This BUR was applied during very cold weather, which should not be permitted. Clipping the leading corners on a closed-cut valley is almost never done around here, even though it is very important. Standing seam metal roofs have become more complex in recent years, with more and varied types of roof penetrations. In fact, in the earlier part of the century, coal tar roofs were often used to cool buildings by allowing the intentional ponding of water on the coal tar surface of the roof for evaporation and cooling effect. Cool Roofing and Heat Island Issues:
An unexpected heavy rain or snow, or a simple clogged drain on an overloaded roof can result in major disaster. Many years ago the common material for this was coal tar pitch, thus the name pitch pocket or pitch pan. Unfortunately this is a very common mistake. In complex or unusual projects, or where the reviewer lacks sufficient expertise to adequately review the submittals, a professional roof consultant who is knowledgeable about the particular roof system should be retained to review the submittals. Note that reinforced sheets can begin to delaminate very quickly if water gets to the scrim because of abuse or simply from wear.
That, of course, does not justify not installing a proper plumbing boot, but it does speak to the idea that selling a quality roofing job begins with educating the client about long-term roofing performance issues. He chairs the Statistics Committee, co-chairs the Codes and Standards Committee and sits on multiple task groups. Combustion vents are sometimes very tall, especially on roofs with steep pitches. Chimney Caps We design and install custom chimney caps in copper, stainless steel and black paint grip galvalume. Brought to you by Schluter Systems. Constant movement from wind and thermal expansion will grind and wear on the roof under the equipment.