155,661 views ·
317 replies
156k views
317 replies
Warning for Biltema's decking screw
Sorry, I wrote the wrong question, it should be why, not who?J Johan byggare said:
It seems better to me to buy a screw that is made of stainless steel and is tough. The C4 screw only has a protected surface and is hard and breaks easily. Made from the worst steel. It was developed to be cheap. Or have I misunderstood this?
And how is a regular consumer supposed to know that?T tobbbias said:Sorry, I wrote the wrong question, it shouldn't be who but why?
It seems better to me to buy a screw that is made of stainless steel and is tough. The C4 screw only has a protected surface and is hard and easily breaks. Made of the worst steel. It is designed to be cheap. Or have I misunderstood this?
I agree. Now I know that C4 is a worse choice, but when I bought from byggmax:
"Hardened wood screw with countersunk head for use both indoors and outdoors. Surface treated with Protect 4 to withstand tough environments."
I didn't think that several screws would break when I built a temporary scaffold with little load. I screwed planks tightly against studs and when I dismantled, many screws had broken, which wasn't noticeable when I screwed them in.
"Hardened wood screw with countersunk head for use both indoors and outdoors. Surface treated with Protect 4 to withstand tough environments."
I didn't think that several screws would break when I built a temporary scaffold with little load. I screwed planks tightly against studs and when I dismantled, many screws had broken, which wasn't noticeable when I screwed them in.
Member
· Sverige
· 5 652 posts
I haven't had any problems with Biltema's stainless decking screws (A2) at least. They have a relatively soft steel quality and aren't likely to break due to any movements in the wood. They are also quite soft in the head, but for the purpose of decking, I think the durability of the Torx is sufficient. But yes, here and there a screw has broken during assembly; they can't handle everything.
Some sections of the frame were screwed with thicker 6 mm outdoor wood screws C4 from Biltema 120-140 mm T-25 Torx and in a significantly harder steel quality, which worked excellently over time as well. As for their anchor screws in fittings, no problems at all; I would rather say they are extremely strong screws. I have only used regular powerful screwdrivers and not impact drivers.
I would advise against using screws made of very hard steel in constructions that move, like decking, regardless of whether it's Biltema or another manufacturer.
Some sections of the frame were screwed with thicker 6 mm outdoor wood screws C4 from Biltema 120-140 mm T-25 Torx and in a significantly harder steel quality, which worked excellently over time as well. As for their anchor screws in fittings, no problems at all; I would rather say they are extremely strong screws. I have only used regular powerful screwdrivers and not impact drivers.
I would advise against using screws made of very hard steel in constructions that move, like decking, regardless of whether it's Biltema or another manufacturer.
In general, stainless steel has significantly worse strength than "regular" steel.
I also have very bad experience with both Biltema's nails and screws. The screws break, and the nails are soft and uneven on the surface. The uneven surface is a DISASTER for, for example, nailing battens through surface paper!
The stainless ones, however, have not broken straight off but have twisted off when they've hit a hard knot, etc. The German nails at, for example, Hornbach are significantly better, but far from as strong as nails from, for example, Skyllberg and brand-name nails that I can't remember the name of.
I also have very bad experience with both Biltema's nails and screws. The screws break, and the nails are soft and uneven on the surface. The uneven surface is a DISASTER for, for example, nailing battens through surface paper!
The stainless ones, however, have not broken straight off but have twisted off when they've hit a hard knot, etc. The German nails at, for example, Hornbach are significantly better, but far from as strong as nails from, for example, Skyllberg and brand-name nails that I can't remember the name of.
Essve obviously has big issues with some of their screws. https://jarnbyggfarg.se/nyheter/743-kunder-klagar-essves-skruvar-gar-avHenrik Nordlander said:
I have used cheap, stainless decking screws (Byggmax, Biltema, Jula) for the 130 sqm decking I have laid. Not a single one has broken.
Member
· Sverige
· 5 652 posts
But do you think Biltema's stainless decking screws are worse than those from, for example, Byggmax or anywhere else?
I don't think so. Sure, there's no problem breaking a decking screw in A2 stainless from Biltema, but I think the same applies to other stainless decking screws from other suppliers. Stainless screws that get stuck in a knot will inevitably break from my little experience, it's not "real steel" we're talking about at all.
I don't think so. Sure, there's no problem breaking a decking screw in A2 stainless from Biltema, but I think the same applies to other stainless decking screws from other suppliers. Stainless screws that get stuck in a knot will inevitably break from my little experience, it's not "real steel" we're talking about at all.
Use only stainless steel (A2 normally, A4 coastal) and never anything else for decking. It moves too much and everything else is too hard.
Buy stainless regardless of brand for minimal difference.
Marketing C4, etc. as "deck screws" is foolish. According to Essve, they work excellently under a roof where movements are not as significant, but not out in the open. It's not about the brand but the fact that they are not as flexible as stainless steel (A2 or A4).
Always buy stainless for decking, in other words.
Buy stainless regardless of brand for minimal difference.
Marketing C4, etc. as "deck screws" is foolish. According to Essve, they work excellently under a roof where movements are not as significant, but not out in the open. It's not about the brand but the fact that they are not as flexible as stainless steel (A2 or A4).
Always buy stainless for decking, in other words.
Last edited:
It was discussed last summer
https://www.byggahus.se/forum/threads/problem-med-trallskruv-som-gar-av-ejot.317311/
ESSVE recommends C4 for indoor decking that DOES NOT move!
There is only one decking screw that will suffice, A4 possibly A2 which is a bit harder but cannot withstand coastal/pool climates and large movements.
My decking 34x145 is completely together in the spring and has 8 mm gaps during a dry summer, the screws should bend like an s by 4 mm every year, so far none have broken!
https://www.byggahus.se/forum/threads/problem-med-trallskruv-som-gar-av-ejot.317311/
ESSVE recommends C4 for indoor decking that DOES NOT move!
There is only one decking screw that will suffice, A4 possibly A2 which is a bit harder but cannot withstand coastal/pool climates and large movements.
My decking 34x145 is completely together in the spring and has 8 mm gaps during a dry summer, the screws should bend like an s by 4 mm every year, so far none have broken!
