Unfortunately, when enclosing a lanai many re-modelers set the exterior door directly on the slab with no recess. There is only a small bead of caulk, which is preventing water from rolling directly into the room. In time, caulk shrinks, the door settles, and water will leak under the door. For this type of installation to be successful, the homeowner must be diligent in keeping the door completely caulked, but few do. Throw in little to no roof overhang and you have a lanai that constantly has water coming in underneath the threshold.

Water will find a way into your home, and only through good initial building decisions and maintenance can you mitigate its effect. The quality of the installation matters just as much as the product itself when it comes to water intrusion. One myth that is true when it comes to water intrusion: water will always find the weakest point to enter your home.

Don Magruder is the CEO of RoMac Building Supply. He is also the host of the Around the House TV show on LSTV and LakeSumterTV.com at 1 and 6:30 p.m. Monday, Wednesday and Friday; at 9 a.m. and 4 p.m. Tuesday and Thursday; and at 7 a.m., Noon and 6 p.m. Saturday.