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Figuring out roof support: choosing between rafters and trusses

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(@patriciabrewer)
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We went with trusses when we built our place, mostly because it was cheaper and simpler at the time. I do sometimes wish we had the openness rafters can offer, but honestly, after watching my neighbor go through structural reinforcement headaches (and the extra costs that came with them), I'm glad we stuck with trusses. Sure, HVAC planning was a bit of a puzzle, but nothing compared to the stress he went through trying to open up his floor plan after the fact...


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ericbeekeeper
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Reading your experience, I'm curious—did you find that the HVAC puzzle was mostly about routing ducts around the truss webs, or was it more about limited space overall? I've seen a few builds where the trusses ended up making HVAC installation trickier than expected, especially when trying to get good airflow distribution.

We had a similar debate during our renovation a couple of years back. Rafters were tempting for that open, airy feel, but after talking to our contractor and a couple engineers, we realized we'd be biting off more than we could chew structurally. I remember one engineer said something along the lines of, "Sure, you can do rafters—but are you ready to pay for all that open space?" It stuck with me because that's exactly what happened to a friend of mine who went with rafters. Beautiful ceilings, sure, but the reinforcement costs and the extra insulation needed really added up.

On the other hand, I've also seen some really clever designs that use trusses but still manage to incorporate vaulted ceilings or partial openness. Did you ever look into those hybrid options, or was simplicity your main deciding factor?

I guess it's always a trade-off between aesthetics and practicality. Sometimes I wonder if people underestimate how much structural planning goes into those open ceiling designs...


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jakeexplorer
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Honestly, the HVAC puzzle usually boils down to a bit of both—tight spaces AND routing around truss webs. But if you're set on trusses and still want that open feel, here's a quick trick: look into scissor trusses. They give you that vaulted ceiling without the structural headaches of rafters. Just make sure your HVAC guy doesn't hate you afterward...been there, done that, got the dirty looks.


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marketing_charlie
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"Just make sure your HVAC guy doesn't hate you afterward...been there, done that, got the dirty looks."

Haha, can confirm—HVAC guys have perfected the art of the silent glare. Scissor trusses are great for that open feel, but yeah, they can make ductwork a bit of a circus act. Had one job where the HVAC installer jokingly threatened to bill me extra for "gymnastics training." Still, beats dealing with rafters and their structural drama any day.


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medicine757
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"Had one job where the HVAC installer jokingly threatened to bill me extra for 'gymnastics training.'"

Haha, that's a good one—I can definitely picture that scenario. When we were renovating our attic space, I went back and forth between rafters and trusses for weeks. Budget-wise, trusses seemed like the clear winner, but I was worried about exactly this issue with ductwork and wiring. Ended up going with scissor trusses anyway because the open ceiling was just too appealing to pass up.

The HVAC guy who came out was pretty good-natured about it, but he did mention (more than once) that he'd never had to squeeze through such tight spaces before. At one point, he joked that he should've brought his kid along—"smaller hands," he said. I felt a bit guilty, but honestly, the end result was worth it. The vaulted ceiling really opened up the room and made it feel twice as spacious.

I think as long as you're upfront about the situation and maybe offer some coffee or snacks (or even pizza if it's a long day), most contractors appreciate the gesture and take it in stride. They're used to tricky jobs, after all. And hey, at least with trusses you don't have to worry as much about structural surprises down the road—rafters can sometimes hide unpleasant issues that pop up later.

Either way, sounds like you're on the right track. Good luck with your project...and your HVAC guy!


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