I posted this on 7/6/06 and received one reply which altho appreciated did not help with my problem, any ideas?
I have a client with an 8 in 12-1 year old 4-Tab roof. A small bedroom with a 3 in 12 was left undone by the roofer. It had been reroofed 10 years ago. The small bedroom is roofed with a membrane, I’m not sure what it is, cream in color, not “Torch Down” and works just fine no leaks as yet however the client would like it to match the rest of the new roof. So, not wanting to put nails though this membrane it would seem that an adhesive or glue or something along that line would be appropriate. The idea of spreading Black Jack on 3 squares in July is not my idea of fun altho It would seem that it would hold it down. Anybody out there have a better solution?
Replies
could you post any pics of the 3:12 roof?
If the owner just wants it to match in color, there are many coatings that could be applied to low slope roof membranes. You need to identify the membrane first so you don' use an improper coating for the type of membrane.
All things being equal, I wouldn't recommend "gluing" shingles over another membrane.
Thank you for your replies, here's a photo from the 40s, this is the way she wants it to look. The 3 in 12 is on the lower left side. As I type I don't have a close up of the membrane. The idea is to "match" the new roof, paint or a membrane of a close color is not going to make her happy, she wants the same 4-Tab. I don't see any reason why I can't attach the same 4-Tab as the rest of the roof. There must be a glue or ? that will work between the old membrane and the new 4-Tab.
I'm going to try a product, as a test and yes in a safe place, called "Roof Patch" made by Snow Roof Systems, the reason this one caught my attention is that it's water clean up, it would seem to be safer than an oil base compound when I'm not sure what I'm dealing with. I'll get back in a few days and let you know if the membrane has melted and all is lost or if it'll "glue" down the 4-tab. I do want it to hold up and last. So, I'm still open for ideas and suggestions. Thank you again for all your help.
larry.. if it's truly a 3/12, i'd pull the membrane , do the whole roof with grace & nail the 4-tab over the grace
i wouldn't even begin to attempt to glue 4-tabs in placeMike Smith Rhode Island : Design / Build / Repair / Restore
I agree with Mike.
Strip it, Put down the sealing membrane (grace or whatever)
and reroof with the 4-tabs nailed down.
First windy day you'll get tearoff if you glue.
Great photo by the way.
Mclaren
So maybe this is a dumb question, but why NOT just nail through the membrane? You shouldn't have to worry about leaks, right? In fact, it should be marginally MORE leak-proof than conventional nailing over tar paper, which is good for a 3/12 slope. I know the general concensus is to always tear off what's under there first, but we all know that's not always necessary.
nanny... a rubber membrane will not seal around the nails.. so if there is any windblown rain that gets under the shingles and over the headlap it could find it's way thru those nailholes into the structure
the roof configuration and the prevailing stormwinds will tend to repeat this failure in the same place again and again..
with grace Ice & water or even any of the ice & water granulars , every nail is sealed as it penetrates... so the chance of windblown rain finding it's way into the structure on a repeating basis is almost nil
but hey, whadda i no ?Mike Smith Rhode Island : Design / Build / Repair / Restore
In the past year we had two projects pop up that a condition like you're describing and we solved the problem using CertainTeed FlintLastic roll roofing which is a peel and stick membrane whose top coat sheet comes in colors that will match most roof colors out there and I am sure the other major roofing manufacturers have similar peel & stick products.
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I fail to see the issue.
You're putting a new 4-tab down, right?
Over a 10 year old, very thin existing?
30# + 4-tab + nails = new industry standard roof.
No tearoff.