There are many reasons for rotten home siding and trim boards in the Houston climate. We find more rot on newer homes than older homes. The reason usually is due to the initial paint job. Builders skimp on preperation which includes low grade caulking, paint, siding and trim products. Houses are built so quickly these days that the wood used is usually still wet, then it cures / shrinks after it was installed on the home. This movement allows areas to open up and trap water that then begins the rotting process. On older homes caulking dries up and cracks allowing water penetration behind the trim and siding.
Rotten T 111 siding, houston
The Houston home above is not as bad as it looks. This was the sun exposed side of the house. We replaced the existing wood panel siding with Hardie Cedarmill panel siding. Then we replace various trim and fascia boards around the home, caulked and painted with Sherwin Williams Super paint. The end result was we were able to salvage over 75% of the existing siding and trim without cutting corners. Great savings and a fresh start.