cutting opening in hot mop roof

john02139May 5, 2013

I would like recommendations on best way to cut an access opening in my roof about 2 foot x 4 foot. Original roofing and one replacement add to about 1 1/2 inches total dense black tarry/felty/papery stuff. This does not include underlying wood deck. I would like to use skill saw so that I can cut through roofing and wood deck separately. If I do, what would be the ideal blade to use. I realize it may not be of much use once I'm done. Are there other ways besides using skill saw. I made a small access opening from the bottom using a reciprocating saw - a miserable job. Thankfully the big opening will be from the top.

Thanks

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millworkman

If you don't want it to leak, call a professional as you sound over your head already!

    Bookmark   May 5, 2013 at 9:40AM
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brickeyee

This is demo saw land (Sawzall).

Make sure you have plenty of spare blades.

A roofer would be a much better choice since they will know how to curb the opening and prevent water from entering.

    Bookmark   May 5, 2013 at 3:20PM
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randy427

Most of the plunging and cutting can be done with a demolition saw. A recip saw may be needed for finishing the corners.
How are you bracing for the rafters being removed?

Here is a link that might be useful: Demolition Saw

    Bookmark   May 5, 2013 at 4:22PM
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PRO
Sophie Wheeler

Disaster waiting to happen. Call a professional if you don't want the roof to collapse or your house to leak.

    Bookmark   May 5, 2013 at 4:40PM
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snoonyb

The reason that you are receiving the variety of responses is that you have only asked, and elected to omit the why.
All of the end products do not have a standard methodology for weather protection.

    Bookmark   May 5, 2013 at 8:25PM
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