Adhesive residues from carpet

[John79]

Hello!
Does the floor need to be sanded after the carpet is thrown out? I have scraped the entire surface with a putty knife. I am planning to lay a new carpet. But I am wondering if the glue from 1970 could cause any issues?

 

[Richard Bygg]

To begin with, save your knees and back with a barkjärn if you are going to continue manually. https://www.jula.se/catalog/tradgar...J_3Rx1No6XK4aor2OnDy7wMiAChyMP_waAqCkEALw_wcB

 

[John79]

Yes, that was a good tip. A smaller putty knife took a while. But the question is whether the rest of the glue must be removed before a new carpet is installed??

 

[Richard Bygg]

When I do that and use a barkjärn, I usually sharpen the edge on it with an angle grinder I can add...

 

[Richard Bygg]

It probably depends on how much fluff your carpet has. If it's like the fur on an animal, then the answer is probably no, but if it's a fairly thin carpet, it might show through.
It doesn't exactly appear to have any significant height, and I assume you're not going to glue the carpet either, so there's no danger of it not adhering to the surface.

Another option is a floor sander if you get tired of it; it can be done in 10 minutes...

The easiest thing is if you have a piece of carpet, lay it on the floor, stand on it, and see if it feels like it shows through...

 

[Dowser4711]

If you rent a floor sander, a tip is *not* to rent a "motorized bark scraper" (can't remember what it's called, it was almost 20 years ago).

It is an option that works the same way as your putty knife and is great if you have concrete floors and want to get rid of large amounts of glue. It doesn't clog up the same way the sander can if there's a lot of glue/foam rubber. When I happily, after that experience, tried to use it on particleboard flooring, there was quite a bit of patching to do afterward...