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Accessible living · Small jobs, done in a day

Blocking retrofit

Putting structure in the wall so a bar can go anywhere on it, now or in five years. Best done while the wall is open.

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One flat fee to find out what is wrong. You are told it on the phone before anyone is dispatched, and it comes off the job if you hire us. Read our Plain Terms

A shower stripped back to the studs, the valve set and the floor prepared
The moment to put blocking in the walls. Southern California.

What the work is

Blocking is timber or a steel plate fixed between the studs, behind the finish, so a bar can be anchored anywhere along it rather than only where a stud happens to be.

It is close to free during a remodel and a real job afterwards. Adding it later means opening the finish, which is why we ask about it on every bathroom job whether or not anyone has mentioned accessibility.

Where the wall cannot be opened, there are rated surface solutions. We will tell you what each option holds.

What is included

  • Opening the finish where required
  • Blocking or steel plate fixed to the framing across the useful span
  • Closing up to a paint-ready finish
  • A written record of where the blocking runs, so a future bar goes in the right place
  • Photographs before it is closed

What is not

  • Painting
  • Re-tiling a wall that has to be opened. We will tell you the cost before we start
  • The bars themselves, which are quoted separately

Ask for the photographs

Once the wall is closed, nobody can see where the blocking is. The photographs and the written record are what make it useful in five years' time, and they are the part most people forget to ask for.

What to ask anyone quoting this, us included

  • How far does the blocking span?
  • Will you photograph it before you close it?
  • What load will a bar anchored to it hold?

What we can show you in writing

Every line traces to a document we read in full. The number after a sentence points to the research below.

  • Where federal and Utah law mention grab bars at all, what they ask for is reinforcement in the wall for a later installation — not bars. That rule applies to buildings of four or more units, not to your house. It is still the clearest statement anywhere that the blocking is the real work and the bar is the easy part.1
  • Even where the standards do reach a dwelling unit, they let reinforcement stand in for the bars themselves: put the blocking in, and the bars can come later, wherever they turn out to be wanted. That is the argument for doing it while a wall is already open for something else.1
  • HUD's design manual puts the minimum reinforced area at 6 inches by 24 inches behind and beside a toilet, and then says in its own text that the minimum is not enough — 42 inches is the preferred length on a toilet side wall, so a longer bar or a different position is still possible years later.1
  • Blocking sized to the bar is the common mistake, and HUD says so in its own manual. Its minimum reinforced band runs from 32 inches at the bottom to 38 inches at the top — and HUD's own text warns that this minimum is not enough, because a bar mounted at 33 inches puts its plates below the band and the screws finish in drywall. HUD recommends at least two more inches at the bottom, and says larger is better.1

Where this comes from

Every line above traces to a document we read in full. The number after a sentence points to the research below; hover it for the section. If you find a line wrong, tell us and we will fix it and say so.

  1. Accessible construction research, September 2026 Compiled from the US Access Board's ADA and ADAAG texts and the 1984 Uniform Federal Accessibility Standards, the Code of Federal Regulations, HUD's Fair Housing design guidance, the Utah Code, ASME and ASTM standard scopes, the Tile Council of North America on slip resistance, and the CDC and National Institute on Aging. 3 sections cited. Hover a number above for the section.

Read before you decide

The rest of small jobs, done in a day

The quote is the number. There is no second number.

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