TYPARŪ Flashing BA - Under A Concrete Floor?? - Masonry - Contractor Talk

TYPARŪ Flashing BA - Under A Concrete Floor??

 
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Old 07-26-2012, 10:03 AM   #1
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TYPARŪ Flashing BA - Under A Concrete Floor??


Ummm...... really? I've never seen this before - have you? The exposure limit is 180 days on this stuff. Won't it deteriorate and leave voids? Or is it just the tape that is Typar? It looks odd to me that it is cupping. The stuff we use never looks like that.
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Old 07-26-2012, 01:53 PM   #2
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Re: TYPARŪ Flashing BA - Under A Concrete Floor??


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Originally Posted by AmeliaP View Post
Ummm...... really? I've never seen this before - have you? The exposure limit is 180 days on this stuff. Won't it deteriorate and leave voids? Or is it just the tape that is Typar? It looks odd to me that it is cupping. The stuff we use never looks like that.
Typar is just the flashing tape and it is Butyl Rubber so 180 days is easy I would think.

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Old 07-26-2012, 02:07 PM   #3
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Re: TYPARŪ Flashing BA - Under A Concrete Floor??


pdf...
http://www.harveybp.com/Pro/docs/pro...Tape_specs.pdf
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Old 07-26-2012, 04:40 PM   #4
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Re: TYPARŪ Flashing BA - Under A Concrete Floor??


It looked odd to me that the foam board was cupping. The stuff we use doesn't do that so I'm wondering what product this image has.
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Old 07-26-2012, 10:15 PM   #5
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Re: TYPARŪ Flashing BA - Under A Concrete Floor??


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It looked odd to me that the foam board was cupping. The stuff we use doesn't do that so I'm wondering what product this image has.
looks like some Firestone insulboard we used to use for roofing...

Will the weight of the pour put it back in place?

http://www.firestonebpco.com/roofing/insulation/iso95/

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Old 07-27-2012, 04:08 AM   #6
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Re: TYPARŪ Flashing BA - Under A Concrete Floor??


The thicker insulation boards seem to cup more. I used seconds for my extension which were a fair bit cheaper. They went over the top of the rafters and were over 4 inches thick. Some of these were cupped. At that thickness the fixings wouldn't get them really straight, so I'm not sure if the weight of concrete would do it, depending on how thick the boards are.

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