Porch Railing Replacement — Rotted Front Porch Rails and Spindles
The bottom rail on the front porch is soft, the spindles wobble in their holes, and the whole rail moves when somebody leans on it. We replace the rail and spindles and anchor the posts so it is solid again.
Porch railing replacement is a rebuild of the guard around a front or side porch: the top and bottom rails, the spindles between them, and the posts they attach to. JMB Builders pulls the rotted rail, re-anchors the posts to the porch framing, and installs new rail sections in PVC, composite, cedar or aluminum with spindles spaced to code. Across the Twin Cities metro, priced per project by the run of rail, quoted from your photos within one business day.
- Priced per project, by the run of rail
- PVC, composite, cedar or aluminum rail systems
- Posts anchored to the porch framing
- Quote from photos in 1 business day
- Licensed MN contractor BC809005
A porch railing fails from the bottom rail up. The bottom rail is flat, the spindles sit in it or on it, and every spindle joint is a spot where water sits. Once the bottom rail is soft the spindles loosen, the top rail starts to move, and the post it is all attached to begins to work at its base. A covered porch slows this down; it does not stop it, because rain blows in from the side and the porch floor sheds water onto the bottom rail.
Replacing it is a matching job. Front porches are what the house looks like from the street, so the new rail has to fit the columns, the trim and the style: a square-spindle cedar rail on a farmhouse, a turned-spindle rail on a Victorian, a flat PVC or composite rail system on a newer house, or aluminum where you want the thinnest look and the least maintenance. We match the top rail height and profile to what was there unless the old rail was too low, in which case the new one goes to code.
Posts are the part that matters. A rail is only as strong as the post it is bolted to, and porch posts are often just toe-nailed to the floor. We check each post, add through-bolted blocking or a post anchor into the porch framing where it is needed, and mount the rail sections to the posts with the brackets the rail system calls for. The rail should take a hard lean without moving.
What you supply
- Photos: the porch from the street, each run of rail straight on, and a close-up of a post base and the bottom rail
- Rough length of each run and the number of posts, or we take it from the photos
- Material: PVC or composite rail system, cedar, or aluminum, and the spindle style you want
- Color: white or a stock color for PVC and aluminum, paint or stain color for cedar
- Whether the porch steps need a rail or a handrail as part of the job
What JMB supplies
- Removal and haul-away of the old rail, spindles and any rotted post skirts or trim
- Post check and re-anchoring to the porch framing with blocking, through-bolts or post anchors
- New rail sections in PVC, composite, cedar or aluminum, with spindles spaced to code
- Rail brackets, post caps and skirts that go with the rail system
- Stainless or coated fasteners, and sealant where the rail meets the house or a column
- A stair rail or graspable handrail on the porch steps when the job includes it
- Photos of the finished porch in your job folder
- Painting or staining cedar rail when you want it done, quoted as its own line
How it is priced: per project
Quoted in writing from your photos within one business day. What moves the number:
- Linear feet of rail and the number of posts
- PVC or composite rail system vs. cedar built on site vs. aluminum
- Square, turned or metal spindles, and the spacing that sets the count
- Posts that have to be re-anchored, replaced or wrapped
- Steps that need a rail or a graspable handrail
- Porch floor or rim framing that is soft at the post bases
- Matching a historic profile vs. a stock rail system
Grab the top rail at the middle of the longest run and push. Tell us whether the rail moves, the post moves, or both. That tells us how much of the job is the posts.
How long it takes
A single run of rail across the front of a porch: a day. A wrap-around porch with several posts and a stair rail: two to three days.
How your project works
- 1
Send photos, get a written quote
Send three photos of the space and a sentence about what you want. You get a clear, itemized quote within one business day. We only come out to measure first when the job needs a tape measure — no pressure, no games.
- 2
Pick materials, or bring your own
We help you choose profiles and materials that fit the house and the budget, or match your existing millwork exactly — or you buy the door or trim yourself and we install it. Everything is confirmed before the crew is scheduled.
- 3
Clean, precise installation
The crew shows up on time, protects floors and furniture, and installs with tight joints and consistent reveals. Photos of the finished work go in your job folder.
- 4
Walkthrough and invoice
We walk the finished work with you. If anything is not right, we fix it before we call the job done. Then one invoice, paid by check or direct deposit — no card fees, no payment links.
Situations and options
PVC or composite rail system
A boxed rail kit with a top and bottom rail, square or round spindles and brackets, in white or a stock color. No paint, no rot, and the most common replacement on houses built in the last few decades.
Cedar rail built on site
Top and bottom rails and square spindles cut and assembled to fit the porch, with a sloped top on the bottom rail so water runs off. Painted or stained as its own line, or left primed for you.
Aluminum rail
The thinnest spindles and the least upkeep. Powder-coated sections and posts in black, white or bronze, mounted to the existing columns or on their own posts anchored to the framing.
Spindles only
When the rails and posts are sound and only the spindles are rotted, split or missing, we pull them and set new ones in the same holes or on the same rail, spaced to code, in matching wood or PVC.
Porch Railing Replacement — Rotted Front Porch Rails and Spindles: questions, answered
Why is my porch railing rotted at the bottom?
The bottom rail is flat, and every spindle sitting on it makes a joint that holds water. Rain blows onto it, the porch floor sheds water at it, and the paint fails at the spindle joints first. Once water gets into the end grain of the spindles and the top of the bottom rail, the rail goes soft and the spindles loosen. A bottom rail with a sloped top and spindles that do not sit in a pocket lasts far longer, which is how we build the replacement.
Can you replace just the porch spindles?
Yes, if the rails and posts are sound. We pull the old spindles, clean out the holes or the rail face, and set new square or turned spindles in matching wood or PVC at a spacing that passes code. If the bottom rail is soft, replacing spindles into it is wasted money, and we will tell you that from the photos.
How high does a porch railing have to be?
The code sets a minimum guard height for a porch floor that is more than a certain distance above the ground, and a maximum gap between spindles. We build to those. If the old rail was lower than that, we match the porch style but bring the height up to code, and we tell you first so the change in look is not a surprise. A porch close to grade may not need a guard at all, and then the rail is your choice.
What material should a replacement porch rail be?
PVC or composite for the least upkeep, cedar for a painted or stained wood look that matches an older house, aluminum for the thinnest spindles. On a covered porch all three hold up; on an open porch the PVC and aluminum win. We match the columns and the trim, so a house with wood columns usually gets wood or PVC, and a house with aluminum-wrapped columns usually gets aluminum.
Do you fix wobbly porch posts when you replace the railing?
Yes, and it is usually where the wobble comes from. The rail is only as strong as the post. We check each post base, add blocking or a post anchor into the porch framing, through-bolt where the framing allows, and wrap or replace the post if the base is rotted. A rail that is bolted to a post that moves will move too.
Does the porch railing need to be painted?
PVC, composite and aluminum do not. Cedar does, either painted or stained, and it should be finished the first season, including the cut ends and the underside of the rails. Painting or staining is quoted as a separate line on the same quote, or leave the cedar primed and finish it yourself.
Get a written quote for this job
Three photos and a sentence is enough. You hear back within one business day. Or text the photos to 763-204-2099.
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Read morePage reviewed September 24, 2026 · JMB Builders LLC, MN license BC809005 · All exterior trim pages
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