Generally, if your pressure-treated 4×4 wooden posts are set in concrete or have a stone base, you can have them in good shape for up to 25 years. However, if the post underground is in constant contact with water and moist ground, it might not last more than seven years.
What should I put between wood and concrete?
Anyplace where wood meets the ground or concrete, the lumber must be pressure treated. For additional moisture protection, a gasket or strip of closed-cell foam can be installed between the concrete foundation and the sill plate.
Can wood be set in concrete?
With concrete holding the moisture against the wood, wood has no chance and will eventually lose the battle. Now you don’t have to lose all hope because it’s for certain that the concrete around the post will crack, therefore making it easy to pull out when it starts to rot. Even worse, the concrete cracks early.
Will pressure treated wood rot in concrete?
Simply setting the posts in concrete does create a condition that will accelerate rot in the bottom of the posts. With pressure-treated posts, the rot will be slow.
Can pressure treated wood be in contact with concrete?
Wood in direct contact with concrete, and the dampness often found there, will rapidly decay. To avoid this, use pressure-treated lumber. This is wood impregnated with decay-resisting chemicals, usually chromated copper arsenates.
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How long does a pressure treated post last in concrete?
A PT post will last a long time in concrete, maybe 5 to 10 years in soil alone. I suggest you embed the post in concrete, trowel a peak around the post so water runs off, and don’t let the PT post come in contact with the ground.
How do you keep wood from rotting in concrete?
Consider Adding Posts to Concrete
From here, you should fill the hole with about 6 inches of gravel. This will prevent rotting by ensuring that the post is kept dry when water makes its way into the soil. Place the post in the gravel, then fill it with a batch of cement until it reaches the top of the hole.
Can you pour concrete against wood?
Quote from the video:
Quote from Youtube video: The concrete up against the wood there's a good chance you're going to end up with some dry rot and wood damage to the siding. And of course to the floor framing.
How long will a pressure-treated post last in the ground?
A treated 4×4 will last 20 to 25 years in the ground if the conditions in the soil and climate are favorable. That number could increase to 40 to 75 years if you install the treated 4×4 in a cement ring rather than the soil.
Do you need moisture barrier between wood and concrete?
A common question that DIYers ask is, “I’m installing a new floor on-grade, a cement slab. Do I need a vapor barrier for hardwood floors?” The answer is YES! Moisture can destroy hardwood flooring. It causes cupping, warping, and even mildew if not treated.
Why deck posts should not be set in concrete?
Deck Posts Will Rot When Set in Concrete
The concrete around the post is acting as a bowl holding water. Just like a concrete swimming pool holds water, so does concrete around a deck post. The rain falls and collects on top of the concrete with no place to go except into the post.
How do you protect pressure treated wood underground?
Quote from the video:
Quote from Youtube video: So you cut one in half right. You cut it in half that core is exposed and the core so dense it's hard for that pressure treating to get in there. So what you do is is you brush this stuff on here and
Can you put pressure treated wood directly on the ground?
Pressure-treated wood is softwood lumber, typically southern yellow pine, that’s been chemically treated to resist rot, decay and termites. Lumber treated to “Ground Contact” has a high chemical retention level and can be placed directly on or in the ground with better protection against rot or decay.
Can pressure treated wood be used below grade?
Ground-contact pressure-treated lumber can be used either above ground or in contact with the ground. Has twice the level of chemical retention and protection compared to above-ground treated wood. Must be used when lumber is less than 6 inches from the ground or has poor ventilation.
What should I put between 2×4 and concrete?
Quote from the video:
Quote from Youtube video: Makes a tape called wig love and this is a particularly good choice wherever we're sticking to concrete.
What is the best treated lumber for ground contact?
UC4B lumber is suitable for ground contact and contact with freshwater. It is also durable enough to be used for “critical construction” projects, such as utility poles.
What’s the difference between green treated and pressure treated wood?
Green timber has a naturally-pale, wooden colour but you will also note a slight green tint or fleck caused by the pressure-treating process. The chemicals used in pressure treatment are copper based which react with both the sap of the timber and the air and then oxidise, creating green flecks on the surface.
What is the difference between green and brown pressure treated wood?
Brown timber is a traditional dark brown coloured wood, which follows the same pressure treated process as green timber to extend the timbers life but the only difference is to achieve the brown colour, a brown dye is added to the copper preservative mix.
