Underlayment nail length?

[thunderhead]

I am putting down some 1/4" underlayment. The directions for it say not to use nails that will go all the way through the flooring. My floor is 3/4" plus 1/4" underlayment. The shortest nails I can find are 1 1/4". Is there a problem with the nails being too long? Thanks

 

[Terry]

They do make some shorter nails for that. Problems you can have with long nails? Sometimes you hit plumbing pipes or wiring if the nails are too long.

 

[Sponsor]

 

[thunderhead]

Thanks Terry, My local Menards only have them to 1 1/4. If hitting something is the only problem I am ok. I was not sure if maybe the exposed nails might wick water or something else.

 

[Jadnashua]

It's useful, if you aren't going to hit something below, if the full diameter of the nail shank penetrates the materials. Especially if you're using ring-shank nails, that gives you the most grip verses that part of the nail point.

 

[Cacher_Chick]

Most of the flooring companies have switched to shooting adhesive-coated staples vs. nails for underlayment.