Pictures of aluminum edge flashing for EPDM roof?


#1

I’m trying to properly flash and gutter an EPDM roof on a wood frame house that was mis-installed the first time around; what we’ve got is a wood frame wall that goes up to meet a roof, where the only surface on the roof is an EPDM sheet, and we’ve got about three inches of excess EPDM which is overhanging down onto the very top of the wall.

A local roofer told me that what I should install aluminum flashing above the EPDM sheet, and then secure the aluminum down onto the EDPM via Mulehide tape, so that the final result would look like

—TOP—
Mulehide tape
Aluminum flashing
EPDM
Roof plywood
—BOTTOM—

In pictures:

                   -----------------
                 /    Mulehide tape |
                /   ----------------  
 --------------   /  -----------------------------
| Mulehide tape  /  | aluminum flashing           |
----------------     -------------------------    |
--------------------------------------------  |   |
EPDM EPDM EPDM EPDM EPDM EPDM EPDM EPDM     | | a |
----------------------------------------    | | l |
--------------------------------------  |   | | u |
roof plywood             roof plywood | | E | | m |
--------------------------------------  | P | | i |
                                   ---  | D | | n |
                                  |   | | M | | u |
                                  | f | |   | | m |
                                  | a | | E | |   |
                                  | s | | P | | f |
                                  | c | | D | | l |
                                  | i | | M | | a |
                                  | a | |   | | s |
                                  |   |  ___  | h |
                                  |   |       | i |
                                  | f |        \ n \
                                  | a |         \ g \
                                  | s |          \   \
                                  | c |            --- 
                                  | i |
                                  | a |
                                  |   |
                                   ---

With the gutter, it would look like:

                   -----------------
                 /    Mulehide tape |
                /   ----------------  
 --------------   /  -----------------------------
| Mulehide tape  /  | aluminum flashing           |
 ---------------     -------------------------    |
--------------------------------------------  |   |
EPDM EPDM EPDM EPDM EPDM EPDM EPDM EPDM     | | a |
----------------------------------------    | | l |
--------------------------------------  |   | | u |
roof plywood             roof plywood | | E | | m |
--------------------------------------  | P | | i |
                                   ---  | D | | n |
                                  |   | | M | | u |
                                  | f | |   | | m |
                                  | a | | E | |   |
                                  | s | | P | | f |
                                  | c | | D | | l |
                                  | i | | M | | a |
                                  | a | |   | | s |
                                  |   |  ---  | h |
                                  |   |       | i |
                                  |   |        \ n \
                                  |   |         \ g \
                                  |   |          \   \
                                  |   |            ---
                                  |   |
                                  |   |  ---                               ---
                                  |   | |   |  -------------------------  |   |
                                  |   | | g | | Leaf-Relief Leaf-Relief | | g |
                                  |   | | u |  -------------------------  | u |
                                  |   | | t |                             | t |
                                  |   | | t |                             | t |
                                  |   | | e |                             | e |
                                  |   | | r |                             | r |
                                  |   | |   |                            /   /
                                  |   | |   |                           /   /
                                  |   | |   |                          /   /
                                  |   | |   |                         /   /
                                  |   | |   |                        /   / 
                                  | f | |   |                       /   /
                                  | a | |    ----------------------    /
                                  | s | |     gutter gutter gutter    /
                                  | c |  -----------------------------
                                  | i | 
                                  | a | 
                                  |   | 
                                   --- 

Is that correct?

I googled and googled and googled for this sort of thing, but I couldn’t find an online picture, so if anyone knows of some good pictures showing the correct installation method, I’d be most grateful.

Also, if the EPDM isn’t glued to the edge of the roof, then I’m thinking about gently pulling it back and placing a second piece of flashing beneath it, so that I’d have something like:

—TOP—
Mulehide tape
aluminum flashing
EPDM
Mulehide tape and/or flat-head nail
aluminum flashing
Roof plywood
—BOTTOM—

In pictures:

                   -----------------
                 /    Mulehide tape |
                /   ----------------  
 --------------   /  -----------------------------------
| Mulehide tape  /  | aluminum flashing                 |
 ---------------     -------------------------------    |
--------------------------------------------------  |   |
 EPDM EPDM EPDM EPDM EPDM EPDM EPDM EPDM EPDM     | | a |
----------------------------------------------    | | l |
                   -----------------          |   | | u |
                 /    ??? nail ???  |         | E | | m |
                /   ----------------          | P | | i |
 --------------   /  -----------------------  | D | | n |
| Mulehide tape  /  | aluminum flashing     | | M | | u |
 ---------------     -------------------    | |   | | m |
--------------------------------------  |   | | E | |   |
roof plywood             roof plywood | | a | | P | | f |
--------------------------------------  | l | | D | | l |
                                   ---  | u | | M | | a |
                                  |   | | m | |   | | s |
                                  | f | | i | | E | | h |
                                  | a | | n | | P | | i |
                                  | s | | u | | D | | n |
                                  | c | | m | | M | | g |
                                  | i | |   | |   | |   |
                                  | a | | f |  ---  |   |
                                  |   | | l |       |   |
                                  |   | | a |       |   |
                                  |   | | s |       |   |
                                  |   | | h |        \   \
                                  |   | | i |         \   \
                                  |   | | n |          \   \
                                  |   | | g |            ---
                                  |   | |   |
                                  |   | |   |  ---                               ---
                                  |   | |   | |   |  -------------------------  |   |
                                  |   | |   | | g | | Leaf-Relief Leaf-Relief | | g |
                                  |   | | a | | u |  -------------------------  | u |
                                  |   | | l | | t |                             | t |
                                  |   | | u | | t |                             | t |
                                  |   | | m | | e |                             | e |
                                  |   | | i | | r |                             | r |
                                  |   | | n | |   |                            /   /
                                  |   | | u | |   |                           /   /
                                  |   | | m | |   |                          /   /
                                  |   | |   | |   |                         /   /
                                  |   | | f | |   |                        /   / 
                                  |   | | l | |   |                       /   /
                                  |   | | a | |    ----------------------    /
                                  |   | | s | |     gutter gutter gutter    /
                                  |   | | h |  -----------------------------
                                  |   | | i |
                                  | f |  \ n \
                                  | a |   \ g \
                                  | s |    \   \
                                  | c |      --- 
                                  | i | 
                                  | a | 
                                  |   | 
                                   --- 

