How to build a culvert?

[brevik]

Feeling a bit unsure where this really fits in but anyway....

We have a company that is installing an FTX solution in our 1960s split-level house with slightly high radon levels.

It looks like they will be finished this Friday and then some enclosure of the ventilation pipes remains for me. I need to do the following:

1. Enclose a 9-meter long 100mm pipe that is located in the corner between the wall and ceiling (a horizontal duct)

2. Enclose a 4-meter long 200mm pipe that is located in the corner between the wall and ceiling (a horizontal duct)

3. Enclose 2 * 200mm pipes that are located in a corner in a room and go from floor to ceiling (a vertical duct).

Now to my question.... What is the easiest way to build a duct and what materials should be used? One of the ducts will be below ground level in a split-level floor, which means you might need to consider what material to use.

Please explain step by step

Thanks in advance.

 

[saturnus]

Use the rule 45x45 (approx.) which you screw along the pipe on the wall and ceiling. Try to get the rule as close behind the pipe as possible, so the drum doesn't become unnecessarily large. Cut strips of chipboard or drywall to the measurement (120--130mm) that you see they need to be in order to align with the ceiling and wall. Cut a rule and screw along one edge of the chipboard/drywall, and then screw the other panel strip together with the first so that both strips form an angle and are screwed together. Then lift the panel angle up and screw it to the ceiling/wall stud. And then another and another... Fill and weave/wallpaper the box, to hide it, =my tip. Be careful to measure and check so that the rule inside the angle isn't too large, so it doesn't hit the pipe; 30x30mm should be enough.

 

[zankan]

The above works, but here's a tip ...

Use plåthörn 50'5 to reduce more on the drum... Attach these to the ceiling and wall.

First, hang a sheet from the ceiling down... Then attach a metal angle bracket to it and then do the bottom edge...
Feel free to use double drywall for the sake of sound...

 

[saturnus]

The above works but here's another tip...
Use metal corners 50'5 to further reduce the drum... Attach these to the ceiling and walls.

First hang up the board from the ceiling down... Then attach a metal angle to this and then run along the bottom edge.
Feel free to use double drywall for the sake of sound...

This can also work naturally, with some concern for resonance noise :

 

[brevik]

Thank you for the good answer.

Resonance sound? Do you mean that the sound from the ventilation might be able to pass through?

I'm not quite following

 

[saturnus]

When using sheet metal/angles for mounting, as in this case in a drum, it is not uncommon for resonance noise to occur because the sheets here do not lie flush against the mounting all the way. It is therefore also important that the pipe itself is mounted separately and does not lie against the drum. What you can do to use metal angles, which might be simpler, is to place insulation around the pipe at a few points in the drum, then the risk of resonance noise ceases. After all, it is a drum you are building, and such structures typically transmit sound or vibrations.

 

[brevik]

Thank you for the response. In one place, the wall is below ground, and there I suspect I need to use metal studs.

 

[synpunkter]

No insulation at all on the spiral duct?

 

[saturnus]

No insulation at all on the spiral duct?

Oh really, and why not?? Mine are embedded in insulation in the attic for the exhaust air.

 

[Mats]

It was a question. Not a stance.

 

[zankan]

When using metal plates/angles for mounting, as in this case in a drum, it is not uncommon for resonance noise to occur, because the panels here do not lie flush against the mounting all the way. It is therefore also important that the pipe itself is mounted separately and does not touch the drum. What you can do to use metal angles, which might make it easier, is to place insulation around the pipe in a few places in the drum, then the risk of resonance noise will cease. After all, you are going to build a drum, and such usually transmits sound or vibrations.

You must excuse me, but the attachment of the panels and the resonance are two completely different things... In my world, resonance occurs at a given frequency in a more or less closed system. Sure, a poor attachment is a poor attachment, and metal or wood doesn't matter in this case...

And regarding insulation, it is clever to use it in all forms of drums/slots to reduce resonance... Then most importantly, multiple layers of panels are standard, usually 2 layers, specifically for sound and fire...

 

[saturnus]

It was a question. Not a standpoint

Sorry, I was pondering over it at first.

 

[synpunkter]

With my little post, a question, I meant that insulation on the vent pipes is more important than whether one builds with wood/metal/drywall etc.

 

[brevik]

Could it be an idea to line the drum internally with some form of soundproofing mat or similar?

 

[saturnus]

Could it be a good idea to line the inside of the drum with some form of soundproofing mat or similar??

I think it might be too deadened, regular insulation is sufficient, but don't pack it.