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Old 01-09-2009, 10:43 AM   #1
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Cutting attic floor boards


Hi; It's the question man again;

I am going to need to run some wire in my attic, and will need to cut floor boards in order to access the ceiling space below.
I'm wondering what technique/tools are generally used to cut the boards right over the joists so that when the boards are replaced, they rest on the joists.

I could imagine a mini-circular saw attachment for my 1/2" drill, but the recip saw would not work in this situation.

What do you use?

Thanks

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Old 01-09-2009, 11:16 AM   #2
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Cutting attic floor boards


I would use a circular saw.

Or you can cut next to the 2x4 and nail/screw another 2x4 block next to the original 2x4 so your cut boards can be securely refastened.

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Old 01-09-2009, 11:22 AM   #3
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Cutting attic floor boards


Circular saw with the depth set to the thickness of the floor and sub floor.
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Old 01-09-2009, 11:59 AM   #4
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Cutting attic floor boards


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Originally Posted by AndrewF View Post
I would use a circular saw.

Or you can cut next to the 2x4 and nail/screw another 2x4 block next to the original 2x4 so your cut boards can be securely refastened.
What AndrewF wrote.
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Old 01-09-2009, 12:16 PM   #5
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Cutting attic floor boards


KE is not going to find a sub floor in the attic.

Andrew has the solution.

If you do not have a circular saw, drill a hole to explore for the joist Locations.
Then drill a " hole close to the joist and use a recip or even a compass saw.

When replacing the floor boards cut a 2x4 about 4" longer than the opening. Insert the 2x4 with equal overlap on both sides then use a C clamp on both sides to pull the 2x4 UP tight against the bottom side of the existing floor board. Then predrill through the 2x4 support and secure to the joist with 2” or 3" screws.

If you need to remove a number of boards use a magic marker to make several diagonal marks across the floor so it will be easier to find which board goes where,
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Old 01-09-2009, 01:22 PM   #6
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Cutting attic floor boards


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Originally Posted by PaliBob View Post
KE is not going to find a sub floor in the attic.

Andrew has the solution.

If you do not have a circular saw, drill a hole to explore for the joist Locations.
Then drill a " hole close to the joist and use a recip or even a compass saw.

When replacing the floor boards cut a 2x4 about 4" longer than the opening. Insert the 2x4 with equal overlap on both sides then use a C clamp on both sides to pull the 2x4 UP tight against the bottom side of the existing floor board. Then predrill and secure the 2x4 support with 2” or 3" screws.

If you need to remove a number of boards use a magic marker to make several diagonal marks across the floor so it will be easier to find which board goes where,
Thanks guys; That sounds like what I need to do, since I do not own a circular saw.
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Old 01-09-2009, 01:54 PM   #7
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Cutting attic floor boards


I wouldn't use a reciprocating saw, unless you can be 110% sure that the end of the blade will not hit any electrical, plumbing or HVAC. Take the money you save by doing it yourself and buy a new tool.
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Old 01-09-2009, 06:23 PM   #8
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Cutting attic floor boards


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I wouldn't use a reciprocating saw, unless you can be 110% sure that the end of the blade will not hit any electrical, plumbing or HVAC. Take the money you save by doing it yourself and buy a new tool.
Thanks for that advice. I was thinking about that after my reply. There is a lot of NMB under those boards.
I was thinking I may be able to buy a small circular saw for about $50.
This one should do the job: http://contractorservices.homedepot....b-e7e89cd7e2a6
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Old 01-09-2009, 09:55 PM   #9
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Cutting attic floor boards


KE, to minimize the number of boards you have to remove, see if you can borrow or rent a set of Greenlee Fish Stix.
Fish Stix, GL-540-12, Greenlee 540-24

The 12 footers have three 4' sections that thread together to push (or pull) the cable through the joist bays.
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Old 01-10-2009, 10:45 AM   #10
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Cutting attic floor boards


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KE, to minimize the number of boards you have to remove, see if you can borrow or rent a set of Greenlee Fish Stix.
Fish Stix, GL-540-12, Greenlee 540-24

The 12 footers have three 4' sections that thread together to push (or pull) the cable through the joist bays.
I've already got one. I love it.

The only places I will really need to cut floor boards is where cables come up from wall spaces, and where there are ceiling fixtures below. Otherwise, I plan to make good use of the FishStix.

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