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How to Replace a Rotted Porch Post

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Remove a rotted porch or patio column, build a new box column and install a new post. The porch post replacements are holding up good so far.
The original old post was a box made of old growth wood. I'm not sure what kind of wood was used around 1952. The posts don't get exposed to a lot of water. I filled the end grains of the wood with some wax so the wood couldn't suck up water. A few coats of polyurethane could be substituted for the wax. The old post sat on concrete. I made bases to put under the bottom of the posts to keep them away from the concrete.
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27 авг 2024

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Комментарии : 72

@Know-How-Now Год назад

It's been about 4 years since the posts have been replaced. They are holding up good so far. I have no regrets yet about how I chose to replace them. Last year I removed all the paint from the box beams with an infrared heater and repainted. The porch looks great. Here are some links to videos that you may find helpful Installing Concrete Anchors ru-vid.com/group/PLvce66kQTjJQhDgQuYllv30VqRXPaZLdx How to Use a Post Jack ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xx3KREs0IoA.html Strip Paint Using Infrared Heater ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3l9kIKr-Z3o.html There are hundreds of videos at Know How Now, subscribe so you can always find the channel…. It’s free. I always respect your time and do my best to keep the videos brief, but informative. Check out the channel with this link: www.youtube.com/@Know-How-Now/videos

@koozjr 5 лет назад

I never knew that some porch columns were essentially hollow “boxes,” instead of solid posts, and that they’re able to support the load of the porch roof. Makes me feel much better about my own project (I was thinking to myself, “oh my god, there’s no post in there, how is this porch not falling down!?”). Thank you for this great video. Straight and to the point!

@Know-How-Now 5 лет назад

Thanks for taking the time to comment. Initially, I thought there may be a metal post in the middle of the "box". I could see the metal anchor when I peeked though the holes on the bottom of the post. I did do some research on the replacement wood. I asked some friends who are in construction about what kind of wood would have been used for the original posts. I got a lot of shrugs. I was told it would be OK to use poplar. My posts don't get wet a lot and I will keep paint on them. I wanted to keep the character of the house and am willing to keep up with the painting. Good luck with your posts.

@susanjacobus4468 Год назад

Very clear and precise instructions! You certainly make it look easy. Based on these instructions, I wouldn't hesitate to tackle a project like this. Thank you for a stellar video!!!

@Know-How-Now Год назад

You are welcome, Susan. It's been a few years since I've replaced the porch posts. They are holding up.

@takeo2u 4 года назад

Very informative! I have a wooden load bearing post that is encased in a cement porch that is dry rotted,. I think this is the way I need to fix it. I appreciate the time you spent on making this video. Thank you very much!!

@Know-How-Now 4 года назад

You are welcome. Best wishes for your project.

@raymondbyczko 4 года назад

Informative and direct! Very good! Good tip to seal the board ends with wax/iron. I also use PVC board to separate wood from wicked moisture.

@jdizzlefoshizzlealldizzle 4 года назад

Outstanding!!! I was going to frame in my front porch and had no idea how I was going to put the posts in. Now I know.

@michaelcorden4099 5 лет назад

Excellent step-by-step video. Everything clear and to the point. Thank you.

@Know-How-Now 5 лет назад

You are welcome, Michael. Thank you for the kind words.

@BobMarshJr 4 года назад

I appreciate the care you took during each step of the project. If you were in my area, I would certainly call on you to do some work for me! Thank you for sharing your video.

@Know-How-Now 4 года назад

You are welcome, Robert. It took some time to replace the posts and I am pleased with the results, you wouldn't want to pay me by the hour. lol. Thank you for taking the time to comment and the compliment.

@montanahutchings3962 3 года назад

Clear and concise! Thanks!

@Know-How-Now 3 года назад

You are welcome!

@biancamontalvo1104 Год назад

Great job!! Thank you so much 😊

@Know-How-Now Год назад

You are welcome, Bianca.

@stlouisinspections 2 года назад

Excellent video. Thank you for sharing your expertise.

@Know-How-Now 2 года назад

You are welcome, Don. Best wishes for your repair.

@ronedwards9133 4 года назад

That was as nice of a job and explanation as I have ever seen!!! Everything I need to know!!! Thk u

@Know-How-Now 4 года назад

You are welcome, Ron. I do my best to make quality videos worth the time spent watching them. If you have a few spare moments, click on the channel name and check them out. Best wishes for the porch post replacement.

@slolerner7349 3 года назад

Wax to seal the end grain! Hadn't seen that before

@camman61 4 года назад

how much load will it carry without a center post?

@MaxQuagliotto 5 лет назад

Oh my goodness this is a great video! I think I found my spring time project!

@Know-How-Now 5 лет назад

Best wishes on replacing the posts, Max.

@anhuynh4856 3 года назад

It seems that the rusted steel anchor bolt was originally installed to prevent a solid 6x6 wood post lateral movement. Also we have to check with local building codes what kind of wood frames can be used to support the roof load.

