Important points to consider before installation (Page 2)

Bending and forming

• Expect natural patina loss at fold- this is not a flaw
• Minor flaking will be healed by exposure
• Easily workable, like all copper

Routine tasks such as bending and seaming may be performed without any special considerations, other than keeping tools clean and grease-free. Forming, folding, dressing and similiar techniques may result in minor patina flaking along the fold line, but this will not damage the overall appearance. Flaked areas and minor abrasions will eventually heal themselves with atmospheric exposure, forming a dark gray-green oxide layer.

During extreme forming, the patina may cause friction, which can be reduced by the application of a mild liquid soap or Teflon tape applied to the surfaces of press brakes and other equipment. This will leave no residue on the patina.

Protection from damage

• Storage conditions are critical- keep sheets dry at all times
• Cover as needed during installation, but never allow moisture to form condensate
• Once removed, patina can only be restored by nature
• Avoid installing in extreme weather

While rainwater and humidity are essential for the maturation of patina AFTER installation, moisture trapped between stacked EverGreen sheets or under tarps or other covers can be extremely damaging. It can even cause severe discoloration or even destruction of patina.

During installation, work crews should limit foot traffic on installed EverGreen sheets. For heavily traversed areas, the surface should be covered with plywood or another rigid material, placed across the seams. To guard against potentially damaging construction activities, EverGreen may be covered by canvas, plastic sheets, foils or other soft coverings- but only on a temporary protective basis. Covers should not be left on for extended periods, because they could trap moisture against the EverGreen sheets.

Oil, paint, mortar, runoff from cedar, rust from iron and steel, and other materials will all damage the patina layer and should be kept away. Metal shavings, nails, screws, tools, machines and overspray from masonry cleaning operations can all damage EverGreen sheets. Tapes and other adhesives cannot be removed without damaging the surface. Cleaning the EverGreen sheets should be avoided- during construction and later in routine maintenance- as it is virtually impossible to remove stains and spills without harming the crystalline patina. (It may be possible to partially clean grease or oil stains, using a combination of solvent and a bonding agent.

If EverGreen patina is damaged or removed, there is no way to restore, correct, or repair it in the field. EverGreen should generally be installed only after other roofing, plastering and painting jobs are complete.

Other elements which can damage EverGreen include sulphor compounds, lime, cedar and some organic acids. If concerned about possible detrimental effect associated with any product which may come in contact with EverGreen, contact Revere Copper Products Technical Advisors.

Runoff from higher roof sections may cause erosion of the patina (as with naturally occurring patina ) but this can be avoided with careful detailing. Similarly, care should be taken to prevent damaging runoff from EverGreen surfaces onto other materials, especially porous ones like stone. Drip edges should protrude at 2.5" over such materials.

During very wet conditions, or if snow or sub-freezing temperatures are imminent, installation should be suspended. Installing during such conditions could delay, or adversely affect, the maturation process.