Warning for Byggmax screws!

[MagHam]

Yes, it's not always the best screws available on the market, but people often tighten all types of bolts and screws with too much torque.

 

[Metafor]

I unfortunately have to issue a warning for the screws that Byggmax recommends and sells for Cembrit Multiforce boards. The screws do not work on steel studs, even though they are recommended by Byggmax for this purpose.

The thread is simply too short and the entire thread goes through the steel stud before the board is fastened to the stud. It's incredibly poor and sloppy of Byggmax to sell such "crap." And this despite Cembrit themselves offering custom-made screws in the same price range as Byggmax's incorrect subpar screws. (At least the price of the Cembrit screws at Beijerbygg is in the same price range...)

They also claim it is self-drilling, which it is not.

Byggmax as usual is not worth the trouble.

[image]

Which screw does Cembrit offer and where? I checked their website but can't find it. Link?

 

[PiC]

I have to say that I have good experiences with Byggmax's screw assortment. Their C4 screws are really good!!

 

[tompajo]

Snickerick, it looks like you're holding the screw too far into the board, and the picture is angled in such a way that it makes it difficult to determine if what you're writing is correct. The screw head should be flush with the surface of the board, and from what I can see, it should work. I work professionally in the industry and have tried most screw brands available, and in my opinion, Byggmax has the most affordable all-around screws. They have a C4 classification, which means they have really good rust resistance. They are unusually durable. I use them for most things both indoors and outdoors and have done so for several years. As several have already pointed out regarding anchor screws, they are tightened too much if the heads break off, or alternatively, a screw intended for indoor use is used where they are exposed to moisture. Stainless steel screws are also much more sensitive to incorrect torque during installation than non-stainless ones.

 

[Anonymiserad 173289]

Yes, the screws in the market are not always the best, but often people over-tighten bolts and screws of all types.

That's certainly true. We always feel like tightening so it holds, so to speak. The problem is that there's no margin left to handle the forces that occur later due to movements in the construction.

I think what's missing is a description of the torque the screws should withstand in most cases.
Essve doesn't even list the torque, even though they mention using the torque function on the screwdriver: http://essve.se/files/2017/06/Stora-skruvguiden_170519.pdf



EDIT: To reconnect to TS: I probably didn’t understand your problem. Did you tighten too hard so that the threads pulled up the hole in the metal stud?

 

[elpaco]

I use budgethandlarnsd screws only for things like template building. Otherwise, it's essve or Gunnebo. I'm not saying I can determine if it's reasonable from a quality/price standpoint, but I don't want to take chances with screws. I have neither the desire to redo things nor the risk of it collapsing, and overall, the price difference for screws is a small part of the total cost.

 

[oxxen]

I have used some Biltema anchor screws and what I have noticed is that the heads come loose/break off quite easily if the screw goes in just a little crooked. Almost as if they were hardened too much so that they became brittle...

 

[Husqvarna220Ac]

I think the screw is doing exactly what it should, screwing through, way too long.

 

[Tiger79]

What length screw did you test with?

 

[tanker]

Byggmax's new floor screw is also crap. It says Torx10 on the package, but no bits fit the screw at all, their old floor screw with square bits was completely fine though.

 

[KnockOnWood]

The question is whether you tightened with too much torque?

Hardly. Regular battery-powered screwdriver. I've never broken any other screws.
And note, they didn't break immediately during assembly, it was discovered after a while.

Were the screws tightened in any special way? Impact driver?

Nix

 

[fixarpelle]

Many people seem to have issues with ankarskruv.
I have used ankarskruv from Biltema, Byggmax, or sometimes from Ahlsell, and I use C4 classified screws.
I have used non-C4 classified ankarskruv indoors, but I prefer C4 screws as I believe they are better.
I don't have the problems described, but I fasten with screws and nail the rest.
Sometimes I wonder if those of us who nail are becoming fewer and fewer; I like to mix screws and nails as they have different properties.

 

[flygrc]

I have used many different variants from Byggmax without any problems. Well, maybe one thing, I think their decking screws are a bit too soft in material.

 

[Snickerick]

EDIT: To follow up with the original poster: I probably didn't understand your problem. Did you overtighten so the threads pulled up the hole in the metal stud?

One could say the problem is that the distance from the screw head to where the thread ends (or begins, depending on how you see it) is too long, more than 9mm + the sheet metal thickness. So the entire threaded part goes through the metal stud before the sheet is fastened against the stud. It creates a gap, the screw just spins, and the sheet is not secured.

 

[Snickerick]

Guessing that the screw is for 12 mm boards but TS has bought 9 mm boards.

Instead of guessing, you can read the thread and check the Buildmax website.

They only sell 9mm boards, and the screw is sold together with the board on their website!

On the other hand, feel free to link to the screw you mean should be bought at Buildmax for the 9mm boards they sell.