Removing old anchors from the ground is easier than most people think with the right technique and tools.
An easy method for removing old mobile home anchors from the ground — replace them with new anchors suited to your soil and wind zone.
Buying a used mobile home? Always check the anchoring system before you buy. Missing or deteriorated tie-downs are one of the most common issues I see. Some lenders and insurers may require a foundation or anchoring inspection before they’ll approve financing or coverage.
Don’t Forget Your Carport & Attached Structures
One of the most overlooked wind risks on a mobile home lot is the carport, awning, or porch. These structures can act like sails in high winds — and if they aren’t properly anchored, they can tear away and damage your home or a neighbor’s property.
A carport or awning usually needs its own anchoring, separate from the home’s tie-downs, and attached structures should be supported as the home manufacturer’s instructions allow. The basic stakes that come with some carport kits may not be enough for serious wind. If you live anywhere with severe weather, heavier carport anchors are worth a look.
Carport Anchoring Basics
Anchor every carport leg with heavy-duty auger anchors or concrete footings — not tent-style stakes. Use galvanized hardware and check it at least once a year.
Awnings & Porch Covers
Awnings and porch additions need proper post anchoring to concrete pads or deep-set anchors. Check the manufacturer’s instructions before attaching anything to the home itself.
Carport & Structure Anchors
Heavy-Duty Carport Anchors
Ground anchors for securing carports, awnings, and canopies against wind.
Shop Carport Anchors on AmazonAuger Anchors — Multi-Use
Screw-in auger anchors that can also be used for carports and other structures.
Shop Auger Anchors on AmazonInsurance note: Some mobile home insurance policies limit coverage for wind damage to unanchored carports and attached structures, and some insurers ask about anchoring before they write or renew a policy. Check with your insurance provider before a storm, not after.
Would You Rather Sell Than Repair?
If re-anchoring is just one item on a long repair list, selling the home as-is is one option to compare. I buy mobile homes that need work, and you don’t have to fix anything first.
Frequently Asked Questions About Mobile Home Anchors
How many anchors does a mobile home need?
It depends on the wind zone, the length and design of the home, and whether it’s single- or multi-section. The home manufacturer’s installation instructions set the tie locations and maximum spacing. In Wind Zones II and III, HUD also requires a vertical tie at each diagonal tie location. Check with your local building department for any extra local requirements.
Are mobile home anchors required by law?
HUD’s Model Installation Standards (24 CFR Part 3285) set minimum requirements for the initial installation of new manufactured homes, and they require the home to be secured against wind with anchor assemblies or an alternative foundation system. Many states have their own installation and anchoring rules too, and enforcement varies. Contact your local building department to know what applies where you live.
Can I install mobile home anchors myself?
Some experienced DIYers do, but check your state’s rules first — some require a licensed installer — and have the work checked afterward. The hard parts are matching the anchor to your soil, getting full depth, keeping diagonal straps between 30 and 60 degrees from the ground, and tensioning evenly.
How deep do mobile home anchors need to be installed?
To their full depth, per the anchor’s listing — depth varies by anchor and soil, and in frost-susceptible soil augers must go below the frost line unless the foundation is frost-protected. Under HUD’s standards, ground anchors must resist a working load of 3,150 pounds and a minimum ultimate load of 4,725 pounds as installed. A shallow anchor won’t reach that.
What wind zone is my mobile home in?
Check the data plate inside the home (often in a kitchen cabinet, bedroom closet, or near the electrical panel). It names the wind zone the home was built for and shows the HUD wind zone map. HUD defines three zones in 24 CFR 3280.305(c): Zone I (most of the country), Zone II (100 mph areas) and Zone III (110 mph areas), with Zones II and III listed by state and county. The home must be built for the zone where it is installed or a higher one.
Do double-wide mobile homes need over-the-top tie-downs?
Usually not over-the-roof straps — multi-section homes typically use diagonal frame ties along each side. But in Wind Zones II and III, HUD requires a vertical tie at each diagonal tie location, and Zone II/III homes also need longitudinal anchoring at the ends of each section. Follow the manufacturer’s instructions and local codes.