Aluminium parapet flashings in Omaha

New parapet flashings on an architectural home in Omaha. The Waterproofing Co was recoating the flat roof membrane, and the existing parapet cap flashings had to come off for that work. We removed them and replaced them with new 0.9 mm powder-coated aluminium flashings in Sandstone Grey, supplied by Dimond Roofing.

We started by installing internal grab flashings with concealed fixings. The new aluminium cap flashings hook onto the grab flashings, with expansion joints at every junction and corner, and along the longer runs where they were needed.

Doing it this way does three things. It lets the flashings move: aluminium expands and contracts more than steel as the temperature changes, and the grab flashings let it do that without breaking the joints. It looks better, because when you look up at the roof there are no fixings to see. And it lasts longer, because with no fixings through the face of the flashing, there's no hole to become a weak point for corrosion or failure.

It costs a bit more, but the result is much better, particularly on an architectural home like this that you want to look good and last a long time. The house is close to the ocean, which is another reason we chose aluminium.

We coordinated with The Waterproofing Co so our work and theirs lined up.

The job took a little longer than we expected because of the number of joins involved, but we wanted to get it right, so we spent the extra time to do it properly. Looking at it now, we're really pleased with how it turned out.