Making a Raised Bed from Metal Roofing Materials

Recently I put together my newest raised bed.  I was inspired by some pictures I’ve seen lately where metal roofing materials were used for the sides.  It was a very cool look that I wanted to see if I could replicate for my garden.  I went to the store and gathered 9 2×4’s, 3 steel roofing panels, and a box of deck screws.  The total material cost for this raised bed is around $100 but you could greatly diminish that if you could find old metal roofing from a barn or a shed.  The metal roofing panels were $15 each which adds up to almost half the project.

I built the side frames for the raised beds first.  The 8′ sides used full length 2x4s with 3 21 1/4 inch vertical pieces as supports on the sides and the middle.  The 4′ sides only used 2 supports per side which made for a total of 10 vertical support pieces.  I cut one roofing panel into two 45″ pieces and used the full length of the other two panels.  The sides are set at 48″ but I needed a gap on either end of the 48″ sides for the wood corners to contact each other for a smooth connection.

The construction of this bed is pretty simple but it does take more time to build than a typical wooden raised bed where you simply screw the corners of the wood together.  The metal sided raised bed is very tall at around 28 inches but is a good height for anyone who may have health issues that prevent them from bending over to do garden work.  At this height you can do all the maintenance from a standing position.

The big challenge will be filling the bed.  I’ll begin with a layer of straw bales in the bottom and layer with compost, newspapers, leaves, grass clippings, soil, and any other organic material I can find!

Here’s a video on the construction of this metal raised bed. Enjoy!

6 thoughts on “Making a Raised Bed from Metal Roofing Materials”

  1. Dave, I really like this and now I have questions!

    1) Were you screwing in your deck screws at an angle? Any special tools needed?
    2) What did you use to cut your metal? AND
    3) Do you think using painted roofing will mitigate the reaction between the metal and the treated wood? (I have lots from prev. proj.)
    4) Do you think that much straw bale on the bottom will rob your fruits and veg of nitrogen, and if so, what will you supplement with?

    This project really looks awesome! Thank you for your answers to my questions. ~Lynda

  2. Planning on putting up some raised beds this summer so they are ready for next season…I know..kinda late. This is good info and I will definitely be considering it as part of my options.


  3. Dave,

    My husband and I constructed very similar raised beds several years ago and have been very pleased. Although we chose to rip our roofing leaving our overall height at around 13' you could make the bed at any height you desired. To conquer the problem of bending over to tend the beds, we use a wooded "seat" that rests on the rails of two beds. I can slide the seat from one end to the other or completely remove it. Our oldest beds are about 5yrs old and still going er… I mean growing strong!

    1. I didn't know how to add a pic here so I added a picture to your FB page so that you could get an idea of what our beds look like. Although you can't see the bottom of the bed in the pic, I wanted to note that we did not use any lumber along the bottom edge so we have had no rot. We also don't have wood in our corners, we used aluminum flashing that we bent to a 90* angle there instead of wood. We have had no issues with stability because the rebar is driven close to 24" into the ground. I'll try to dig up a better pic and add that to FB as well.


  4. Hi Dave,
    My wife and I are both retired now and very much interested in building raised bed gardens. As any couple that's been married for 45 years, we don' always agree on everything. I want to use some 4×4 posts that I've had to build the frame and the legs to be able to adjust the overall height suited to our needs. The center line of the posts would make a 4'x8' opening for the bed. Then use 2"x12" beams sitting on top of the outside edge of the posts, leaving a 2" ledge on the inside of the posts. Then use some 1"x2"x4' boards for bracing across the length of the bed. This is where my wife and I disagree. I would then put a 4'x8' length of roofing sheet metal secured to the bracing and with holes drilled into it to allow for drainage, and then put the soil directly on top of that. My wife thinks that it would be dangerous to have the soil in direct contact with the sheet metal, causing some kind of toxic reaction with the soil and absorbed into the veggies, etc. I honestly don't know, but if it didn't it should by far outlast the wood in the frame. What do you think? I don't want to start until I have some guidance…thanks.

    Bill and Shirley

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