Guest User
11/23/2004
I had a standing seam galvanized metal roof installed at a lake house in Maine about 20 years ago. Rust is starting to show in various places. What paints and procedures would take care of the problem?
Guest User
11/23/2004
Fortunately, metal roofing has come a long way in that 20 years. However, if you do a Google search for "metal roof restoration," you will find a number of options.
Guest User
11/23/2004
I had a metal roof installed 3 years ago. Recently I noticed a few water drips coming from under the eve. It seems that the water is coming from above the old asphalt roofing that was left on place, as the metal roofing was installed on top of the old roofing. I noticed that all the screws are in place. could the cilicon that was used to seal the the pieces of the metals started to break apart? What is the best cilicon sealant to use to patch it back up. Thanks a lot!
Allan Reid
Dura-Loc Roofing Systems, Inc.
11/24/2004
This may be a result of condensation given the time of the year however I am not aware of your location. I would be wary of a roof that used Silicone. Most residential roof systems are designed to only require sealant at flashings and then the common product is a Butyl based sealant that is compatible to most paint surfaces. I would suggest contacting the original contractor and get him out there to have a look and ask him what type of sealant was used. It should then be completely removed and replaced with proper sealant.
Guest User
11/24/2004
Allen, thanks for responding. Are you saying that in metal roofing silicon calking must not be used except on flashing? Thanks again. Mack
Allan Reid
Dura-Loc Roofing Systems, Inc.
11/25/2004
I am saying that certain silicone sealant has oils in it that will attack a painted surface be it on metal or concrete and typically they do not perform well in the sunlight and should generally not be used on either the roof material or flashings. A Butyl based caulking is compatible with paited metal surfaces and is designed to remain flexible. Remember flashings are used where there is a change in materials and structure and must be designed to flex. Take a two story house with a basement, full hight plumbing stack and chimney. You could have the pipe and the brick chimney heating up and expanding while it is cold outside while the roof structure shrinks when it gets cold. Back to your question, it would appear as if they have used sealand in a lot of areas on your roof material for whatever purposes. many commercial roofing systems have splicing and other details that incorporate butyl sealing tape.
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