I one a new white log cedar home (3years old) that the contrator place a water proof sealant on at completion of construction. I happen to notice approx 3-4 foot section turning grey. I was told that the entire house should be corn blaster, stained and resealed. Is all of this really necessary? It will cost me an additional $15,000.
It’s hard to say without seeing it, but you might be able to do just the one wall. The problem is that it may not even be close in color to the rest of the house since the finish is 3 years old. If you do not have a stain with a pigment of some sort I would recommend that you do so. It will last a lot longer.