@Know-How-Now 3 года назад

The posts were original and hollow boxes as shown in the beginning of the video. The post held a block of wood that was mean to prevent the bottom of the post from being knocked out. I've seen the same design on several of the neighbors homes all built by the same builder. No solid posts here.

@JacobKnightRiderShop 5 лет назад

Id put a 4x4 in the center for strength

@Know-How-Now 5 лет назад

Thanks for commenting, KnightRiderShop. I did look up the strength rating for the wood I used for my posts and it is strong enough to support the roof over the porch. Adding the 4x4 is a great idea if the wood you are using will not support the structure and a possible load of snow.

@JacobKnightRiderShop 4 года назад

@@Know-How-Now as long as it holds. My porch pillars are hollow like urs as well but still think it should have a beam inside them.

@Know-How-Now 4 года назад

The original posts held for around 65 years. My house is in a small development that has many houses with the same post design. During the 19 years I live here, I don't know of any of the posts that have caused a porch roof to collapse. By all means, you should calculate the weight of your porch roof, with a snow load if applicable. You can find strength ratings for different types of wood, then you can engineer the correct post design for your unique situation.

@niknoks7638 5 лет назад

Gr8 DIY video.....thank you 👍

@Know-How-Now 5 лет назад

You are welcome, thanks for the compliment.

@ciscotophat 5 лет назад

This is a very well done video! Excellent job!

@Know-How-Now 5 лет назад

You are welcome. Thank you for the compliment.

@ManyThingsSeem 4 года назад

KnightRiderShop is right, use a 4x4 (minimum) and wrap the 4x4 with the 1x

@Know-How-Now 4 года назад

You can certainly add an extra 4x4, but it may not be necessary for every porch roof. I have to beg to differ that it is required in all cases. You need to estimate the weight of the roof, with a snow load, if applicable. You can look up the strength ratings for different types of wood and engineer the design when you have that information. Do you know the weight/load of KnightRiderShops roof and the type of wood he is using?

@RushMayo 2 года назад

Do I HAVE to drill into the concrete when installing the PVC base? Don't want to mess with the structural integrity of the corner of the carport. Also, I plan to use round ventilation inserts in the top and bottom of the column since we live in a high humidity. Maybe a tip for others to use.

@fukrfuck290 4 года назад

Fucking awesome!!! Pleasure to watch -- so clear & concise instructions- Love it!!!

@Know-How-Now 4 года назад

Thanks for the compliment!

@tonym6920 5 лет назад

Great video! You sure are handy! I read that it’s a good idea to ventilate porch columns to prevent them from rotting from the inside out. Have you ever done that? Is that a good idea? They install a vent at the top and bottom of the column.

@Know-How-Now 5 лет назад

I've seen some people saying you should ventilate them. The original columns lasted about 65 years and they did not have any vents other than the triangles at the bottom. The bottoms were rotted, but the rest of the wood was in good shape. I think the bottoms rotted because they were sitting on concrete and sucking up water through the exposed bottom grain. That's why I set them on PVC and sealed the ends with wax.

@tonym6920 5 лет назад

Know How Now My house is only 16 years old and I noticed some soft wood at the base of one of the three columns. They don’t sit directly on the concrete but rest on something that raises it up a bit, the hole in the bottom of the column is not blocked. Anyway, I cleaned it up and used wood filler and repainted but my confidence level is low regarding how long it will last. They’re load-bearing which gives me some worries, lol. I’m having someone come out this week and see what it would cost to replace them. They’re attached to the railing so they will have to do more work to free them up. Boy, if I ain’t one thing, it’s 12 others, lol... Love your channel.

@Know-How-Now 5 лет назад

I briefly looked into aluminum columns. They would dent and I assumed they would have to be custom and cost a fortune. I wanted to keep the character of the house, so I stuck with making the boxes. I did look up the strength rating for poplar wood and estimated the possible weight & snow load on the roof. I agree, there is always something nipping at your heels. I spent around $250 for the materials to replace 2 posts.

@samdeir 4 года назад

Nice video! Got the same issue in my front porch, but why you didn’t use the old post and add just cut it from below and put some new pieces?

@Know-How-Now 4 года назад

The post supports the porch roof, all four sides at the bottom were rotted.

@samdeir 4 года назад

Know How Now same here, this is what I did , instead of replacing the whole porch ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-AsX8pf8SAx0.html

@Know-How-Now 4 года назад

Nice job, Sam. Thanks for posting another way to repair a rotted post.

@kimchee94112 3 года назад

PVC base could be a little larger. Wood glue would add lot more strength than just screws. V notches, not usually done. How was post fixed to the top?

@Know-How-Now 3 года назад

The PVC base couldn't be made larger, slate was put on top of concrete. The post sits on concrete surrounded by slate. You are suggesting that I put a flexible material, PVC on top of the edges of the slate, with a void under the post. The post is load bearing. The original posts had been there since 1952, they were not glued. They did not come apart. I used plenty of screws. The original post had notches, as do all of the originals posts that remain in my neighborhood. The idea is for ventilation to prevent rotting. At around 1:10 I show you that the post was toe nailed in place. Maybe you didn't watch all of the video?

