Replace a Porch Column

Knowing how to replace a porch column is easier than you might think. Often times it is more prudent, if not easier, to replace a porch column than it is to fix it.

If you have basic carpentry skills removing a decaying porch column can not only save you money but also make your porch safer.


You must, however, understand what is involved and the precautions you need to take before you begin.

We also cannot stress enough the importance of taking safety precautions and to not undertake such a project if you do not possess the necessary skills. Contacting a reputable contractor is always an option.


installing new porch column on front porch
New front porch column with trim piece being installed
We will describe what is involved in replacing a typical wood porch column. The process is basically the same no matter what type of porch column you choose.


What You Need to Know Before You Begin

turned columns on front porch
Front porch turned columns

Carry the Load

Porch columns are rated to support specific weights, i.e., your roof. When selecting a porch column ensure that it can carry the weight of your roof.

It's a good bet that if you are using the identical columns to those already on your porch, your replacement column should be satisfactory.

If, however, you are changing the columns you may need to consult with a contractor or architect to ensure your columns you choose meet your structural requirements.


Select the Right Column

Ensure the type of column, whether it be wood, vinyl, steel, wrought iron, etc., is suitable for your porch. For example, vinyl porch columns can either be structural or non-structural.


Ventilate If Necessary

Obviously you do not need to ventilate structural vinyl porch columns. However, if using hollow wood columns (which are fairly typical porch columns), you need to ensure air flows throughout the column. Otherwise, they will rot from the inside fairly quickly.












Video: Replace a Porch Column



In this short slide show, Dave explains how he and Dan replaced Dan's porch column.

This is the real deal; Dan needed to do this to prepare his home for sale.




Materials List to Replace a Porch Column

Here are a few items you will need to make the job easier.
  • Hack Saw or Reciprocating Saw (with metal blade): You will need to cut through the nails or screws which are holding the porch railing to the column if applicable.
  • 4x4 Post: Use a 4x4 post cut to length to hold the porch roof in order to both remove the old column and install the new one.
  • Jack: Use the jack to raise and lower the 4x4 and porch roof. Make sure your jack is rated sufficiently to support the roof.
  • Circular Saw: Use to cut the new column to length.
  • Tape Measure: Self-explanatory
  • Top and / or Bottom Trim Pieces (Optional): Used for aesthetic purposes.
  • Bottom Plate (Optional): Protects the bottom of the column from rot.
  • Square and Level: Self-explanatory
  • Pencil: Self-explanatory
  • Screw/Nails: For securing the column and for reinstalling the railings
  • Wood Blocks (Optional): Use some pieces of 2x4s to place under porch balustrades if applicable.
  • Ladder (unless you are really tall): Self-explanatory.


Steps to Replace a Porch Column

Step 1 - Detach the Balustrade (If Applicable)

Separate the porch balustrade (railings) from the porch column. To do so, use a hack saw or reciprocating saw to cut the screws or nails holding the balustrade to column. Take care not to damage the top and bottom rails.


detaching railings from porch column
Detach porch railings (balustrade) and gutter, if applicable
Support the "hanging end" of the balustrade by placing wood blocks underneath. In our case, we had to separate two separate balustrades as we were replacing a corner column.

Now is also the time to detach gutters, etc., from the porch column if applicable.


Step 2 - Prepare the New Column

Measure the distance from the top of the column to the porch floor. Use that measurement to cut (if necessary) the new porch column.


marking new porch column for cutting
Replace a porch column by measuring and marking new column for cutting
Make sure you mimic your existing porch columns in design. You may have to cut from both ends to match the design of the other porch columns.

In our case, we also had to allow for both a bottom column plate and wood plate, so be sure to mimic your existing column.

Now is the time to ensure your porch column is ventilated properly. We drilled holes in both the top and bottom of the column.


porch column with ventilation hole
Ventilated porch column
Use our porch column ventilation guide to ensure you vent columns properly.


Step 3 - Raise the Roof

Measure the distance between the floor and the top of your jack. Add 1 inch for clearance purposes.

Subtract that measurement from the column height measurement you took in Step 1.

Use this new measurement and cut the 4x4 post to length.

Remove any screws/nails that may be securing the porch column either to the roof beam or to the floor.

Position the jack next to the column you are removing. Place the 4x4 on the jack.


positioning jack and 4x4 to raise porch beam
Using jack to lift beam
Slowly raise the jack until the column is free from the roof (or beam). You may hear a little cracking sound which is normal. Do not raise the roof any further than necessary to remove the porch column.

Slide the column out from underneath the roof.


Step 4 - Replace the Porch Column

Add trim pieces at top and bottom of the column if applicable for your project.

Add the bottom plate(s) if applicable.


bottom plates installed on porch column
Bottom plates installed
Slide the new column into place and use the level to ensure it is straight. Also make sure it is aligned properly in comparison to other columns on your porch.


leveling new front porch column
Leveling new porch column
Slowly lower the 4x4 post using the jack and secure with screws or nails.


Step 5 - Attach the Balustrade (If Applicable)

Use the level to assist in attaching the balustrade to the new porch column.


installing porch balustrade on front porch
Installing balustrade on new porch column



Step 6 - Paint/Stain New Porch Column (If Applicable)




In summary: Replacing a porch column is a fairly straight-forward process and although it may be a little different for other types of columns, the process is basically the same.


Did You Find What You Needed?

porch columns collage



We hope you found the column information you were seeking about replacing a porch column. Check out the additional articles about porch columns below.








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