Repairing Rotted 4x4 Deck Posts - Building & Construction - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction


Thread Tools Display Modes
Old 03-12-2011, 07:03 PM   #1
Join Date: Mar 2011
Posts: 1
Rewards Points: 10

Repairing rotted 4x4 deck posts

My deck 4x4 posts are (25 yrs. old) approx. 10 feet in heigth. They have begun to rot at the top. Do I have to dig up and replace the whole posts or would it be OK to cut the posts off just below floor board level and top this with a new section of 4x4?
If I add a new section do you think the seam will hold up against weather and rot? In the future if we decide to sell our home do you think this would pass a homebuyer's inspection?


j.e.b. is offline   Reply With Quote
Old 03-12-2011, 07:57 PM   #2
Residential Designer
AndyGump's Avatar
Join Date: Sep 2010
Location: Orange County CA.
Posts: 1,353
Rewards Points: 622
Send a message via Skype™ to AndyGump

Repairing rotted 4x4 deck posts

In my opinion the answer to all three questions is a resounding NO!

Dig them up and replace.



AndyGump is offline   Reply With Quote
Old 03-12-2011, 08:05 PM   #3
In a little over my head
Join Date: Jan 2011
Location: Atlanta, GA
Posts: 835
Rewards Points: 700

Repairing rotted 4x4 deck posts

I'm no engineer, but I'm pretty sure that replacing the top of the posts won't fly. Sistering a new post the full height may be strong enough, but I doubt it would pass any type of inspection. Maybe replace the top like you suggested, then sister a 2x4 to both sides of it, with plenty of through bolts. But I doubt that would pass an inspection, either. If it's rotted at the top, it's probably rotted near the ground, too.

When I built my deck, I poured footings in those cardboard tubes, the used steel ties between the footings and the posts. The posts run from the steel tie to the bottom of the rim joist (band). You could do that, next to the existing posts, then dig out the old ones. The only challenge would be the corners.
ratherbefishing is offline   Reply With Quote
Old 03-13-2011, 08:33 AM   #4
Join Date: Jun 2009
Location: atl & hilton head
Posts: 4,162
Rewards Points: 3,906

Repairing rotted 4x4 deck posts

yes, of course you could,,, BUT, since you have to support the deck while you making that repair, why not do it right ? put in conc bases to support the weight & install new supports,,, it will be done right & you won't give the home inspectore laughing fits

ps - if there's ever a problem w/collapse & someone sues, your insurance co will have the last laugh
stadry is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Double Level Deck 6x6 posts Skytree Building & Construction 3 09-07-2009 11:47 AM
Guidance needed for deck support posts Mike Loyd Building & Construction 4 08-23-2009 08:03 PM
Deck Posts replacement with load bearing columns from Pacific Columns, Inc Bruce Wilson Building & Construction 7 05-24-2009 03:55 PM
need help on repairing rotted deck support ga1990 Building & Construction 6 11-07-2008 08:32 PM
Q:Temp support to replace beam and posts on deck dougq Building & Construction 10 09-02-2008 05:24 PM

Top of Page | View New Posts