@kimchee94112 3 года назад

@@Know-How-Now Take it easy it was just some suggestions. Sure you could made the base larger or use a different materials like pressure treated of composite wood. If it works for you, no problem. Glue is cheap insurance, that's all. I'll take my advice from Norm Abram and many others throughout the decades with glue and screw. Those notches localized ventilation at the bottom blocked by that plate above, maybe better having air flow all the way to the top of the post. I’ve seen rot at the top as well as anywhere in between. Could provide a mesh preventing nesting from the likes of mice. Strange seeing that base plate mounted high relative to bending moment. But you’re relying on some compression. When a notch comes to a point, that's where the stress is. The wood may not split, but … Wood during 50s are different, fully dimensioned and much tighter grain. If that last another 70 years, good for you. So I missed the toe nail at the top, sorry.

@Know-How-Now 3 года назад

Constructive criticism is welcome and I deserve to rebut your advice, much of which is inappropriate for my situation. You apparently didn't even watch all of the video. How about making and posting a video and show how it's done instead lecturing me?

@YouTubeDave 5 лет назад

I've got exactly the same project to do real soon. I noticed that your old post was repaired/filled/patched more than once before just like mine. Was there any termite damage to the old post? Or just to the block that was inside?

@Know-How-Now 5 лет назад

I was nursing it for a while and patched it several times. No termites, just ants. I'm told by a reliable source that ants are enemies of termites. So if you have ants, you likely don't have termites in the area. Also, if you see carpenter ants hanging around, it's a sign that you have some bad wood in the area. The ants like soft wood. The don't eat it but like it for nests. They destroyed that block and were working on the bottom of the inside of the post. If your post gets wet, you may want to look into something other than poplar. I wanted to keep the character of the house. I think I will be OK. I will keep paint on it, I have it off of the concrete (preventing the water from sucking up into the end grain of the wood) and it only gets a little wet. The post was 68 years old and only the bottom was rotted. I think because it sat on concrete. Good luck on your project. I get a lot of satisfaction looking at the finished project.

@TB-re7eg 4 года назад

Wish you lived near me. I need that same thing done...help!

@Know-How-Now 4 года назад

If you have decent basic carpentry skills it isn't too difficult if you take your time. It took me a while to get this done, way longer than it would have taken may Dad who was a finish carpenter.

@takeo2u 4 года назад

@@Know-How-Now Obviously your Dad was a great teacher because you explained the process perfectly! Nothing like Dads and Daughters!

@oldskoolwayy 3 года назад

She forgot to glue the edge seams so they wouldn't separate and have a gap seam

@Know-How-Now 3 года назад

It's been a couple of years since the posts are installed. The screws are holding the seams together.... no gaps as you suggest.

@oldskoolwayy 3 года назад

@@Know-How-Now that's amazing you have no gaps,,I always hear the pros say glue the seams.

@Know-How-Now 3 года назад

The screws don't allow the boards to pull apart. The original posts were not glued either.

@shawndadisman5784 5 лет назад

Where can I find a pvc board base?

@Know-How-Now 5 лет назад

I had to buy a pvc board and cut off two pieces. It was kind of pricey. The neighbor's porch posts are rotting too and they are going to replace them. I'll donate a couple of pieces of pvc to the neighbors.

@MoPoppins 6 лет назад

I'd heard on woodworking channels that poplar wasn't a good wood for using outdoors, since it's not rot-resistant. Is there any truth to that?

@Know-How-Now 6 лет назад

That's a good question. I asked some friends in the building business what type of wood the original posts might be, and was told poplar was commonly used. I found someone asking your question on a forum and found mixed answers. Some said the old growth poplar was better than the new growth. Other folks said they had no luck with it outdoors and some say it's OK as long as it's not getting wet. It's not sitting on concrete, the bottom grain is sealed with wax and it's painted. Time will tell.

@MoPoppins 6 лет назад

I see...so if rot were to occur, it'd likely be from the water being wicked up from the end grain? I also heard that poplar can be used outdoors, if it's under a covered porch and won't be getting drenched (and as you did, is not directly in contact w/ the ground. I understand it's the most economical wood, and that it paints and stains well, so it's a popular choice when on a budget.

@Know-How-Now 6 лет назад

The old ones rotted from the bottom up. The rest of the wood was in good condition. They were sitting on concrete. I'm sure they were original, the house is about 66 years old.

@MoPoppins 6 лет назад

Your replacement post will probably outlive you, then. That's cool. Thanks for another quick & clear tutorial. :)

@Know-How-Now 6 лет назад

I was aiming to have the replacement last as long as the original and I wanted to keep the character of the house. It was a fun project and satisfying to see the results.