Guest User
8/24/2004
I have a metal roof on a house that I have just purchased. However, I was informed at the closing that the roof which was supposed to have been repaired was not. The house has a membrane roof which lasted approx. 3 yrs and then a raffter roof system with asphalt shingles was built over top of the membrane roof. Then a metal roof was installed over the shingles. The metal was screwed to perlins but there was no ridge vent and no soffit vent. There is a moisture problem inside What should I do? I planed to remove the metal roof and strap the roof vertically with 2x4 and then horizontally with 2x4 cover them with 1/2" styrofoam and then new metal. Does that sound right. Thank You.
Allan Reid
Dura-Loc Roofing Systems, Inc.
8/24/2004
This is a complex question and needs more information to answer correctly. I would be concerned asto where the moisture under the metal roof is coming from. What climate are you in and is there any insulation in the original membrene roof assembly? Is the ceiling vaulted or does it have an attic? Frankly I would be concerned enough to to remove all the existing roof material down to the original deck to get the weight off it. Depending on the type of metal roof system you have you should be able to remove and reuse it but make sure you map it out and number them. If it is a vaulted ceiling with little insulation, I would consider strapping the roof vertically over the rafters with a 2x6 and then have insulation foamed in place. Then install a reinforced underlayment and strap the roof horizontally to receive the metal. Then ventilate the eaves and ridge under the metal.
Guest User
8/24/2004
What is the best way to insulate direct contact with metal or air space between metal and insulation? The moisture problem is only in the spring or showes only in the spring. Does that or could that be a ventalation problem with the other two roof systems?
Guest User
8/24/2004
The climate is the U.P. of Michigan very cold, the roof pitch is 2-12 or 2.5-12+-. There are vaulted ceilings and the age of the original roof leads me to beleiev that there is prob. very little insulation. The metal roof is approx. 16 Yrs.old according to the preveous owners. The roof has a 33' slope on one side and the opposite side is 45' long. I plan to break both sides up into 3 sections to make it more manageble and endroute the metal expansion issues.
Guest User
8/26/2004
Condensation occurs when warm moist air hits a cool surface. This is not a "metal roof problem." I have seen the same thing occur regardless of product type. There are two primary ways to guard against this. 1) A vapor barrier behind the ceiling drywall which prevents humidity inside the home from escaping into the attic. 2) A vented airspace which circulates air across the bottom side of the roof deck. Ideally, this consists of complete soffit and ridge vents. I am still not sure what signs you have had of a moisture problem inside the home. There is a chance that you simply are generating too much moisture inside the home. Things like improperly vented exhaust fans and clothes dryers are a problem. "Ventless" wood stoves also generate a huge amount of moisture. Damp basements and crawlspaces can be a problem. In our search of energy efficiency, we have made homes so tight that they no longer "breathe." Unless we make sure that all moisture sources inside the home are vented to the outside, an unwanted moisture problem can occur.
Guest User
10/11/2004
I am the owner of a 1 year home (actually a recently restored historic home with a new addition), built 1.5 years ago. It has a vaulted ceiling on the second floor in the new addition, and we have been seeing yellow stains on the inside walls along the exterior. I called the builder who said it was due to moisture and there was nothing he could do about it. Clearly this is a serious problem. Where can I find an expert on this that can tell me how to fix it? Thanks
Guest User
10/12/2004
If you know the details of your exact construction in this air -- specifically regarding vapor barrier, insulation, airspace, decking, underlayment and roofing, give me a call and we can talk through it. Hopefully, I will have some ideas to share. Todd Miller 1-800-543-8938
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