To protect your home from direct lightning damage, All you need to do is properly GROUND your tripod with a fairly heavy sized conductor, With no sharp bends to a good ground system.
(#6 is considered a minimum size wire, Flat copper or aluminum strap several inches wide is much better, Hollow copper tube can also work well.)
(To properly protect all your equipment connected to the antenna is a little more complicated.)
For some good info:http://members.cox.net/pc-usa/station/ground0.htm
(Lightning DOES strike ungrounded TV antennas on tripods and cause damage to a home. A local home near here had a strike that missed a childs crib by only a few feet as the energy from the tripod strike went to ground THROUGH the house!
Having a properly grounded tripod on the roof (Or tower next to the house) Makes you much safer than not having the grounded system.)
(Taller trees in the area is NO insurance of not being struck)