Not hoping that the screws might seal.
You're talking about common lag screws with smooth shanks that are threaded only near the tip. These are rated 80,000 PSI. They require predrilling with a 1/4 inch hole, if you are using 5/16" lag screws. Originally, DirecTV specified 5/16" dia x 3 inch lag screws into the rafters or studs. Dish Network went to specify 1/4x3's. If you drive them with an impact driver, they will often break off.
Much better is the #14 (1/4" diameter) x 14 threads per inch three inch long hex head SAE grade 5 ASTM 1018 case hardened sheet metal screw rated at 125,000+ PSI tensil strength. I gaurantee you that this screw, when driven with an impact driver, without predrilling, will MELT the asphalt. These will not break, when power driven.
I have examined inside attic decks for signs for up to five years with no leakage.
As far as installs on vinyl siding goes, the only proper way to mount the foot of the dish correctly is to release the bottom end of the panel, find the studs and to fill the voids behind the siding with a custom cut strip pf plywood. Run the lond screws through the siding, plywood, and into the 2x4. The four corner screws will go into the plywood. This is fine for OSB or plywood sheathing. If the wall has Homasote, foam or cardboard sheathing, the plywood strips need to be long enough to span the stud on which the mounting foot it's fastened and each of the two adjacent studs. These straps should be screwed to the adjacent studs with drywall or deck screws.
You're talking about common lag screws with smooth shanks that are threaded only near the tip. These are rated 80,000 PSI. They require predrilling with a 1/4 inch hole, if you are using 5/16" lag screws. Originally, DirecTV specified 5/16" dia x 3 inch lag screws into the rafters or studs. Dish Network went to specify 1/4x3's. If you drive them with an impact driver, they will often break off.
Much better is the #14 (1/4" diameter) x 14 threads per inch three inch long hex head SAE grade 5 ASTM 1018 case hardened sheet metal screw rated at 125,000+ PSI tensil strength. I gaurantee you that this screw, when driven with an impact driver, without predrilling, will MELT the asphalt. These will not break, when power driven.
I have examined inside attic decks for signs for up to five years with no leakage.
As far as installs on vinyl siding goes, the only proper way to mount the foot of the dish correctly is to release the bottom end of the panel, find the studs and to fill the voids behind the siding with a custom cut strip pf plywood. Run the lond screws through the siding, plywood, and into the 2x4. The four corner screws will go into the plywood. This is fine for OSB or plywood sheathing. If the wall has Homasote, foam or cardboard sheathing, the plywood strips need to be long enough to span the stud on which the mounting foot it's fastened and each of the two adjacent studs. These straps should be screwed to the adjacent studs with drywall or deck screws.
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