
- Get sawdust that matches the type and color of your wood. ...
- Squeeze wood glue into the crack. Get a bottle of wood glue from the store. ...
- Cover the glue with sawdust. Layer a lot of sawdust over the glue to completely cover it. ...
- Let the glue dry overnight. Leave the glue to rest until the next day. When the glue is completely dried, the crack should be hard to see.
- Sand the crack smooth. Go over the crack with a piece of fine grit sandpaper that's between 120 and 220 grit.
- Mix Powdered Glue with Water. ...
- Paint Splits Liberally with Glue. ...
- Apply Clamps to Post. ...
- Fill Gaps with Scrap Wood. ...
- Remove Clamps and Excess Glue. ...
- Wrap a Chain Around Post. ...
- Wrap with Galvanized Sheet Metal. ...
- Secure with Roofing Nails.
Why are my deck posts cracking?
Well, cracks occur on deck posts as the wood shrinks. Here, dried out woods mainly contribute to wood shrinking. As a result, cracks take place on deck posts. But are there other reasons that contribute to the cracking of woods? Well yes, there are other reasons too.
How do you fix a broken post on a fence?
Fix them with the same glue used on waterproof plywood. It bonds the post while filling the crack. Alternatively, install a metal brace to secure the post. Mix the powdered resin glue with water according to manufacturer's directions printed on the package.
How do you fix cracks in wood before painting?
Scrape and brush with a stiff brush to remove loose paint and dirt. Assuming these are just surficial cracks, and not deep structural cracks, you should prime any bare wood first, then patch the cracks with any decent, exterior grade wood filler or patching compound (then prime the patches before final paint).
How to fix a cracked wood table top?
By doing this, the fibers of wood will mix and fill the crack strongly. Remember to keep the glue and water as it is and let it dry for 24 hours. Lastly, scrape any residue from the cracked area. Lastly, use a chisel to take off any part that’s not needed. And gently stroked with sandpaper to smoothen up the area.

How do you fill cracks in a wooden fence post?
If the cracks are small, you can fill them with epoxy or another wood filler. For larger cracks, coat the sides of the crack with waterproof glue, then wedge in wood scraps to fill the cracks. This is a temporary fix, but will help until you replace individual boards or the whole fence.
How do you fix a cracked 4x4 post?
2:264:30How To Treat 4x4 Posts To Last A Long Time - 4x4 Fence Post CracksYouTubeStart of suggested clipEnd of suggested clipWell. I just use any latex caulking and the reason why I fill up all them cracks is I've noticedMoreWell. I just use any latex caulking and the reason why I fill up all them cracks is I've noticed myself compared to not doing it to a post.
Is it normal for wood post to crack?
Cracking and checking is a normal part of timber frame buildings, fences, and furniture and is very rarely a result of any structural issues. Cracking and checking of timber is actually a very natural part of the life cycle of wood – even once it's been cut, shaped, and prepared for building.
Should I fill cracks in deck posts?
Cracks continue to move with the weather, so these areas of damage and any timber joints in the deck that have opened up should be filled to avoid additional moisture problems and insect infestation. If old posts are cracked, check for rot before filling or replace posts if they are not structurally sound.
How do you fill cracks in outdoor wood?
Wood putty or wood filler sticks are easy to use and effective for covering over wide cracks in indoor and unstained wood. For a quick fix, a mixture of wood glue and sawdust seamlessly blends in small cracks and gaps in assembled furniture. Purchase epoxy to handle larger gaps, such as on outdoor projects.
How do I stop my wood post from splitting?
If your posts are cracking, it's likely because they are brittle and dry. Apply some type of wood stain or sealer containing natural wood oil to bring back a supple quality to the wood to prevent further problems.
Why do wooden posts split?
The timber starts to exhibit cracks and splits where it further dries out from it's original point of FSP. It is, by its nature trying to reach an equilibrium with it's surrounding air moisture.
How do you fix a cracked porch post?
5:277:27How to Repair a Rotted Porch Post | Ask This Old House - YouTubeYouTubeStart of suggested clipEnd of suggested clipWhen it's dry we'll sand it and spray all the bare spots with primer. Especially the end grain. ThenMoreWhen it's dry we'll sand it and spray all the bare spots with primer. Especially the end grain. Then we'll just reattach the base plate to the bottom of the post.
How do I stop my 4x4 from splitting?
1:418:30Prevent Your Boards From Splitting- STOP Cracks in Their Tracks!YouTubeStart of suggested clipEnd of suggested clipThat well you can use paint wax or a product called anchor seal from wood craft. And essentiallyMoreThat well you can use paint wax or a product called anchor seal from wood craft. And essentially what you're doing is you're painting the end grain trying to seal those pores.
How do you stop a fence post from splitting?
