To start the saw in cement backer board drill a hole though the backer board large enough for the jigsaw blade or make a plunge cut with the blade in the backer board.
Cutting hardie board siding with jigsaw.
Setting up your cutting station correctly is just as important as selecting the right tools.
A thin blade kerf reduces material extraction reduces heat and adds to performance.
You should take a jigsaw with a metal blade or a carbide grit blade.
To cut holes in cement backer board to use under tile equip a portable jigsaw or sabre saw with a metal cutting blade.
Just sharing some of the different methods i ve used for cutting hardieboard siding.
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Cut the trim board with the saw.
The bosch carbide edge jig saw blade provides 10x life versus standard bi metal blades featuring a carbide tipped edge designed for cutting abrasive building materials.
No way would i rip fiber board of any kind without dust collection.
Cutting station best practices.
In this video this old house general contractor tom silva shares his secrets for working with fiber cement siding.
It also snaps the end of the cut so the siding has to be cut face up with the bottom toward you.
The hardi blade only has four teeth.
Unlike score and snap you ll need to use a surface.
When cutting fiber cement siding with circular saw use a blade that has only four or six teeth.
You should take a jigsaw with a metal blade or a carbide grit blade.
Wait for the saw blade to warm up and come to full rpm before.
Always be sure to wear dust and eye protection when cutting cement backer board.
Mark where you d like to cut the board.
James hardie has collaborated with a number of installers to identify easy setups that are effective affordable and will help you meet osha s compliance standards.
To keep dust to a minimum use a circular saw that s equipped with either a dust collection bag or electric fan that blows dust into a bucket.
Havent tried the jigsaw blade or an actual hardi blade for circular saw.
Like the score and snap method set a straightedge across your sheet.
Lay your cement board out on a work table or between two saw horses.
Keep a firmer grip on the board than with regular wood.