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BigBlue 3T Roofing Demolition Blade
BigBlue 3T in Worm Drive cutting shingles and roof deck
Close up of BigBlue 3T after cutting openings for twenty skylights
BigBlue 3T Roofing Demolition Blade

BigBlue™ 3T Roofing Demolition Blade

A roofing demolition blade built to cut gummy materials including tar and gravel, modified roofing, coal tar pitch, and more!

  • 5x Longer life over framing/demolition blades when cutting dense and gummy materials.
  • Clog free, warp free, and crack free.
  • Everlasting carbide teeth with wide kerf.

7-1/4 in. for circular saws and worm drive saws


BigBlue™ 3T easily cuts through commercial and residential roofing materials and other dense and gummy materials.
  • 4-Ply Tar and Gravel
  • Galvanized Metal
  • Ice Shield
  • Cap Sheet
  • TPO and EPDM
  • Cedar Shakes
  • Rolled Roofing
  • Flashing
  • Gravel Stop
  • Modified Roofing
  • Drip Edge
  • Salvage Edge
  • Shingles and Heavy Nails (5 Layers)
  • Coal Tar Pitch
  • Flashing
  • Hard Board Insulation
  • And Much More!
Save time on commercial or residential jobs and projects.
  • Cut in tight spots where commercial cutters will not fit (under conduit, around makeup air units, and near roof edges).
  • Cut commercial roofing materials without a heavy roof cutter (cut in curbs, small repairs, or maintenance).
  • Cut openings for air conditioning units and skylights.
  • Cut modified roofing into sections (faster than utility knife).
  • Cut multi-layer shingle roofs into sections for easier removal and quicker clean up.
  • Cut 300+ ft. of tar and gravel.
  • Cut 500+ ft. of coal tar pitch (smooth).
  • Cut 5,000+ ft. of shingles and heavy nails (2 layers).
  • Close up of large carbide teeth
    Extreme Strength for Demolition Cuts

    Massive carbide teeth cut through tough materials without chipping or dulling. The extra thick steel body will not warp or crack.

  • wide-kerf-blade
    Extra-wide Kerf Circular Saw Blade

    At just under 1/4 inch, BigBlue™ has the widest kerf available on a 7-1/4 inch circular saw blade.

  • large-gulluts
    No-Clog Design

    Gullets this large never clog... ever. Open space reduces friction and keeps the blade spinning fast. This empowers circular saws and worm drive saws to cut tough construction materials not possible with other blades.

30 Day Money Back Guarantee - 100%30-Day Money-Back Guarantee

We understand skepticism. We have been burned by products that don't live up to their claims too. That is why BigBlue™ 3T comes with a 30-Day Money-Back Guarantee.

Weight 0.5 lbs
Dimensions 7.5 × 7.5 × 0.25 in
Package Quantity

1 Blade, 4-Pack, 8-Pack

Customer Reviews

Based on 23 reviews
Amazing blade

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.




Glad I found you guys!

very happy it does work

it cut clean did not gam up we were able to finish in two day very happy

High Quality Demo Blades

A couple years back I ordered a package of 2 of both the 3T and 5T blades after watching a YouTube video. The gentleman in the video was using the 5T to demo the roof on his barn. He was cutting through several layers of shingles and the 1X boards used for the sheathing underneath, using a direct drive circular saw. I was impressed with how easily the 5T on a sidewinder saw chewed through the material.

I have a roof on a home that I am trying to replace, the biggest challenge has been removing the existing roof. The roofing material is a built up layers of felt and tar with stones in places, on top of that the roof was rehabbed back in the 80's with fiberglass mesh placed in on top with a white acrylic coating over the mesh. The top layer of fiberglass mesh was one of the biggest impediments to cutting the roofing material. Following Smartman Tools suggestion I have used the 3T blades on my worm drive saws. The 3T blades have cut through the built up roof with ease. I was very impressed with the performance and decided to order more of the 3T blades to finish this roofing project. Despite the cost per blade I feel it is well worth the expense to offset the cost of having roofing contractor redo the roof, charging me upwards of $10K and likely turning out a relatively inferior product.