What thickness did you use...1/4, 1/2 or 3/4? Thanks.
1/2” Homasote on top of 3/4” plywood.
I use 1/2 inch.
1/2inch. Cut it with a knife blade on your saw for no dust.
1/2 Homasote over 1/2 in Plywood!!!
Use a Plywood Blade in your Power Saw to cut the Homasote!! However, saw “OUTSIDE” !!!
1/2" on top of 1/2 or 5/8 seems to be the ticket. I Used 1/2" Screw homasote to plywood and make sure anything on top is not screwed in further than your homasote (no noise/vibration transfer across the 2 media). Some glue, but if you want to cut in to place a structure, it is easier than chipping out glued pieces from the plywood board.
As for cutting. The sawing method above works, but I used a dermal saw-Max with a vacuum in the other hand. No muss, no fuss.
If you do a thorough search on this subject you could write a college dissertation and come out with more questions than you posted here. It is a somewhat common subject. I think you will be glad you are suing the homasote.
Cut it by hand using an Airway #6 knife. 4 or 5 passes. Clean no dust. Cut curves easy. Replace blades frequently.
This knife uses the #25 straight blade, order them with the knife. Sometimes at HD.
This is like a box cutter but much thinner and way more sharper. It has a shaving quality edge on it. It will not bind up in a deep cut. Caution: you can cut a finger to the bone before you feel it enter the skin. Ask me how I know.
No dust, just a clean cut. I use a lot of blades. I love neat crisp edges.
This is one of my TT locations.
Knife and blades available at floor covering supply houses.
Tom, Thank you for showing us the Airway #6 knife. I have been using a straight box cutter/utility knife. The angle on the handle looks much easier to use!
I hadn’t mentioned I started using a knife instead of a saw, but I agree with Tom, 5 or 6 passes does it. Make sure to keep fingers out of the way. No, I do not know from experience.
For Airway hand cutting:
Using A CARPENTER PENCIL OR BALL POINT PEN, draw a fine line with a firm hand to make a slight depression. Then drag the knife, with a new blade, lightly over the groove which further pronounces it. Pass a second time and add a little pressure. Now you have a workable slit.
Proceed with increasingly firm passes. If you go out of the slit then reverse direction so as to avoid repeating the error. After a couple of slices you will have it down pat.