08-11-2015, 05:54 AM
I've been a bit busy and have just come back to see what replies I've gotten.
I wanted to get some down spout screens installed and my catchment tank vacuumed before Hilda comes to visit.
By everything right and proper, we should have no more leaves and other odds and ends going into our tank.
@ Tink
The black areas do not seem to be actual corrosion.
The surface is smooth, hard and covered by a very thin layer of a dusty type substance.
I think it is likely to be the primer coating under the original paint of the panels.
The only actual corrosion seems to be the lightly rusted areas along the bottom edges of the panels where they were cut to fit.
The raw edges were undoubtedly not sealed from the weather.
I do not trust automotive finishes to do a proper job for a potable water collection surface.
Nor do I trust the MSDS's to give the proper information needed to identify it as suitable for that use.
@ Bullwinkle
Yep I agree, an elastomeric type coating is the way to go if it has certifications for catchment system use.
I'm still partial to GAF's TOPCOAT Membrane WOB.
There are certified installers for it in Honolulu, but no where else that I can find in Hawaii.
I wonder if they might be a source to obtain the coating.
If not, there is probably a source in California convenient to Matson's facilities that could ship it here.
A quick and dirty calculation that may have errors gives me 2500sqft roof, not considering slope.
With 1 to 1.75 gal / 100sqft at 12.5#/gal gives 5 to 10 65# 5 gal buckets making a 350 to 650# shipment.
I think it is doable.
I still haven't checked on the cost of the coating and comparing it to the cost of a new roof.
Nor have I looked at alternative coatings yet.
We're a long way from making a decision on this.
@ EightFingers
This is the original roof from when the previous owner had the house built.
The panels are probably the cheapest the contractor could get from HD with no concern for longevity.
I'm convinced the finish is degrading, and want to get it refinished before extensive corrosion sets in.
I might add that I walked the roof with the home inspector about a year and a half ago.
He said that the roof's condition was not out of line for its age, but the rusty edges would need attention before the rust got too bad.
I wanted to get some down spout screens installed and my catchment tank vacuumed before Hilda comes to visit.
By everything right and proper, we should have no more leaves and other odds and ends going into our tank.
@ Tink
The black areas do not seem to be actual corrosion.
The surface is smooth, hard and covered by a very thin layer of a dusty type substance.
I think it is likely to be the primer coating under the original paint of the panels.
The only actual corrosion seems to be the lightly rusted areas along the bottom edges of the panels where they were cut to fit.
The raw edges were undoubtedly not sealed from the weather.
I do not trust automotive finishes to do a proper job for a potable water collection surface.
Nor do I trust the MSDS's to give the proper information needed to identify it as suitable for that use.
@ Bullwinkle
Yep I agree, an elastomeric type coating is the way to go if it has certifications for catchment system use.
I'm still partial to GAF's TOPCOAT Membrane WOB.
There are certified installers for it in Honolulu, but no where else that I can find in Hawaii.
I wonder if they might be a source to obtain the coating.
If not, there is probably a source in California convenient to Matson's facilities that could ship it here.
A quick and dirty calculation that may have errors gives me 2500sqft roof, not considering slope.
With 1 to 1.75 gal / 100sqft at 12.5#/gal gives 5 to 10 65# 5 gal buckets making a 350 to 650# shipment.
I think it is doable.
I still haven't checked on the cost of the coating and comparing it to the cost of a new roof.
Nor have I looked at alternative coatings yet.
We're a long way from making a decision on this.
@ EightFingers
This is the original roof from when the previous owner had the house built.
The panels are probably the cheapest the contractor could get from HD with no concern for longevity.
I'm convinced the finish is degrading, and want to get it refinished before extensive corrosion sets in.
I might add that I walked the roof with the home inspector about a year and a half ago.
He said that the roof's condition was not out of line for its age, but the rusty edges would need attention before the rust got too bad.
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Was a Democrat until gun control became a knee jerk, then a Republican until the crazies took over, back to being a nonpartisan again.
This time, I can no longer participate in the primary.
Was a Democrat until gun control became a knee jerk, then a Republican until the crazies took over, back to being a nonpartisan again.
This time, I can no longer participate in the primary.