Author Topic: Building a new basement suite in 1911 home. How to limit thumping from above?  (Read 2465 times)


  • Guest
Hi everyone,

I’m getting ready to build a 900 sqft basement suite in the basement (ground level actually) of a 4-story 1912 character home in British Columbia. This suite needs to be as soundproof as physically possible. I will be using double 5/8 dry wall, resilient channel, SafeNSound, solid doors, and flush mount lights.

My biggest concern is limiting the footstep noise from the main home into the suite. I have young kids who run and jump at all hours. All of the floors in the upstairs are original Fir, and some oak. I am not willing to rip up these floors to install underlay. That said, the ceiling and joists in the basement are fully exposed, so I can use that to my advantage.

Are there any structural things I can do (e.g. adding more bracing between joists) to help stop the thumping from footsteps upstairs from pissing of the suite tenants? I know there will always be some sound, but I’d like to take as many preventative measure as possible. My only thought right now is to install as many braces as possible under the old Fir floor to limit creaking and provide more structural strength.

Anything else?


Jimmy Rig

Randy S

  • Guest
yes you can take another layer of 5/8" drywall and glue and screw it up in between the joist to the bottom of the subfloor to reduce the drum head effect and add mass.
Also when you hang your drywall on the channel make sure you leave a 1/4" around the entire perimeter and fill each layer with acoustic caulk finish wet and do not tape and mud the perimeter.
also make sure that when screwing the drywall to the channel you do not short the channel by having screw tips make contact to any joist or cross bracing.

you need to make sure you resolve any floor squeaks before your soundproofing begins because soundproofing will not reduce this type of problem.

Best Regards,

Randy S.