Lanaii Drainage
 

Need to find somebody who installs a drainage system for lanaii floors.

What I used
 

PestGuard WaterGate? Lanai Drain :thumbup:

Can also do it yourself if slightly handy
 

If your problem is that after a rain, water collects at the aluminum channel anywhere along the edge of the lanai, here's a quick do-it-yourself method.
Find the deepest area of water and simply loosen 2 or 3 of the closest screws holding the channel down at the concrete. Slide something that won't rust (a coin or something about that thickness) beneath the channel (both sides) and snug it back down but don't make it tight. Water will run right beneath and still keeps the critters out.

Works like a charm and takes less than 5 minutes and is free.