Antenna Mount Question

[northwoodsradio]

Hello, so I'm planning on adding up an antenna at my cabin, and I have a mount that has three tri-pod legs that come down for support of the 5 foot long main mast. I'm looking at installing it into my roof through the shingles. Question is what is the best way to drill into the roof that won't have an effect and the best screws for doing this too?

Thanks for the feedback!!

 

[jack103]

1/4" or 5/16s" lag screws use a good silicone sealer on the bolts while installing then . Maybe the tripod has installation instructions with it.
Make sure you use galvanized or stainless screws .

 

[Project25_MASTR]

Lag bolts…

 

[KZ9G]

The best way I have seen is setting up the tripod on the roof and drilling down holes that are the size of the holes in the tripod. After that go in the attic and mount 2x4's across where you drilled the holes and screw them into the rafters. Then re-drill the holes again but this time run it throught the 2x4 that you just mounted. Then get bolts long enough to stick through the tripod, roof and 2x4. Pick up the tripod and put roof tar (they sell some in caulking tubes) under where the tripod legs contact the roof. Then push the bolts through and put fender washers inside to spread out the load a bit on the reinforcment blocks. Once tight liberaly put roofing tar over the bolts and around and over the metal that contacts the roof. Lag bolts can pull out over time and I have repaired more than one that no one put tar under where the water worked under the tripod and down the bolt and rotted out the wood. You more than likley have an aspalt shigle roof and tar would be a much better choice than silicone.

 

[prcguy]

I agree as most roofs only have 1X6s with large spacing in between where you can miss them altogether with lags or the roof is 3/8" plywood which will not hold a lag bolt very long.

Besides using 2X4s inside the attic and through bolts I like to put a big blob of silicone over the bolt hole so the bolt pulls some through and seals the bolt hole. Then a layer of roofing tar over the entire tripod foot, then a layer of fiberglass screen mesh to keep the tar from cracking over time, then another layer of tar. I've never had a leak in 40 years doing this.
prcguy

The best way I have seen is setting up the tripod on the roof and drilling down holes that are the size of the holes in the tripod. After that go in the attic and mount 2x4's across where you drilled the holes and screw them into the rafters. Then re-drill the holes again but this time run it throught the 2x4 that you just mounted. Then get bolts long enough to stick through the tripod, roof and 2x4. Pick up the tripod and put roof tar (they sell some in caulking tubes) under where the tripod legs contact the roof. Then push the bolts through and put fender washers inside to spread out the load a bit on the reinforcment blocks. Once tight liberaly put roofing tar over the bolts and around and over the metal that contacts the roof. Lag bolts can pull out over time and I have repaired more than one that no one put tar under where the water worked under the tripod and down the bolt and rotted out the wood. You more than likley have an aspalt shigle roof and tar would be a much better choice than silicone.

 

[shortride]

Don't forget to run a ground wire.