Granulated Mod Bit or 90 Lb Felt

[palmettoinspect]

I'm looking at this screen porch low slope roof that was recently replaced. It's a really ugly install. The roofer called in 90 lb felt, but it looks like the top layer of a granulated mod bit roof to me that was installed over the existing roof. Can anyone clarify from these pictures?  

 

Thanks,

Kiel

[Marc]

I agree it's Mod Bit.  The folds alone make it a defective install.  Looks like it was neither mopped nor torched but attached with a generous application of roofing cement and a few surface nails.  It's the classic DIY, nothing professional about it.  Not a problem over a screened porch if the buyer doesn't mind occasional leaks, otherwise replace it.

[Jim Katen]

It might be asphalt roll roofing. (The wrinkles and the thin edge in the last picture suggest this.) Try to tear an edge. If it tears easily, it's roll roofing. If you can't tear it, it's mod bit. 

The installation is a disgrace. 

[John Kogel]

Isn't Mod Bit glossy black on the underside? Yes, it is, and that is not.

Does anybody that installs roofing automatically become a "roofer"?  Seems to be the case, unfortunately.

Edited November 18, 2017 by John Kogel

[Chad Fabry]

Looks like crappy rolled roofing. Wait. That's redundant.

 

[John Kogel]

It's the good stuff. The crappy stuff is 30 lb. 

[palmettoinspect]

Yes, very easy to tear!  Thank you all for the replies.  

[Jim Baird]

...the little trough where the upper slope meets the lower one is a drainage ditch.  Hope it slopes to one side or the other like a gutter.  BTW those shingles on the upper slope look fried like a rasher of bacon by their shipwrecked seaman's exposure to too much sun.

[palmettoinspect]

Jim, you're correct!!!!

[Roofer Den]

I have been roofing for 40 years, it is 90# granulated roll roofing or felt. It will hold for 8 to 10 years if it's properly sealed. I would have used a torch down like derby gum or a rubber I like whale skin, but for a less expensive roof I would go ahead with the 90 with a 4" gravel guard drip down both sides snipped, folded and sealed at the bottom edge. With a T-drip on the drain edge, with an  8" wide layer of Bull and glass around the outer edge on top of the 90, with a nice smooth taper so water can't stand against the bull and glass,  except on the drain edge with the T-drip. The T- drip should be under the 90 and that is the side you should go up on if it is absolutely necessary.  Then stay off the roof. Watch out that bull will get on your ear if you talk about it on the phone!

 

 

 

 

Edited July 2 by Roofer Den
mistake in directions.

[Jim Katen]

On 7/2/2021 at 2:07 AM, Roofer Den said:

I have been roofing for 40 years, it is 90# granulated roll roofing or felt. It will hold for 8 to 10 years if it's properly sealed.

With a little luck, yes. 

But this one wasn't and won't. 

[InspectorBuck]

On 7/2/2021 at 5:07 AM, Roofer Den said:

I have been roofing for 40 years, it is 90# granulated roll roofing or felt. It will hold for 8 to 10 years if it's properly sealed. I would have used a torch down like derby gum or a rubber I like whale skin, but for a less expensive roof I would go ahead with the 90 with a 4" gravel guard drip down both sides snipped, folded and sealed at the bottom edge. With a T-drip on the drain edge, with an  8" wide layer of Bull and glass around the outer edge on top of the 90, with a nice smooth taper so water can't stand against the bull and glass,  except on the drain edge with the T-drip. The T- drip should be under the 90 and that is the side you should go up on if it is absolutely necessary.  Then stay off the roof. Watch out that bull will get on your ear if you talk about it on the phone!

 

 

 

 

You're right on! That's what I came to say, but you said it way better!