While paint does tend to somewhat glue these pieces together caulking them is never advised and can cause permanent damage.
Caulking prior to staining cedar siding.
Finally you should refrain from caulking the bottoms of horizontal siding sheets or the edges of the tongue and groove panels.
The following outline is intended to prepare you before buying any such products knowing exactly which type fits your final outcome.
7 tips painting or staining cedar wood siding walking into a paint store can be overwhelming trying to decide which paint or stain coating you wish to provide your exterior cedar wood and siding as there are many varieties.
Pressure washing can damage cedar so if possible wash by hand.
Prepare your cedar siding by washing it with soapy water to remove any dirt or dust if any has accumulated.
Think of a wood home as a living thing.
Use a thick brush when staining.
In my opinion caulking between the seams in any lapped siding either horizontal or vertical is not good practice but not just because of any potential vapor barrier effect.
Caulking them is a mistake and the caulking is likely to fail prematurely.
The siding expands and contracts with temperature and humidity.
The non milled wood surface creates a rustic appearance but it can present some challenges when it comes to finishing.
The layering of siding panels acts as a natural waterproofing that will allow precipitation to fall off naturally so caulking would stop the normal movement and function of your panels.
Solid color stains have solid particles but not nearly as many as paint.
Staining cedar with a solid color stain.
What you get is a very uniform opaque color.
Thus solid color stains let some of the cedar s grain show through but none of the color.
Bottom of siding boards should not be caulked water is meant to exit through the bottom of each board.
If you re applying sealant to siding that is already installed it is essential to throughly clean the wood surface being sealed.
After you have washed it wait for it to dry before applying any stain to the cedar.
You have two choices go to sherwin williams or your local paint store and buy cedar colored caulk go for it or stain let dry a couple of days caulk with a clear caulking not silicone your.
Wash part of a wall and allow it to dry thoroughly before applying the sealant.
The upside is that solid color stains will block most damaging ultraviolet light.
Because it tends not to be as absorbent as a more traditional milled siding stains can have trouble penetrating.
How to seal cedar siding.
One of the most thorough methods when staining is to use a thick natural bristle brush.