Forever Dust
I bet that's a term you'd never expect in a new home. But it's definitely a 'thing.'
Not just a thing either, it's common and if you have built, you would be familiar with how dirty a home building site can get.
Steel Frames Are Basically 'Dust Hotels'
If your home is going up on steel frame, those frames are shaped like a "U" along the bottom. Cute little channel. Great for structural integrity. Also an absolute five star resort for dust, screws, off cuts and whatever else the trades dropped and couldn't be bothered chasing.
Tradies will give the site a sweep. That's the job.
But nobody is climbing inside your frames with a vacuum and a torch doing a deep clean for free, because that was never in the scope. So the dust just sits there. Waiting. Patient. Smug.
Then the plasterer arrives, sheets go up, and congratulations - that dust has just been sealed into your walls. FOREVER. Not "until the next clean." Forever, forever.
It is now a permanent resident of your home, living rent-free.

The photos above were actually 'pretty good', compared to the rest of the frames.
Why This Actually Matters (Beyond the Ick Factor)
I know, I know. Dust in a wall cavity sounds like a very "who cares" problem when you're busy trying to sift through the builder BS.
But here's the thing.
That dust is fine particulate. It doesn't stay politely inside the frame forever, no matter what the name suggests. House movement, temperature swings, air pressure changes, someone drilling a picture hook in five years' time.
All of it can nudge that dust loose and send it drifting into the air you and your kids are breathing.
Vents and ducted systems can carry it further still, redistributing it through the house like an unwanted subscription service nobody remembers signing up for.
So no, it's not dramatic to care about this. It's just common sense wearing a hi vis vest.
What I Did About It?
During an inspection of our own steel frames, we found dust and debris build up sitting at two centimetres thick in places. Plus screws. Plus bolts. Plus the kitchen sink - pun intended.
Our supervisor was upfront. The trades would do their best to clear the obvious stuff, but detailed vacuuming inside the frames was not standard practice. Not a builder failure. Just the reality of how the industry runs. Interesting.
I was not about to "accept" that as the final word. With the builder's approval, ( and yes - we did sometimes happen to end up onsite 'accidently' passing by with cleaning tools) we went on site ourselves and vacuumed those frames and the surrounding floor areas out completely. Took a weekend.
Was absolutely - Unequivocally worth it.
This is the whole Abeaud philosophy in one dusty little nutshell. That a woman who understands the system cannot be dismissed by it.
So What Are Your Options, Practically Speaking
You've got three real paths here, and none of them involve just quietly hoping for the best.
🧹 Talk to your builder. Raise your cleanliness expectations early, specifically around structural cavities. It might not be standard, but plenty of builders will accommodate extra cleaning for a cost if you ask before the walls close it all in.
🧹 Bring in the professionals. Construction cleaners exist for exactly this reason. Proper equipment, proper technique, and they'll go into the nooks your average site sweep will never touch.
🧹 Get on site yourself, with approval. If you're capable, willing and given the green light, sometimes the most thorough clean is the one you do with your own two hands and a very determined attitude.
The Bottom Line
Builders aren't obligated to clean out every cavity before it's sealed. That's not a scandal, it's just the standard. But standard doesn't mean set in stone, and it definitely doesn't mean you have no say.
The clean matters just as much as the concrete, the frame and the finishes. It's the part nobody photographs for the reveal video, and it's the part that decides what kind of air your family breathes for the next thirty years.
Ask about the dust before it becomes a permanent tenant.