Rockwool chimney plugs

[Holmz]

I recall another thread with Rockwool (TM) stuff this week, I thought I should post the current project.
(Which has been a while in the making.)

The chimneys are 100 years old, and designed for burning coal.
There are some sounds that come through, like cooing birds on the roof, etc. and a slight amount of dust and drafts, which is also where the hound has one of her 8 beds.
We still want some airflow, and just not a sheet of steel in the vent.

If I was smart and industrious, I would do a before and after test with a subwoofer powering the room.
But I expect that the chimney will act like a transmission line or resonant port. 
I can also s pull it  out later if I get where I want measurements.

Internal dimensions 750mm x 250mm (30”x10”)
Steps:

• Cut the rockwool a bit bigger than the birck work (255-260 x 755-760)
• Sew up calico bags to help contain any stray fibres
  • Drill maybe called canvas in the US??? which may have been better.
• Cut the fabric bags a bit large to help get the rockwool in.
  • An alternate plan could be to keep it in a plastic bag with the open end going in first, and then use the slickness of the plastic to pull it out like a magician with a table cloth.
•  Sew long side of the bag into a tube.
• Sew one end on, with just one side as a flap.
• Sew the other end on with all 4 seams.
  • Sort of need to start 5/8 from each corner to facilitate folding, but most sewing type know the drill.
• Turn the whole thing right side out.
• Fill with the Rockwool battens.
• Pin and hand stitch the remaining three seams on the end with the flap.

Likely I’ll use the plastic bag to help “lubricate” them into the chimney holes against the rough brick… which is where a heavier canvas may have been better???

 

[Holmz]

I realised that it was going to take Arnold, Mr T,  or the Hulk fellow to get them up into the gap….
After looking in the mirror, I decided to use a small floor jack, and chunk of pallet wood and coxed em in.

A few words I forgot I knew came out, but one is in place now.

[ctsooner]

You always amaze me with all that you do. I love it. Thanks for sharing.