To avoid moisture coming inside, ice & water sheild should be placed under the shingles that will be affected by the screws from the satellite mount.
Also the screws that are used should be caulked properly to ensure a good seal.
The un-sealed screws as pictured will definatley let moisture in, combined with the heat in your attic, mould will form in no time at all!
Donald Serrano, Owner of Roofing-Solutions.ca
<a href=[URL="http://www.fyurl.com/rr.php?c=2&site=www.houserepairtalk.com&url=http://www.roofing-solutions.ca"]http://www.roofing-solutions.ca[/URL] rel="nofollow" target="_blank">Mississauga Roof Repair and Replacement Contractor</a>
ph. (647) 770-4339
email. <a href="mailto:email@example.com">Click Here</a>