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Pressure treated deck

Posted on 6/13/24 at 2:17 pm
Posted by Sparty3131
Baton Rouge
Member since Feb 2019
885 posts
Posted on 6/13/24 at 2:17 pm
Considering building a deck on piers and placing a metal carport over top and closing in the walls.

This to save money on pouring a slab. How long can I expect it to last? Raised and covered. Pressure treated pine.
Posted by TheDrunkenTigah
Baton Rouge
Member since Aug 2011
18151 posts
Posted on 6/13/24 at 2:22 pm to
Will depend almost entirely on how high it’s elevated off the ground. If it’s high enough that it can stay dry, it could outlast you, but if it’s within 8-10” of the ground it will rot within about 10 years. Think crawlspace height, higher the better.
Posted by Sparty3131
Baton Rouge
Member since Feb 2019
885 posts
Posted on 6/13/24 at 2:38 pm to
South Louisiana
Posted by MoarKilometers
Member since Apr 2015
20614 posts
Posted on 6/14/24 at 3:36 pm to
Since it's not a living space, would recommend cca treaded wood, if you're insistent on doing it this way.
Posted by Finch
Member since Jun 2015
3703 posts
Posted on 6/14/24 at 4:43 pm to
We replaced all of our decking and balcony with the composite boards and couldn’t be happier.

The upfront cost is a bit more but it looks way better and will last so much longer
Posted by TDsngumbo
Member since Oct 2011
49202 posts
Posted on 6/14/24 at 4:44 pm to
When I bought my house there was a large wooden deck built only about 5" above the ground in my back yard. I pressure washed it initially to get it looking better but in reality, you can only put so much lipstick on a pig. It was rotten in many spots so eventually I demoed it. While I was tearing it down, rats and roaches scattered everywhere. They were living under it because of the dark, damp environment which was created by such a low to the ground deck. I'm going to eventually rebuild it but when I do, it'll be higher for sure. I'm thinking a foot above the ground to allow for airflow.
Posted by bonstonker
Member since Jan 2008
361 posts
Posted on 6/14/24 at 5:57 pm to
Same here

Just demolished my 400sqft deck.
Got tired of replacing boards.
Found one the supports split causing the low spot.
Apparently they had a spa on it.

Installing catch basins and pipe tomorrow then seeding bermuda

This post was edited on 6/14/24 at 5:58 pm
Posted by TygerDurden
Member since Sep 2009
1939 posts
Posted on 6/16/24 at 8:51 am to
If you just have to have a pressure treated deck then do some research on pressure treated lumber and find a location that sells the lumber that has the highest level of “rot” prevention treatment available. Probably will not find this a box store like Home Depot. Normally you will have to go to a specialty lumber dealer. It’s not cheap but it will last longer. You may find out putting in concrete will be cheaper. I built a large wooden deck 10 years ago with “Home Depot” pressure treated lumber. I had to demo half of that deck this year. And it had a high grade stain / weather protectant applied on it. Now I don’t have a roof over mine so it was exposed to a lot of rain over that 10 years. Long story short …never again will I build a wooden deck. It was a massive waste of my time and my money.


As for time and cost advice …take how long you think it will take you to build it and how much it will cost and double that for figure. Maybe tripe the hours you think it will take to build especially if you are doing it by yourself. Lots of good YouTube channels on the best way to build one should you want go attempt yourself.

Good luck on your project.
Posted by sosaysmorvant
River Parishes, LA
Member since Feb 2008
1466 posts
Posted on 6/17/24 at 5:57 am to
Spend the extra money on concrete if you plan to stay in this house. Treated deck boards today are not your dad's treated deck boards. I have a large raised deck that had treated lumber installed on it in the 90's. Never had to change a board, but the surface got eaten up by the sun and elements, so I decided to redo the entire deck with new "treated" lumber. Worst mistake of my life. These boards rot at an astronomical rate. They banned some wood preservative/anti rot agents in the mid 1990's. Boards are shite now.

If you are dead set on saving the money with decking, buy a tub of "tim-bor" wood preservative. Treat both sides of the decking with that stuff prior to installation and you might get some time before the rot sets in.
Posted by NATidefan
Two hours North of Birmingham
Member since Dec 2008
36776 posts
Posted on 6/17/24 at 7:37 am to
People seem to be ignoring that you are going to have this raised and covered.


If it doesn't get wet, it should last a really long time. Especially if you stain it once a year or so. Make sure you pour concrete footers and use a post base to lift the support beam off the ground.

This post was edited on 6/17/24 at 7:38 am
Posted by Jmcc64
alabama
Member since Apr 2021
1840 posts
Posted on 6/17/24 at 5:02 pm to
Sosays, they did away with the arsenic in the preservative for "safety" reasons.
Posted by Jack Daniel
Gold member
Member since Feb 2013
28742 posts
Posted on 6/17/24 at 7:25 pm to
quote:

How long can I expect it to last? Raised and covered. Pressure treated pine.

Longer than a fence built with non-treated wood
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