PVC vs EMT metal conduit - which holds up better long term?
Building my enclosure frame and trying to decide between PVC and metal EMT conduit.
PVC seems easier to work with and cheaper, but I'm worried about it sagging or warping over time, especially in my garage where temps fluctuate.
EMT is more permanent but requires different connectors and might be overkill?
Anyone built with both over the years? Which would you choose if starting over?
My enclosure will be 10ft wide x 10ft deep x 8ft tall.
5 Replies
Built both in my lifetime. Here's my take:
PVC: Easier to build, cheaper, but definitely sags over time, especially in heat. Mine started drooping after about 18 months in the garage.
EMT: Bit more work upfront but way more rigid and permanent feeling. My current EMT frame has been perfect for 3 years.
If this is a permanent installation, go EMT. If you might move it or tear it down, PVC is fine.
EMT all the way. Get the 1" conduit and the set screw fittings from Home Depot. Total cost for a 10x10x8 frame was about $120 in materials.
Pro tip: Rent a conduit bender if you want to do curved top corners. Looks way cleaner than 90-degree angles.
I went with PVC because I rent and needed something I could easily take apart and move. 3 years later, still using the same frame.
Key is to use schedule 40 PVC (thicker walls) and furniture-grade fittings. The cheap thin PVC will definitely sag.
Third option: 80/20 aluminum extrusion. More expensive than both but super professional looking and infinitely adjustable. Can add accessories anywhere.
I spent about $400 on 80/20 for my frame but it looks like a commercial setup.
One more vote for EMT. Paint it matte black and it practically disappears. Looks very clean.