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Cutting A New Window Into Steel Siding

 
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Old 10-23-2012, 03:45 PM   #1
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Cutting A New Window Into Steel Siding


I am installing a new window and need to cut the steel siding larger than the current opening for the nail flange. What is the best tool to cut a straight line both vertically and horizontally in 4" steel double lap siding.

I searched the threads and only found cutting siding for install.

Was thinking of using a Freud 48 tooth blade for the verticals and snips for the horizontal cuts. Finish corners w/snips.

Any other recommendations?
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Old 10-23-2012, 03:48 PM   #2
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Re: Cutting A New Window Into Steel Siding


Mods, could you help me out as I posted in wrong section

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Old 10-23-2012, 04:22 PM   #3
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Re: Cutting A New Window Into Steel Siding


how i most likely would try to approach this would be to remove the siding you need so you can flash it nice

if you can't i would cut the siding back say at least 3 1/2'' bigger all the way around,flash it best you can and trim then J around the trim

even with a J at the head i still like to use a drip

not easy as it all needs to go in at the right sequence
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Old 10-23-2012, 04:35 PM   #4
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Re: Cutting A New Window Into Steel Siding


We had to do this recently on a pole building. We cut the steel in place about 1/4" larger than the window. I built a framed box around the whole window, set the window into the box, properly flashed it,carefully fit J channel around the cut steel edge, and fit the whole assembly into the opening. If you don't have easy access to the inside this will not work.
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Old 10-23-2012, 05:01 PM   #5
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Re: Cutting A New Window Into Steel Siding


Yeah Tom, that was my thought too. The window sits under a 2foot eav so the drip cap is mute point. What would you use to cut the still siding?
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Old 10-23-2012, 05:01 PM   #6
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Re: Cutting A New Window Into Steel Siding


Quote:
Originally Posted by Tom Struble View Post
how i most likely would try to approach this would be to remove the siding you need so you can flash it nice
It's not that hard to R & R... Unless you've got a two story or something..
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Old 10-23-2012, 07:06 PM   #7
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Re: Cutting A New Window Into Steel Siding


Snips would work in most cases, or a grinder with a cutoff blade.
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Old 10-23-2012, 07:17 PM   #8
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Re: Cutting A New Window Into Steel Siding


I'm experimenting on it tomorrow. Saw first and snips on the corners. Got the scaffold up today in the rain and the windows and doors delivered.
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Old 10-23-2012, 07:35 PM   #9
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Re: Cutting A New Window Into Steel Siding


i'd use the saw all the way around,but Randy should be here soon,he works with steel all the time
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Old 10-23-2012, 07:56 PM   #10
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Re: Cutting A New Window Into Steel Siding


Cool, I hope he is of the same mimd set.
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Old 10-23-2012, 08:04 PM   #11
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Re: Cutting A New Window Into Steel Siding


God..i hope for his sake he's not
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Old 10-23-2012, 09:19 PM   #12
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Re: Cutting A New Window Into Steel Siding


When I have done something like this in the past which is not very often. Have done things a couple of ways . If at all doable torn the wall down did the window, flashed and resided. Nice thing about this is things can be done right. Bad side takes time.

This past summer worked on a house where they added a sunroom, two stories and big wall. So as much as I hate using a saw to cut steel, cut a plumb line up the wall then removed all that was needed. set the saw shallow to not cut house wrap and use snip and electric as much as I could . turned out great.

The thing about cuting it out just for the window flange is you end up just sliding the j in behind the planels .

I take it they don't have brick molding around them now. We did some a year ago where we removed the molding then put the windows in , flashed and replaced molding and then capped the molding.

Toms ideal of a wider trim would be good way , but if only doing a few they tend to look out of place.

Unlike vinyl steel is not an easy R&R, gota start at the top and work down.

So saw only if you must , and snips . If lot of moisture in yur area you could paint the egde you saw to stop any rusting.

Hope it works out good for you .
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Old 10-23-2012, 10:14 PM   #13
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Re: Cutting A New Window Into Steel Siding


I know everybody is concerned about house wrap, but there is no house wrap, only builder board for sheathing. Thanks for your info Randy. The siding is no longer made and it is so faded I cannot match it. I am trimming out window with 1 x 3 in white with a white j-channel. Flashing correctly per instruction. Luckily the top of the window touches the 2 ft overhanging soffit to keep moisture out.
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Old 10-30-2012, 01:49 PM   #14
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Re: Cutting A New Window Into Steel Siding


Update, cut the steel siding with metal saw blade-48 tooth diablo. Went easily through with blade in correctly. Cut out extra for a 1 x 4 trim, put in j-channel first and then nailed the 1x and caulked the whole thing. Very little sparks but builder board everywhere.
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Old 10-30-2012, 01:57 PM   #15
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Re: Cutting A New Window Into Steel Siding


I'm in the process of having to do something similar. Normally I would remove and replace which we are doing in some area's that makes sense. In some area's the wall panels are 30' and run vertical. We have been using a diablo blade and grinder with a cut-off. I am surprised and how well the cut blade allows you to keep a straight line.

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