Caulking for Metal Roof

[karoc]

Guys I was checking out my new metal roof and I see few screws that looks like drunk put them in. Without having to replace metal panel, is there a caulking that can handle direct sunlight and high temperatures? I want to remove those screws and replace them installed straight and put some caulking around damage area. I wish they made screws that had larger washer and that rubber that would cover damage area. Looking for suggestions

 

[Zeke]

I have done this. I bought a sack of rubber washers with a 1/4" ID, but a #10 screw hole would be large enough in most cases. Place a plated steel washer on your sheet metal screw that has the factory rubber washer followed by your bigger rubber washer and insert. Should cover the old hole and then some.

If you caulk, just squirt some around the hole first, you don't need much. The caulk will be protected by the new screw assembly.

 

[kyrbz]

100% silicone caulk withstands temperature extremes and UV degradation. It's typically what should be used for roofing applications.

 

[PCustoms]

Home Depot sells a polyurethane roof sealant in black, I believe it's Henry brand but I'd have to check. Pretty sure it's in clear too...

I've used it for roof rack installations, window sealant etc and even a rubberized screen panel, it works great. Pretty sure sure it comes in clear.

 

[PCustoms]

Home Depot sells a polyurethane roof sealant in black, I believe it's Henry brand but I'd have to check. Pretty sure it's in clear too...

I've used it for roof rack installations, window sealant etc and even a rubberized screen panel, it works great. Pretty sure sure it comes in clear.

I lied, the one I recently used was Loctite PL roof and flashing in black.

 

[alwaysFlOoReD]

SS Fender washers under roofing screws. A dab of caulk under washer.

 

[nadogail]

Back in the 1960’s the roofing screws i used in Spain came with Lead washers. The roofing was made from an asbestos cement composite very similar to Transite.

 

[PCustoms]

Back in the 1960’s the roofing screws i used in Spain came with Lead washers. The roofing was made from an asbestos cement composite very similar to Transite.

Here in 2023 we know a little more about carcinogens

 

[alwaysFlOoReD]

Back in the 1960’s the roofing screws i used in Spain came with Lead washers. The roofing was made from an asbestos cement composite very similar to Transite.

I've removed lead washer nails from corrugated roof panels. I would guess installed in the 60's.

 

[Old Man Roger]

100% silicone caulk withstands temperature extremes and UV degradation. It's typically what should be used for roofing applications.

This.

 

[egdede]

If the screws are solid in the truss, and the line is just crooked, I would consider leaveing it alone.

 

[djbmw]

My vote is for Polyurethane. I have used silicone on metal roofs and it doesnt hold up well in extreme temperature situations as the metal roof expands and contracts (plus 40 C summers and minus 40 C winters). Urethane, on the other hand, has done well.

 

[TnClimber]

Guys I was checking out my new metal roof and I see few screws that looks like drunk put them in. Without having to replace metal panel, is there a caulking that can handle direct sunlight and high temperatures? I want to remove those screws and replace them installed straight and put some caulking around damage area. I wish they made screws that had larger washer and that rubber that would cover damage area. Looking for suggestions

They do make them. Ask your local metal roof guy for rescue/over-size screws. The washer and threads are slightly bigger. They might even give you a handful. I just put in over 2k on my roof. I would get the screws, backout the old one, straighten it up. If it doesn't work, use the rescue/over-size screw. If all else fails, use caulk. Craig

 

[murd]

I picked up a tube of silicon, clear marine grade. Used it for the one I didn't notice my drill clutch was set to destroy. I also ran it down the edge of the sheet at the end of the roof, where it meets the starter strip. Probably being over cautious, but I won't be up there again hopefully.