Which nails should I use for 25mm boards?

[Yrrol]

I'm going to replace some bad 25mm boards that act as an under-roof on a building.

But how do you choose the right nails?
Do you base it only on the thickness of the boards or also on the thickness of the beam? (8cm)

 

[hempularen]

I have the impression that there is a rule of thumb that the nail should be three times as long as the thickness of the board.

 

[hantverkare1]

I remember there is a rule of thumb that the nail should be three times the length of the thickness of the board.

Correct. 3" (75 mm) nails fit perfectly.

 

[Yrrol]

Should it be a specific nail or is there usually only one type to choose from?

Thinking of galvanized, ridged and whatever else is available.

 

[hantverkare1]

Should it be a specific nail, or is there usually just one type to choose from?

Thinking of galvanized, ribbed, and whatever else is available.

Regular galvanized works fine

 

[Larsa]

You should have a 75mm galvanized wire nail. It and the 100mm are type "universal nails" used for most things.

 

[Yrrol]

Going to mount regular 22mm boards now, both as paneling and fascia boards.

22x3= 66mm

Planning to go and buy Biltema's nail gun.

Would you have chosen the 65mm (mathematically correct) nails then or 75mm?

 

[Mikael_L]

Galvanized 75mm wire nails will work great.

65mm will probably work fine too. It may also depend a bit on what is being nailed. Say it's 170mm boards being nailed with 2 nails on each framing stud compared to 120mm boards. Then 65mm nails might suffice for the 120 boards if 75mm nails are suitable for the 170.

Personally, I've nailed quite a lot of 22mm paneling and boards with the nail gun and Gunnebo's galvanized 65mm nails. But sometimes used 75mm. I haven't given it much thought, it's often just whatever package is closest, kind of.

 

[Yrrol]

Good response. The wind boards are 170 and require some single nails. The panel is 145 and is double as per the rule. I'll probably buy 75mm nails to be more on the safe side.

They call theirs hot-dip galvanized but I suspect it's the same as galvanized. Haven't read that people hated Biltema nails, but saw that it worked with other nails in their gun, though I forgot where they bought the alternative.

 

[Oldboy]

Hot-dip galvanized and galvanized are usually the same thing. It's for outdoor use.
There is also electrogalvanized, but it's not suitable for outdoor use.

For end grain in general and fascia boards in particular, I would choose 4" / 100 mm nails. Nails don't hold as well in end grain because they go along the fibers. Additionally, fascia boards and the ends of battens are particularly exposed to weather conditions.

 

[andersmc]

I think nails shot with a gun hold harder than nails hammered in. For that reason, I tend to go for the shorter dimension.

Then it's a question of what you are nailing into. If you're nailing the panel into a grid panel, 28 mm thick, your 75 mm nail will protrude 25 mm on the back side and possibly puncture the wind barrier.

I've nailed quite a bit of panel with 50 mm nails, and it hasn't fallen down yet, after 20 years.

I usually screw the wind boards fast.

 

[Yrrol]

Feeling a bit anxious. Tomorrow, the plan is to create a new wall panel. About 80 pieces of 21mm boards in an exposed environment (sun).

Thinking that screws will hold them better in place when the sun beats down in summer.

All stores only sell Essve nowadays, and I would guess;
ESSVE Deck Screw Classic for wood frame, CorrSeal
http://katalog.essve.se/article/?katBid=V70&dokId=wc519820&artNr=

It feels tricky to hold the board at the same time as nailing manually.
On the other hand, I could go buy that Ikea nail gun but...

Need a smart plan to not lose motivation tomorrow.
Thinking of taking a scrap piece. Put two nails in it and maybe some cabinet handle... that'll make it an easy-to-hold tool for creating the right distance between the panel boards if nothing else.

 

[verktygsgurun]

I probably think that 3 nails sit better than a deck screw due to the design of the head, and it also looks much nicer with a nailed panel. The lengths of the nails have been discussed in the thread, but what hasn't been discussed is that the thickness of the nail follows the length of the nail. That is, there's a big difference in how a 50 mm nail sits compared to a 75 mm one due to the thickness.

 

[Lolight]

I recall there is a rule of thumb that the nail should be three times the length of the board's thickness.

Well, it depends. It depends on what it is fastening to. If the substrate is not thick, that won't work. You shouldn't penetrate through what you're nailing into. Otherwise, it's said that up to double the length in the fastening material is normal. So, a 20 mm board should then be fastened with a 20+40 mm = 60 mm nail.

The nails you can use indoors are regular wire nails or nails with rounded heads, as they look a bit nicer. Galvanized isn't needed indoors.

 

[Yrrol]

Now, there might be a difference with loose nails. But I checked Biltema's nails for the gun and they were the same thickness. 50x2.8 and 75x2.8

The studs are 195mm deep, so there's plenty of wood anyway.