I am going to reside a home with western red cedar using stainless steel nails. I'm debating the flashing material to use (copper, aluminum, or even stainless). Is there an issue with galvanic corrosion in areas where the SS nails penetrate the flashing of a dissimilar metal? Also, has anyone used the rain slicker product made by Benjamin Obdyke rather than furring strips?
Flashing Materials
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I usually use double dipped hot galvanized nails. Usually we use aluminum, but have used copper when the owner is willing to pony over the bucks. SS and copper DO play nice together and you shouldn't worry about that.
I have used their House slicker and like it. It installs easier than furring, and accomplishes the same thing, and most guys in my area have no idea what it is so when I go into a job showing it I already have a leg up.
I have used their House slicker and like it. It installs easier than furring, and accomplishes the same thing, and most guys in my area have no idea what it is so when I go into a job showing it I already have a leg up.
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106 Posts
I use only ss nails, for clap siding and hot dipped galv. roofing nails for shingle or shake siding, since they are not exposed.
Copper and stainless steel do not react to each other, but hot dipped galv. and copper will react. Not sure if electro-galv. reacts with copper? Since their properties are different (hot dipped & electro-galv) that is.
For clap siding, I run furring strips 8" o.c., but I only nail on the 16 o.c.'s and on shingles/shakes I run 1/4" x 2" horizontal nailers that the shingles/shakes nail to. I space them according to the exposure of the shingles/shakes. The nailers allow for an extra breathing space just like the furring strips.
Running the furring strips 8" o.c. minimizes warping of the siding, for those who are scratching their heads, wondering why!
Copper and stainless steel do not react to each other, but hot dipped galv. and copper will react. Not sure if electro-galv. reacts with copper? Since their properties are different (hot dipped & electro-galv) that is.
For clap siding, I run furring strips 8" o.c., but I only nail on the 16 o.c.'s and on shingles/shakes I run 1/4" x 2" horizontal nailers that the shingles/shakes nail to. I space them according to the exposure of the shingles/shakes. The nailers allow for an extra breathing space just like the furring strips.
Running the furring strips 8" o.c. minimizes warping of the siding, for those who are scratching their heads, wondering why!
Any 'dis-similar' nails will 'eventually' react, - - but SS will react the least, - - then 'hot-dipped', - - then 'EG', - - reason being the hot-dipping process leaves a much thicker coating then the EG process.
SS nails are the 'all-around' way to go no matter which flashing you use, - - myself, I would use copper as the flashing for a top quality job.
SS nails are the 'all-around' way to go no matter which flashing you use, - - myself, I would use copper as the flashing for a top quality job.
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106 Posts
I agree with Tom R. about the copper flashing. That is all I use when siding with wood.
It looks the best and if your doing an older home it is historically correct. Unless you want to use lead, which they did in the old-days too!
It looks the best and if your doing an older home it is historically correct. Unless you want to use lead, which they did in the old-days too!
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