Drip Edge Flashing

[Mike Birenbaum]

Aren't drip edge flashings required at almost all roofing installations - did an inspection the other day and all the houses in the track were identical???

[Jerry Peck]

What type of roof covering?

Is that concrete tile?

I have not seen a concrete tile roof installation instruction which did not specify for a drip edge flashing AND a starter strip to raise the angle of the first course of tile up. One of the options of the starter strip is a raised wood edge with a flashing/drip edge over it which extends up the roof far enough to create the proper specified slope (although I have never seen that option installed - it would cost so much more do to it that way and at the same time reduce the effectiveness of raising the first course of tile up).

[Mike Birenbaum]

Thanks Jerry - Yes, the roof is a concrete tile material

[Jerry Peck]

Mike,

Do you know the manufacturer of the tile?

Here are some installation instructions, used by most (if not all) the major tile roof manufacturers, Moderate Climates ( http://www.monierlifetile.com/technicaltools/pdf/TRI-ModerateClimate-InstallationManual0806.pdf ) scroll down to page Appendix A, page 33/92.

Other climates installation instructions are available here: MonierLifetile.com - Technical Tools: Installation Guides (http://www.monierlifetile.com/technicaltools/installation.html)

[Gunnar Alquist]

Aren't drip edge flashings required at almost all roofing installations - did an inspection the other day and all the houses in the track were identical???

Mike,

While looking at the installation guides for my area, I find that drip edge is optional in the 2002 version and apparently required in the 2006 version.

So, the question is; what year were those homes built?

[Jerry Peck]

Mike,

While looking at the installation guides for my area, I find that drip edge is optional in the 2002 version and apparently required in the 2006 version.

So, the question is; what year were those homes built?

Does it matter what year the homes were built - in the 2002 installation instructions ... does it show the raised starter course?

If so, when correcting that, drip edge metal can be installed.

[Gunnar Alquist]

Does it matter what year the homes were built - in the 2002 installation instructions ... does it show the raised starter course?.

Hmmm... It appears so. Unless I am looking at the wrong page.

[Jerry Peck]

Gunnar,

That is one option for raising the first course of tile, which I have never seen done as it is more work and costs more than installing eave closure strips (metal or EPDM) which accomplish the same thing and are installed when the tile is installed.

Do you have the page which states that the drip edge is optional?

[Michael Garrity]

The first tile is not raised,The top of the fascia is raised to be on the same plane as the top of the tile battens.The strip behind the facia should be underneath the underlayment and that is what prevents ponding behind the fascia

[Jerry Peck]

The first tile is not raised,

That is visible in the photo, yes.


The top of the fascia is raised to be on the same plane as the top of the tile battens.

That is not visible in the photo, how do you know it is?


The strip behind the facia should be underneath the underlayment and that is what prevents ponding behind the fascia

If that is the option they take, most take the other options shown on that installation instructions.

Regardless, though, the drip edge is missing.

Additionally, in looking at the photo, the tile appears to be overhanging too much.

[Michael Garrity]

I am sorry Jerry,I was referring to a typical installation and not the picture.How much should the tile overhang?Sorry for the misunderstanding.

[Jerry Peck]

I am sorry Jerry,I was referring to a typical installation and not the picture.

Man ... I was thinking you had GOOD EYES and was trying to figure out how you saw that in the photo. :D


How much should the tile overhang?Sorry for the misunderstanding.

Without looking it up, I believe the tile should overhang 2 inches. That looks more like 4"-6".

[Ron Bibler]

Required ? Good idea. Yes:D always.

Best

Ron

[Jerry Peck]

How much should the tile overhang?


Without looking it up, I believe the tile should overhang 2 inches. That looks more like 4"-6".

Michael,

My memory is 1/2"-3/4" minimum to 2" maximum, but have not yet found it.

Added with edit: From the Florida manual "Overhang shall be 3/4" to 2", depending on tile type, use of gutter, or other functional requirements."

[A.D. Miller]

http://www.monierlifetile.com/technicaltools/pdf/26RaisedFasciaAlternative.pdf

[Michael Garrity]

Thanks for the link

"The key element of this alternate detail is that the contractor may now offer the advantage of using a ventilated eave riser metal that provides the improved air intake that helps drive the Energy Efficient Roof system."

The ventilation system will only work if the tile battens are raised of the roof deck.not the way it's shown in the picture

[Gunnar Alquist]

Do you have the page which states that the drip edge is optional?

JP,

I thought I did. Must have copied the wrong photo. This is from the 2002 TRI

[Jerry Peck]

Gunnar,

Thanks.

[Trent Tarter]

In my area it's not required as long as the shingles overhang the fascia. I think it should be required, but it's not in my neck of the woods. Most every home I inspect has it installed, but some of the cheaper builders are not installing it on their homes.

[Jerry McCarthy]

Helpful diagrams on drip edge and "other" flashing.

[Jerry Peck]

Helpful diagrams on drip edge

In some parts of this country the drip edge along the eave overhang must be over the underlayment dry-in to keep the edge down during high wind events. The drip edge may be set in plastic roof cement or sealed over with plastic roof cement, both of which serve to keep water from getting under the drip edge along the eave overhang.

In those areas, installing as shown would simply result in the wind getting underneath the underlayment dry-in and peeling the roof covering back, kind of like like peeling a banana break it loose at the end and it just peels right back.

Your second photo shows it under but with no plastic roof cement to seal it - that is a no-no.

[Michael Garrity]

www.gaf.com

There is a system for everything.Always check with the manufacturer if your not sure