Flat Roof Repairs and Flashing in Greenwich
Flat Roof Repairs and flashing is the most important part of a flat roof. Most leaks are caused by roofing materials loosening from flashing. When a skylight, vent or any other object is installed on a flat roof, then flashing is the critical part.
For every roofing system, there are specific techniques how to attach the roofing materials to the flashing.
EPDM Rubber Roof Repairs and Flashing
In the case of EPDM Rubber, they try to avoid it all together of attaching to metal. Although in the past, all EPDM roofing systems did use the metal flashing to make the transition between a wall and a roof or any other object.
This method caused so much roof failures that most roofing contractors that install EPDM will avoid attaching to metal at all cost, but instead, run the EPDM up the wall behind the siding or up a curb
This EPDM roof shows where the EPDM is used to go up the wall under the siding, shingles, and metal edging. This is well done and works most of the time. There are areas where it’s not possible to get away from metal transitions as you can see in the image, the EPDM rubber has been attached to the metal edging. See the black strip on top of the white metal edging, that was a repair because the EPDM came loose.
In the video below I explain the importance of flashing. Most roofs problems start with flashing not done right.
TPO Roof Repairs and flashing
TPO systems have to rely on prefabricated TPO roof flashings and accessories. This technique is handy but becomes an added expense to the overall cost of the roof installation. It could also delay the completion of a roof installation if an unforeseen accessory is added during the installation. Making repairs on a TPO roof is also not that easy because special heat guns are needed to weld the materials together.
In this image, you will notice that all the skylight flashing looks uniform because prefabricated flashing was used except for the skylight far right that was installed at a later stage and there was no time to order the prefabricated flashing.
Torch Down roofing and flashing
Flat Roof Repairs and flashing with Modified Bitumen Torch Down Rubber membranes comes easy. This material can be easily attached to existing metal flashing or the material can be used as flashing like in the examples of the other roofing systems.
We have developed a technique to successfully attach the torch down membrane to any metal surface with great success. This allowed us to use existing metal flashing on an old roof, saving the cost of removing siding. This technique is especially useful when it comes to metal drip edges making it by far a better system than EPDM or TPO.
Window sills are hard places to make a transition from a roof to the window sill. In this case, we installed a metal drip edge upside down and the rubber could then be attached to the metal. Unlike in the case of EPDM or TPO, this would have been a much bigger problem and very costly.
The same goes for attaching to drains and scuppers. We remove all the old roofing materials from the flashing and attach the rubber to that.
The video below explains how the roof was not properly attached to the flashing. This is a common problem with most roofing contractors.
Metal Flashing and Roof Repairs
In the illustration shows how the copper flashing works.The benefit of having metal flashing is that the corners are solid and welded. The rubber material is bonded to the metal and lies flat. This method of flashing is by far the best for any flat roof. When siding is replaced, the roofing membrane will not be disturbed and when a flat roof repair or replacement is needed, the siding will not be disturbed.
When roofing membrane becomes flashing
In the illustration, you will notice the rubber membrane making the corner. This is where the roof is at its most vulnerable. The ultraviolets are concentrated in the corner and will cause degradation. There are times where snow shovels have poked through these corners.
When it comes to repair or replace the roof, the siding has to be removed, or when the siding has to be removed, the roof is in jeopardy.
This video is a demonstration how a corner flashing is torched and sealed on an air conditioner curb
Flashing reused only in Torch Down Roofing
The old roofing was completely removed on this commercial roof. The skylight flashing was carefully cleaned for reuse. The reuse of skylight flashing as in the image is only possible with a Torch Down Roofing System. We have developed a technique many years ago to attach a torch down roofing membrane to any metal flashing regardless of how uneven the surface is.
Cleaning the Flashing and roof repairs
It’s time-consuming to clean the flashing from old roofing materials. This is necessary for the new rubber roof to attach to the copper flashing.
Roof and Flashing Ready
This is what it looks like after the roof and flashing have been repaired to receive a new torch down rubber roof.
What to look for before making roof repairs.
In this video below I demonstrate how flashing on a brick wall could be the cause of a leak
Flashing under a window. This old school building had new vinyl windows installed but no thought for proper flashing