Counter-sinking lag bolts

[Nick Hull]

Liquid Ivory soap works great

[nospambob]

[Glenn]

While I doubt that, we are talking about lag bolts, right? A skift of rust will just make them hold better and in wood they may rust out in 150 years instead of 152 years.

[Chris Lewis]

According to Glenn :

You'd be surprised how quickly fasteners can corrode out in PT lumber if not chosen correctly. Eg: on the deck I was repairing on the weekend, some #10 screws lasted less than

3 years.

Double-dipped galvanized or stainless is the way to go.

If you're using ordinary galvanized, a wax coating might make quite a bit of difference.

[JerryD(upstateNY)]

Whatever they are now using to PT lumber will corrode a regular nail or screw within a few years. You MUST use double dipped galvanized or Stainless steel fasteners or you will have a mess in a few years. Because people didn't know this when the new PT lumber came out, there are many decks built with the wrong fasteners which will nedd major repairs.