0:051:53OWT Post Bands & Accessories - OZCO - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd add one piece at a time holding. It in place hand tightening the bolts. You will then tighten orMoreAnd add one piece at a time holding. It in place hand tightening the bolts. You will then tighten or snug the bolts with your wrench or socket. Two or three more turns. No need to over tighten.
How do you fix a broken post?
1:527:34How to Fix a Broken Fence Post in Under 30 Minutes - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd I'll take something to kind of scrape in there. So I find the hole in the concrete where theMoreAnd I'll take something to kind of scrape in there. So I find the hole in the concrete where the post sits. So now you can see that what we're gonna do install this easy mender right there.
Does pressure treated lumber crack?
After being outdoors for six to 12 months, treated lumber will develop cracks, called "checks," along the surface of each board. These hairline cracks are a normal part of the drying process.
How to repair a cracked wood floor?
Step 1: Apply Fillers in Woods. To start proceedings, take your putty knife to level the damaged area. However, you can also use a spatula as an alternative to a putty knife. After this, take the knife to apply the filler into the cracked area.
How to cut cracks in wood?
Make sure to take the measurement a bit longer than the cracked areas. After you’re done, take a band saw and start cutting the slices of wood from the measurement. Here, wear gloves and cut by imitating the shape of cracks.
Why is it important to locate where the cracks are taking place?
This is because the cracks can spread throughout the wooden post. And, this will contribute to more damage.
What happens if you don't have a support post on a deck?
If you have an elevated deck post, make sure they’re supported by vertical posts. If they don’t have any support on them then they could easily form cracks or splits. Also, water in the base of the post can cause serious damage to the wood fibers. This will cause the wood fibers to become soft.
Why are my wood posts not stable?
By now, you’ll already know that certain moisture content is necessary for the woods to be stable. But, weather can affect the decrease in moisture of the wood cells . As a result, it causes the wooden posts to not be stable enough and cracks to take place. On the other hand, the wood moves always.
How to remove excess timber filler?
However, you’ll need to remove the excess timber or sand from the area. So, take the sandpaper or grit paper and stroke through the surface. This will remove the excess filler and sand from the surface.
Why does wood dry out?
So, you can consider it to be a natural cause. But, it’s not always natural. This is because if a block of wood becomes wet and later dries in the sun and this isn’t good for the wood cells.
How to fix splits in a post?
Dip a paintbrush into the syrupy glue. Use the end of the brush to force glue inside the spits from the top down. If the split is flexible, pry it open with a screwdriver or pry bar. Paint the split thoroughly with the brush, saturating the splits until the glue runs out of the split liberally. Do all four sides of post if the splits run through to the other side or there are additional splits.
Why are my fence posts cracking?
Wooden Fences; George Nash. Tips. If your posts are cracking, it's likely because they are brittle and dry. Apply some type of wood stain or sealer containing natural wood oil to bring back a supple quality to the wood to prevent further problems.
What wood is used for split posts?
Repairing Split Wooden Posts. Wood species such as cedar and redwood are typically used for wooden posts. Other types of posts include pressure-treated spruce or pine. Posts like these resist rot, insects and decay and can remain in the ground for years without noticeable degradation. No matter what the post is made from, however, ...
Can a post be cracked?
No matter what the post is made from, however, it's not imper vious to splits and cracks. Problems occur when the post becomes dried out and brittle. If the split is not stopped, it gets worse. Fix them with the same glue used on waterproof plywood. It bonds the post while filling the crack.
Is ACQ treated lumber waterborne?
It is prone to twisting, cracking, and checking. To make matters worse, the ACQ treatment is waterborne. They jam a considerable amount of water into the wood during the treatment process...Hence the weight of treated lumber.
Does kiln drying cause warping?
The process of kiln drying doesn't cause treated lumber to warp. It actually is a controlled removal of the moisture as opposed to installing it wet and letting mother nature do it. This isn't a Home Depot problem. It is a lumber-in-general problem.

Why Do Cracks Take Place in Deck Posts?
The Fixes
- By now, you’ll already know about the reasons that contribute to the cracks forming of the woods. But wait, let me tell you something. Just because the cracks have formed in the woods, doesn’t mean you can’t fix them. If you can follow the simple fixes correctly, you can easily get rid of this problem. So, without further ado, let’s look at what you should do to tac…
Frequently Asked Questions
- Is it normal for the wood to split?
Splits in wood can occur normally due to excess loads in the woods. - Will linseed Oil stop wood from cracking?
You can take linseed oil to give protection from wood cracking.
Wrapping Up
- That’s all we have for you. By reading this article, you’ll know what to do when cracks in deck postshappen. Moreover, we’ve even discussed the reasons for cracks formation in this article. Lastly, we’d like to tell you that wood checking preventioncan reduce this problem. In the end, it’s the maintenance of the deck posts that’ll keep them away from cracking. A…