You can then secure the tripod to the blocks using lag screws or machine bolts through w washers nuts.
Install antenna tripod on roof.
Apply silicon to roofing screw holes replace the tripod base and put the roof screws back in place by hand.
Whatever you do do not put holes in your roof to attach your antenna.
When the tripod is level firmly press the centered leg platform with the sealing pad to the roof directly over a roof rafter.
Place the tripod on the roof peak.
If you feel you need a stronger mounting you can drill holes through the roof locate them on the underside of the roof and install 2x blocks between the roof joists under the drilled holes.
Insert two 14g 90mm or 100mm hex head roofing screws into the holes.
Tighten the screws until the mast is secure.
You can also buy non penetrating mounts that use weights rather than screws to hold them in place.
How mount an antenna on your roof in order to mount an antenna on your roof without damaging it you should attach the antenna to the gable the fascia or the chimney.
Using some components left over from a former satellite install made converting to an off air antenna rather easy.
Squirt a generous amount down the hole and then cover the area surrounding the hole on the surface of the tile.
Pitch pad seals should be installed under the tripod legs.
Insert a mast pipe into the tripod and tighten pipe support bolts.
You are now ready to hook the antenna to the mast using the u bolts provided with the antenna.
Squirt more silicon over the tops of the screws and smooth with your finger.
Inserting a short pipe will provide a reference for level and make the tripod easier to handle.
Once the tripod is securely fastened to the roof insert the mast into the top of the tripod until it reaches the bottom mast holder bracket.
Be sure not to deform the corrugations of the roof by driving too far.
Unfold the tripod legs and loosen pipe support bolts.