Let me provide you with some.
Causes warped wood siding.
The reason siding becomes warped is because the ends of the wood boards were placed too close to each other when they were installed.
Sometimes the actions of a homeowner can be the problem.
Sometimes holes in the wood siding are the reason for the siding being warped.
They range from woodpeckers searching for a meal to bugs and carpenter bees looking for refuge and sustenance.
The ones exposed to more air and heat near the outsides of the pile had dried in unexpected ways.
First clean out the holes carefully.
Wood siding is particularly vulnerable to pests.
Water damage can cause warped siding water exposure is a major issue with wood siding which is why so many homeowners prefer vinyl siding over wood siding.
Wood can only withstand so much of a beating from a combination of sun wind rain and snow before it starts to fall apart.
Additional causes for warped siding include structural issues such as missing studs improper nail placement or using the wrong nails during installation.
You might be able to repair some minor warping with nails and screws but this does not really address the problem.
Poor drainage can also cause problems and even sprinklers that constantly hit the side of a house can cause wood to become warped.
Not all siding buckling and warping is from poor installation.
Moisture causes wood to expand.
When was the last time you had the house cleaned stained.
If the siding was pushed upwards too tightly clamping very tight on the connecting lip of each siding segment below it might have encouraged stretching then warping and loosening due to subsequent heating.
While less common termite or pest issues can also be the cause of warped siding if they begin to eat away at the structure of the house.
When the ends of the boards expand against each other they warp.
In 2008 new darker colors were introduced to the vinyl world and now two to three years laters these dark siding colors are buckling and warping due to heat attraction that they draw from direct sunlight.
The basic answer is that wood warps because of uneven drying rates within the wood fibers.
Some debris may have gathered in the holes.
As my boards had sat there throughout the summer.
Vinyl meanwhile is far more durable.
If this is the case you can use stainable wood putty to fix these holes.
Using a bristle brush you should thoroughly clean out the hole.
Termites will tunnel their way through wood as will powder post beetles severely limiting the protection your siding will offer.