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Our large 100+ year old roof had 5 layers of asphalt roofing (over an inch thick) and a layer of sheet metal over 3/4” boards. The 3T blade cut through all of it with a DeWalt circular saw. This blade saved hours of labor.
When the previous home owners had laid the deck, either no spacing or very little spacing was put between the boards. After years of pine needles, leaves, dirt and everything that got trapped I was trying to determine the best way to proceed. I welded to recipro blades together and it "worked" but felt as though you had used a jack hammer. Saw a review of the BigBlue "Nasty" Demo blade and thought what can I lose for that price. Holy Toledo!!!! Nothing stops this blade, dirt, wood, nails, etc, etc. Deck boards now have nearly perfect spacing, didn't use a straight edge, just took my time to follow the "groove". Blade didn't kick, stall, anything - like cutting butter. BigBlue Demo blade is the best.
This blade is amazing! It cut through 3 layers of shingles and 1/2 inch plywood like crazy and turned what would have otherwise been a very difficult job, in to a fairly easy task. I would recommend this blade to anyone who is looking to demo a roof.
Came across Bigblue on YouTube while researching removing a tar and gravel roof system. I bought just one big blue to try it out and damn, this thing was able to slice through 2300sq ft of the 70yr old tar and gravel on my house roof. In some places it was about 1/2” thick, yet no problem for Bigblue. Hasn’t lost or even damaged a tooth yet. Can’t recommend this blade enough for this type of demo. 5 stars for sure.
My deck boards were not spaced when constructed causing moisture issues. I used the Big Blue blade to cut a kerf along the seam lines and it was the perfect solution. Looks good and did the job! Highly recommend the product.
These blades work better than I expected, and I can't seem to dull them. A great time saver. We cut an entire roof of a barn we salvaged with 1 layer T-locks and one layer cedar shake. The 3T we were using is still sharp. One blade arrived defective, and they sent a new one out right away no questions asked.
I'm renovating a 100 year old house and having to remove considerable plaster/lathe. It works great cutting parallel to or perpendicular to the lathe underlayment. The blade seems impervious to the plaster. And the bonus is while maintaining sufficient blade RPM, there is almost no dislodging of adjacent plaster.
This may be a new use for the 5T blade. My 20 year old pressure treated deck is still in great shape, except for the lack of gaps between the boards.
Board swelling, and warping over time eliminated 80% of the gaps, dirt, and other "stuff" filled the remaining 20% of the gaps.When it rained, the deck became a "duck pond", holding water, sometimes for days.
The deck surface is 2X6, rather than the typical 5/4x6, and the 2X6's were installed with the typical "nail width" gap. Well, after many attempts to clean the gaps, I decided to "saw" the gaps to widen them, A regular blade would not cut the treated wood, the blade would clog with the large amount of sawdust being created. A regular blade was too narrow, I even tried stacking three blades on the saw at one time. Slivers would jam in between the blades, making them wobble.
Well, I found the 5T blade, and today I widened the gap on over 400 linear feet of gap, I have that much or more to do tomorrow.
Due to the 2X6's swelling, the gap ranged from zero to no more than 1/8", now I have a uniform 3/16" gap between the deck boards that I cut. We found a coating that will make the deck look great, but, the coating would not have worked with the dirt, and rocks filling the gaps between the boards. I know there were some rocks (small), because I saw the sparks fly when I hit them.
The 5T has SAVED our deck, maybe it is not only for demo, anymore!!??
This blade is all you need to take down a shed with asphalt shingle roof. It worked too easy in my circ saw and made my demolition work a snap.
Love these Blades for cutting through old Roofs to set HVAC Curbs! I bought this pack not because I need them (cause these blades really last so I still have 3 new ones from my last pack) but because I was afraid something may happen and I couldn't get them when I do need them. Hot Knife Through Butter I Say, with NO Gumming Up The Saw, I still can't believe it and I was the one using it!
Every HVAC & Roofing Supply House Should Have These Blades!
Used this blade to saw through three layers of shingles plus 3/4" plywood. The 5T cut through with ease and no binding. Only used one blade for half of the house, will finish second half later. The 5T is still sharp and cuts like a new one. I highly recommend the 5T to anyone who is working on a demo roof job. It will definitely save you time and money and will not drain your muscle power. Works really well on a 71/4" circular saw.
I am in the Hvac industry and have been needing these for years. I was fixing to buy a 1300 roof cutting machine when I came across these. The job I was on was burning up 2 regular framing blades per curb (roughly 22’ or so as this was the thickest roof I’ve ever seen in 25 years). I ordered this blade on Friday night and had the dang thing Monday. I took it to the same job on Tuesday and it was like a hot knife through butter. When I got through with my job the roofers (finally showed to take off the rest of the roof) ask to borrow it and they used the same blade all day and it never gummed up the first tine for either of us! I ordered the contractor pack As soon as I got home!
we tried every blade out there.. also tried making 3 passes with increasing depth.. we ended up with a 2 man operation one on the saw and one spraying wd40 to help reduce the tar buildup... this little medieval looking blade is scary looking, it aint meant for the faint hearted, but it made the process 5x faster, saved cases of wd, numerous blades, and went to a 1 man process.. roughly equivalent to, a >90% labor and material savings on this portion of work
The only blade that would work on a 1-¹/² 2 layer nail embedded subfloor demo job Diablo Demo Demon blades lasted 5' of and were spent, Lenox lasted 15' . I thought that's not good these blades suck I need a serious Demo blade, searched online found the Big Blue order 4, cut for an hour ordered 4 more! Must have a worm drive!
I did roofing all my life and we would have to cut though the peeked and we went through saw blades by the hundreds I bought this blade and I cut though 2 layers of shingles and the plywood it took me about 5 minutes to cut though it all very happy it’s a 10 star