Foot mount screws and leakage protection

[sg2100]

This may be a dumb question but what size wood screw is best to use for any standard bev dish or elliptical , I am gonna mount my dish on the roof , and wondered what they are using under the foot , looks like something to prevent leakage into the attic its a red material , and or whats best for preventing any possible chance of water seaping down the threads of the screw ?.. thanks

[sg2100]

Try to hit a roof joist with at least 2 of the screws.When I did it,I used 5/16 lag screws long enough to get through the roofing material and at least 1 1/2" into the joist with 2 screws, and 2 shorter ones for the non-joist part of the mount.Long ones +2 1/2 "...short ones 1 1/2".I didn't use any sealant on them.Keep in mind,roof mount isn't ideal for many reasons.

I dont really want to roof mount it , but the location where it currently is needs to be changed its only 7 ft mounted above ground on a post , I am trying to achieve elliptical with 5 lnb bracket setup and there are many trees blocking a couple of sats , but if moved to roof i should have clearance , I appreciate your help .

[jvvh5897]

You can always hit the screws with a little caulking compound or silicon just before you tighten them the last 1/4 inch or so. A little creative thought might find you a way to get dish to roof hight but not have to do roof instalation--a support board just below eaves maybe.

[Terryl]

You can also use a roof gable mount, and a 1 1/2" piece of EMT conduit, this will get you above the roof and you dont have to put screws through the roof.

One like this.......
http://redmancb.com/redman-cb-roof-eave-antenna-mount-gable-bracket-tv-satellite-dish-cb-ham-radio/

[satchick]

There is a product specifically for this application called Sureseal, it's a butyl rubber product that gets sandwiched between the mounting foot and roof. When you torque the bolts, the rubber forms a tight seal. You should also use lag bolts, at least 2" and try to get at least two into a joist. Using roofing tar around the bolt heads is also a good idea.

If line of sight permits, mount near the edge of the roof, over the soffit, or just mount to the fascia instead of mounting over occupied space.


http://sadoun.com/Sat/Order/Install/Screws.htm

There is also another mount called "Commdeck" that looks interesting. Little pricey at close to $80 but it looks like it'll make for a very clean installation.


http://www.amazon.com/Commdeck-Satellite-Dish-Mounting-System/dp/B000AA9ERU