From the album of Mike Hess.
Affordable Roofing received a call from a customer in Geneva, IL. that
got our name the old fashioned way — from the phonebook. There was a
ponding problem on a flat roof addition in the rear of a two-story home.
The customer described it as a mosquito breeding pond.
Looking thru the bedroom window the customer not only saw ponding water
but also moss, foliage and landscape debris. This eyesore prompted the
customer to take action to resolve this situation.
We investigated the roof and took core samples. The roof system
consisted of a wooden deck, four inches of insulation and an EPDM
membrane. The condition of the membrane was good and there were no leaks
but as happens with so many flat roofs, there was now a ponding water
issue.
We specified a system designed to help eliminate the standing water.
First we installed Firestone's
Tapered ISO 95+ polyisocyanurate (foam) insulation at a ¼” per foot
rise. Over the tapered insulation we attached a
GAF EverGard 60 Mil TPO single-ply membrane. This proven product
provides many benefits including low installed cost, heat welded seams,
white reflective color, and no liquid plasticizers.
We received a call from the homeowner a few weeks after the project had
been completed. There had been several days of heavy rain and the
customer was calling to tell us that he had stood at his bedroom window
and could see the water flowing to the gutters without any ponding
issues. He said that this was how he thought a roof should work!
File: Front of house.JPG
Front of the house in Geneva, IL
File: 2008_1206tpotapered0078.JPG
Beginning to lay in the tapered Firestone polyisocyanurate
(foam) insulation. There will be a ¼” rise per foot.
File: 2008_1206tpotapered0081.JPG
The new TPO roofing system will be installed over an
existing EPDM roof.
File: 2008_1206tpotapered0084.JPG
The tapered roofing system will channel waterflow
toward the gutters.
File: 2008_1206tpotapered0086.JPG
The tapered roofing insulation is mechanically attached
to the existing EPDM roof. Note the pitch line against the wall of the
building.
File: 2008_1206tpotapered0089.JPG
Beginning to attach the GAF EverGard 60 Mil TPO
single-ply membrane.
File: 2008_1206tpotapered0092.JPG
GAF EverGard 60 Mil TPO single-ply membrane comes in
in 5-foot width rolls.
File: 2008_1206tpotapered0096.JPG
Low-slope mechanic, Chuck Wallace, is welding the TPO
seams together.
File: 2008_1206tpotapered0100.JPG
Diagram of waterflow direction on the new tapered roof.
You can see the air welder used for attaching TPO membrane in the foreground.
File: 2008_1206tpotapered0103.JPG
Another view showing the pitchline in comparison with existing
wall.
File: 2008_1206tpotapered0107.JPG
Corners of the TPO sheets are overlapped prior to welding.
File: 2008_1206tpotapered0111.JPG
Installation finished. The TPO membrane is mechanically fastened
up underneath the shingled roof eave.
File: 2008_1206tpotapered0115.JPG
Gutter and wall detail of the finished tapered TPO roof system.
File: 2008_1206tpotapered0118.JPG
Metal edge detail of the finished tapered TPO roof system.
File: 2008_1206tpotapered0121.JPG
An existing soil pipe gets flashed with a TPO boot.
File: 2008_1206tpotapered0123.JPG
GAF EverGard 60 Mil TPO single-ply membrane has a reflectivity
of .76, making for a very cool roof!
