Tie-downs loose, rusted, or missing: how to check and what it costs

Anchoring is the part of a manufactured home nobody looks at, sitting in damp ground under skirting that hides it. It is also the part that matters most when a storm comes up the Valley, and the part that settling quietly undoes.

The three-minute check

With a flashlight, from an access panel or an open corner of the skirting:

1. Is the strap tight? You should not be able to move it by hand. A strap you can wobble is doing very little. Slack straps are the most common finding, and they come from the home settling: as the piers move, the distance from the frame to the anchor head changes, and the strap loosens.

2. Is the metal sound where it enters the ground? This is where they fail. A strap that looks perfect at the I-beam can be substantially gone at the soil line, where wet ground and air meet. Same for the anchor head. Poke it.

3. Is there a strap near each end of the home? The Texas rule wants one within 24 inches of each end of each I-beam, and a missing end tie is the commonest omission on older installs.

Then count what is there and compare it with the tie-down cost calculator, which works out roughly what a home your size should have under the Wind Zone I table.

What the rule requires

Hidalgo County is HUD Wind Zone I. The federal standard at 24 CFR 3280.305 names the fifteen Texas counties in Wind Zone II, designed against 100 mph winds, and Cameron and Willacy are the nearest of them; Occupations Code section 1201.256 puts every other county, ours included, in Zone I.

The Texas anchoring standard in 10 TAC 80.24 sets the rest. Diagonal tie spacing depends on the home’s width and how high the I-beam sits above the anchor head: a 14/28-wide home with a 30 to 40 inch vertical distance may have ties up to 10 feet apart, a 16/32-wide up to 12 feet. End ties must be within 24 inches of each end of the I-beam. No two anchors may be within four feet of each other. Straps are 1.25 inches wide and 0.035 inches thick, rated for a 3,150-pound working load. Anchors must be corrosion resistant, and a licensed installer may not put re-conditioned anchors, straps, or clips on a new installation. The full table is on our Texas tie-down requirements page.

Why this matters in Hidalgo County

Both hurricanes that reached us in the last twenty years stayed inside Zone I’s design assumptions, and homes anchored to the table rode out the wind. Dolly in July 2008 gusted to 71 mph at the Weslaco airport, 60 at Edinburg’s, and 52 at McAllen Miller. Hanna in July 2020 gusted to 60 at McAllen, 59 at Weslaco, and 54 at Edinburg.

Homes with slack, rusted, or missing ties did not have that margin. And what both storms left behind is what does the long-term damage: Hanna dropped 14.40 inches on a gauge northwest of Mission and left 18 inches to four feet of water standing east of Edinburg, and the June 2018 storm put 18.31 inches west of Mission. Ground that wet holds an anchor differently, footings press in, the home drops, and every strap under it goes slack at once.

What goes wrong, in order

The clay row is the Valley-specific one. South of Business 83 the ground shrinks through a 99.6-degree August and swells in a 4.61-inch September, and an anchor driven into it in spring can be standing in an open crack by late summer.

The connection to leveling

These two problems arrive together and for the same reason. The ground moves, the piers move, the home moves, and as it moves the straps slacken. So a home that needs releveling frequently has anchoring that has lost tension, and a home with slack straps is usually telling you it has moved.

Which is why the cheapest moment to deal with anchoring is during a relevel, when the crew is already underneath and the skirting is already off. Re-tensioning is included with every relevel, and replacing individual anchors while everything is open is far cheaper than a dedicated trip. If doors have started sticking, read doors and windows sticking, because that is the other half of the same inspection.

What it costs

Published on the pricing page.

Licensing, which is not optional here

Texas licenses manufactured home installers, and Occupations Code section 1201.003(13) puts “securing, anchoring” inside the definition of installation. Ask for the licence number in writing, verify it is current with the state, and ask separately for the insurance certificate. The installer licensing page covers how.

This is one of the places where the licence matters most in practice, because anchoring is invisible once the skirting goes back on. You will not be able to tell good work from bad by looking, which means you are relying entirely on who did it.

What to expect on the call

Photos from underneath if you can get them, roughly how many straps you counted, whether they are tight, what the metal looks like at the ground, the home’s width and length, and roughly when it was set. If you do not know how to get underneath, say so; part of the free level check is looking at exactly this.

We cover Edinburg, McAllen, Mission, Pharr, San Juan, Alamo, Donna, and Weslaco.