The wood itself is only 2 years old but failure to seal the end cuts has allowed water to penetrate into the wood which has rotted.
Treating cut ends of pressure treated wood.
When cutting thick pieces of wood such as fence posts the preservative may not have soaked all the way to the center of the lumber.
Outlast q8 log oil is the best choice for this purpose because it contains 675 copper 8 quinolinolate to meet the awpa m 4 standard for end cuts bore holes and fastener punctures and it is virtually odorless while drying invisibly into the end grain.
It is used for many exterior applications such as decks and picnic tables.
All residential treated wood since the elimination of cca as the pressure treatment chemical needs to have an end cut booster treatment.
The 3 12 pressure treated wood stair stringers in the picture above left of image have decayed causing structural issues with this staircase.
This causes it to be resistant to decay and insects.
Provides a water repellent finish on pressure treated timber which has been cut or drilled in any way to expose the untreated inner wood.
Contains resins and oils to give a long lasting effect.
Pressure treated wood is wood that has a preservative forced deeply into it.
Example of treated wood failure due to not treating end cuts.
Protects against fungal decay such as wet rot wood discolouring fungus and wood boring insect attack.