Which is better for attaching furring strips to framing for hanging shiplap siding? Ceramic screws or stainless steel? They’ll have to go through 1/2 playwood + 2″ polyiso rigid foam + 3/4″ furring strip itself before they hit the framing. 3/4″ -1″ into framing should be fine. So a 4″ or 4 1/2″ screw…which material for holding up in weather?
went to home depot for metal roof screws but they only had max widths of 4mm, same as what my roof currently uses. Need a wider diameter (not longer) screw for the roof holes in the wood that have been compromised over the years and will no longer hold a standard size screw. are they available?
what size shank are your old screws?
here is a pdf that shows shank size dimentions
shank is 1″, diameter is 1/4″. diameter of 3/8″ would be ideal
ok, more difficult because #14 or 1/4″ shank is pretty standard.
you would need to replace it with a #17. i have to see if a 1 inch is available.
since you are replacing a screw, you do not need to replace with another self drilling screw
correct, but i do need the type with the rubber washer
maybe people just fill the oversized holes with some type of wood hardener that’s waterproof? i used silicone but it doesn’t hold the screws
i have never heard of anyone doing that in 35 years. they always jump to the next size so the threads can tap again
#17 would be your best bet
i do know that some people who have to replace #14 screws, will jump to a 5/16 lag type screw and put a bonded neo washer on it to seal
no problem. good luck!
Hi, we are going to use dacromat coated screw in one of our project, should we consider any consideration during fastening the screw in order to prevent coat damage?
do you have 3″ TEK screws
yes we do
what shank? what is the diameter? 3/8 would be best
thickest is normally #14, which is a 1/4″ thick shank. It has a 3/8 hex head.
let me give you a link to the page – https://www.allpointsfasteners.com/Tek.html
thanks, thats awesome. thank you for your help
you’re very welcome
what size anchors fits in a hole drilled by a bit size 3/16
what type of anchor are you looking to buy?
zinc hammer drive
ok, looks like you would use a 3/16 hammerdrive. we have those in 3/16×7/8 – https://www.allpointsfasteners.com/HammerdriveAnchors.html
hi, can you tell me the difference between tek 3 and tek 5 screws?
yes, a tek 5 can go through up to 1/2″ steel
here is data on tek 3:
so the tek 3 just have a shorter drill head?
tek 3 can’t go thru the real thick metals
what thickness do you want to drill thorugh?
1/4 to 3/8″
then you need a tek 5
Thanks for your help.