This discoloration is most likely caused by a combination of excessive tannins leeching from the wood and mildew growth.
Repaint or restain old shignle siding.
Stained wood siding offers your home a natural or rustic look.
Weather age and normal wear and tear can leave it looking faded or.
Years ago my brother a life long painting contractor had his house resided with beautiful horizontal cedar clapboards.
Cedar shakes are cedar shingles that naturally weather and are resistant to decay.
Any exposed wood is susceptible to the elements that cause mildew swelling splitting and cracking.
Department of agriculture s forest services laboratory recommends cleaning cedar shingles with an oxidizing bleach as opposed to a household bleach to avoid damaging the wood while you can use household bleach to kill mold and algae it tends to make the cedar shingle s surface.
Remember to start on a day when no precipitation is predicted over the next several days if possible.
Painting cedar however calls for some preparation.
The brown shingles on our house built in the late 1950s are showing signs of wear.
He used a national brand transparent oil stain.
While not worn or damaged the shingles look tired waterlogged or parched depending on the season.
The most damaging element to cedar siding is moisture.
If new shingle siding no need to strip or try removing old paint not that you could do this 100 anyway priming painting is one of a solid type coating apt to blister bubble chip or peel.
Some sections of old unpainted shingles and siding may look darker than others.
Restain old wood siding to give a house a fresh new appearance.
Even unpainted cedar will last for years.
Semi transparent stains would never do this protecting much longer.
Cedar shake siding isn t hard to maintain if you are well planned.
Trying to keep ahead of the greying of the wood several repeat applications of stain were applied over the years until it had the appearance of solid hide stain.
Like most wooden shingles however especially when painted they require care and maintenance over the course of time.
Cedar siding is very durable against the elements but still requires regular maintenance and depending on the climate should be restained every few years.
Cedar siding though durable and able to maintain a good finish for a long period of time does sometimes get damaged and it is certainly not completely immune to rot no matter how well it has been treated and maintained.
Cedar shingles can also grow moss and algae or develop iron staining which requires periodic cleaning.