Roofing discussion!!!

[ovrszd]

Don't think I want to use that roofer. Don't like the idea of putting tin over shingles. Not the most even base. Certainly would have want him to be rolling the tar paper vertically.

Ralph

As I said to Steppenwolfe, it don't like the idea, tell us why? And explain how it should have been done?

 

[ovrszd]

'A few bucks' could double or triple a job cost. I've got over $7,500 in my metal roof and that's over existing shingles. No way I could have afforded a full tear off. I don't know how long it will last before problems develop, but I hope I'm long gone before then.

That's why I keep asking for explanations. Easy to condemn a method if you don't have to explain reasons and cost to do it the "right" way.

 

[Diggin It]

Every contractor and supplier I talked to said to nail 1x4s over the existing shingles and screw the panels to those. None mentioned paper.

The only alternative was a full tear off down to the decking, replace/repair any bad boards, then apply paper, then the 1x4s and panels.

 

[nwut05]

Thanks for the input so far, I never thought about it just being used as a barrier between the shingles and the tin for abrasive block. I was only concerned about the water leaking from either rain or condensation. But that's why i wanted to get other input. I am not a proclaimed builder, carpenter or roofer. but I did build my own house, took 3 1/2 years but i did it slowly from ground up and passed all inspections through the county, when building inspector came out periodically.
ALSO:
During my conversation with this roofer as to why he did it this way, the subject of stripping the tin also came up. you know putting wooden strips between the tin and the sub-roof, and he stated he was against that also. His reasoning was that tin will condensate when cold air gets under it. and those bigger air gaps created by the stripping would let the tin condensate easier/quicker. ??? again i do not know if he right or wrong just seen a use of felt that i thought was improper. and this curiosity and conversation led to other things, and before feelings got hurt i quit and went back to feed'n cattle with a few more questions than answers and thats why i put it out here.

 

[Diggin It]

His reasoning was that tin will condensate when cold air gets under it. and those bigger air gaps created by the stripping would let the tin condensate easier/quicker.

And mine told me just the opposite ... that the gaps would allow better airflow from the eave up to the ridge which would help prevent issues.

 

[ovrszd]

I sortta agree with him in regards to condensation.

I built an all metal building 10 years ago. It was a VP building. Came with detailed instructions. Repeatedly talked about not having an air gap between the tin and the insulation wrap. This would create a place for condensation. The insulation needed to be in contact with the tin.

I suppose that same philosophy applies here??

In my world stripping is only done to "level" out an out of shape roof.

 

[East30]

Every contractor and supplier I talked to said to nail 1x4s over the existing shingles and screw the panels to those. None mentioned paper.

The only alternative was a full tear off down to the decking, replace/repair any bad boards, then apply paper, then the 1x4s and panels.

Never done it myself, but have seen it done numerous times this way.

 

[fruitcakesa]

Every contractor and supplier I talked to said to nail 1x4s over the existing shingles and screw the panels to those. None mentioned paper.

The only alternative was a full tear off down to the decking, replace/repair any bad boards, then apply paper, then the 1x4s and panels.

I have used this method on past renovations and also new on my shop minus the shingles.ie: plywood, 30# felt, strapping, metal roof. No moisture issues in 19 years.

 

[jaxs]

As long as it's not my roof I don't see any reason to dwell on it. Just last week I watched 2 "professional"landscape workers spend over 3 hours string trimming the property next door that I've done countless times by myself in 2 hours(often when temperature was 90f +). If the new property owner ask's for my opinion I'll recommend he fire his lawn care company. Otherwise if he's happy I'm happy.

 

[ovrszd]

As long as it's not my roof I don't see any reason to dwell on it. Just last week I watched 2 "professional"landscape workers spend over 3 hours string trimming the property next door that I've done countless times by myself in 2 hours(often when temperature was 90f +). If the new property owner ask's for my opinion I'll recommend he fire his lawn care company. Otherwise if he's happy I'm happy.

So you posted to say your part in this discussion is to not dwell on it. Awesome!!! )