Greenbrier, AR, US
I've encountered this problem numerous times and this seems to be a good approach. May I suggest using a heat gun as it produces far more heat than a hair dryer. Also, the addition of vent holes around the bottom perimeter of the box will allow air to circulate providing more heat. Free-flowing air will reduce damaging back pressure on the appliance. Good idea, thanks for the sharing the tip.
Another similar option is to cut the wanted hole size in a scrap piece of 3/4 plywood, then align the piece where you want the new hole in the floor or wall, fasten it with screws, then use it to keep your holesaw perfectly aligned. It works for keeping a hole perfectly align even if there is no previous hole to cause problems.
There are many benefits to working alone, it is not just about how much money you can or cannot earn. You alone control the quality of the product, you don't have to depend on the poor work ethic that afflicts so many, you avoid the downtime associated with other workers, the serenity and peace are priceless, and the joy and satisfaction of providing craftsmanship that has received your full attention are unparalleled. I've been working alone for many years and I would not trade it for double the money. There is far more to life than mere financial gain.
There are several other effective tools for serious nail pulling. Come on FH, surely you have these at your disposal for demonstration. And yes, get yourself a bucket to toss those extracted nails into...collect them and make sure they are part of your next load of recycles.
Along with this I suggest to avoid further damaging the old trim, that instead of punching or pulling finish nails out of the face of the trim, pull them through the back. A plier-type nail puller like The Extractor™ works really good on this application.
I have used this method for small batches for years, however I have found it best to first add water and then add just a little dry mix at time, mixing well, then adding more until I have the amount and consistency I want. This puts less stress on the drill...and your wrists..
Flipping those batts over with the kraft face down makes cutting even easier whether using a kitchen knife or utility knife. Compressing the fiberglass with a heavy straight edge also helps. I also use a cutting board made of plywood marked off in inch increments to eliminate stretching a measuring tape across the unwieldy blanket of fiberglass.
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