Leave old shingles under new siding?

Hi,
First: is it possible to search the breaktime discussion boards? I can’t seem to find a place to do that.
No to the question at hand: I want to add rigid insulation to the exterior of my house (I’m installing new windows and siding, and thought to add insulation as well) but I’ve had a lot of conflicting advice.
Can I leave the old shingles in place if they’re dry, and install the insulation over that?
Simplest would be to leave the old shingles, apply insulation, install new windows, then add new clapboard. I’ve read a number of articles on FHB that cover various parts of this process, but haven’t found one that specifically applies to a renovation.
Thanks for any advice.
Replies
http://forums.taunton.com/n/find/find.asp?webtag=tp-breaktime
it is in the left column at top.
Sometimes the search function fails to function. It likes its naps.
Welcome to the
Taunton University of Knowledge FHB Campus at Breaktime.
where ...
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As a general rule, you are going to get a better job for very little more work to remove the old siding first. remove the mental block you have about how much work that will be, because by trying to work over it you will be creating more troubles and more work.
here is another thread that I think touches on the subject.
http://forums.taunton.com/n/mb/message.asp?webtag=tp-breaktime&msg=112201.1
Welcome to the
Taunton University of Knowledge FHB Campus at Breaktime.
where ...
Excellence is its own reward!
Please do not side over the existing shingles. That's half-assed and will either look bad right away or come back to haunt you later. I've worked on way too many houses that suffered from a corner-cutting remodeler in the past and it always takes more time and money to fix later what should have been done right the first time.
Thanks for the advice. Pretty much confirms my gut feeling...though I can't say I'm excited about removing two layers of old shingles, in addition to the vinyl siding on top.
I was awake much of last night, wrapping my head around this project. Under a seperate post I'm going to lay out my current plan for these walls; I hope you and Piffin will share your thoughts again.
>"remove the mental block you have about how much work that will be, because by trying to work over it you will be creating more troubles and more work."<
Crazy how smart he is sometimes, huh.
On, that vinyl thing - get some heavy gloves, grab it at the bottom, pull hard, go to next wall.
I can't see it from here, But I'm bettin' it comes off a whole lot faster than it took to put it on.
http://www.rusko.com/View Image
a shingle ripper like the one above works great to remove vinyl siding, one great advantage is that you can demo the siding from the ground with no need of a ladder, it also works great for pulling the nail that remain that dont come out when you pull down the siding
They come off a lot easier than they go on and you'll have the opportunity to see what's beneath and repair and properly detail windows, water table, etc.http://www.quittintime.com/ View Image