Is that sort of thing okay, or is it like too much overkill?

Thanks for any suggestions you might have!


#2

ny pressure sensetive 5 or 6" tape(all epdm manufacturers make it)is put down after laying a coat of quikprime on the epdm and the flashing metal. all nails must be more than 2" from the edge of the tape.now bear in mind a gallon of primer is about $35.00 and a roll(100 ft)of covertape is about $130.00 a roll


#3

you’re glueing the rubber to decking? for the most part it looked right, except there should be insulation and a wood nailer. I think it may be fine to glue to some decking, depending on what is, meaning plywood I guess. I don’t use any of the terms you are using. The “aluminum flashing” is usually referred to as cleat metal, the mulehide I refer to as “cover tape” or “bar anchor tape.” Mulehide flashing is not a technical term, Mulehide is a brand name and they make a bunch of different kinds of flashings for the rubber system.


#4

So it’s okay to nail on top of the aluminum flashing, and down through the EPDM, and then into the plywood, so long as afterwards you have at least 2" of tape covering the nail head?

Meaning that when you cover the aluminum flashing with the tape, the edge of the tape extends at least two more inches in either direction beyond where the nail is?


#5

no…2 things are wrong. you need to use galvanized drip edge not aluminum. the aluminum will pull away from the edge over time as the rubber pulls on it. also the drip edge needs to be put down with exterior grade screws not nails, as the nails have a tendency to work out over time. clean the area with gasoline and a rag, then prime. then tape (you need a small rubber roller to roll down the tape to get proper adhere). you must run this roller across the tape, not with the tape as this will cause bubbles to get trapped. the cover tape comes in 150 foot rolls.


#6

Im with roofboss on this one.


#7

im with roofboss too. I’ve done a lot of jobs that were inspected by various manufacturers Marshall and I’ve never put screws through cleat metal. I’m not saying you can’t because I don’t know. What I DO know is that Firestone, Genflex, Carlisle and many others have come to inspect jobs with wood nailers (4 inch strips of plywood nailed to the perimeter) and they all passed. Additionally, I worked for a company that was pretty established and did all commercial, so I’ve ripped off their rubber roofs and redone them 25 years later and not one nail backed out.


#8

Let’s just make sure we know that the cleat is a piece of under-metal that is secured either over the edge and secured, or on the face and secured to hold the outside edge of the perimeter flashing to the building. Cleat metal is usually face-nailed and the flashing snapped onto it and secured on the roof, then stripped in.


#9

Is the thinking that long term, the Mulehide tape will adhere better to the galvanized than to aluminum?

Also, if I go with galvanized, then what kind of screws would I use? Stainless?

Finally, is it okay if galvanized touches an aluminum gutter? Or over the years, will there be a possible galvanized-to-aluminum reaction?


#10

If anyone’s curious, I just talked to Dave Schick, of Mulehide tech support.

His recommendations: Solvent on the metal [use an acetone; mineral spirits are too oily], then about fifteen minutes to dry, then tape primer on the metal and the EPDM [applied with a gentle but firm stroke from something like a Scotch Bright pad - streaking indicates that there is still dirt on the surface, so all streaks must be washed away], then about fifteen minutes to dry, then a cured cover tape [applied with a steel roller to get out the bubbles, but do NOT stretch the tape, because it’s like a rubber band and will eventually contract], then black lap sealant [basically a caulk] on both the EPDM edge of the tape and the metal edge of the tape [he said only the metal edge sealant is code-necessary, but that it’s good to put it on the EPDM edge as well].

Also, he recommends galvanized metal over aluminum [aluminum expands and contracts more than galvanized?], and good screws [stainless].

Finally, he vetoed the idea of the second “under” flashing, because he said that that would end up being so much material that it would create a water dam up top.

Well, it’s off to ABC Supply for me.


#11

Taking bets, RB?


#12

3-2 odds it leaks.at least he contacted a mfr rep.other wise it would be 4-1


#13

I am not a roofing pro but I was researching the same issue and here are some links that helped me:

roofingproductsint.com/rpihandbook.pdf

technicaldatabase.fsbp.com/techn … /roofedge/

Also I bought a small (10x20 ft) piece of epdm from a place called
flatroofsolutions.com and they sent me a video that showed how to
apply it. Including the edge detail that you are asking about.

Good luck


#14

i gotta check this site out


#15

We just use different terminology here. what you’re calling cleat metal I call hook strip. I call the metal on the roof surface either cleat, because it cleats the rubber so wind cannot get under, or I just call it edge metal. When I order stock Im not misunderstood.


#16

Okay, we’re going with galvanized drip edge, stainless screws, and Mulehide cured covering tap with Mulehide primer.

It’s the official Mulehide recommendation [and they own this market] - anything else I can do to lower those odds down from 3-2?

Thanks.


#17

Mulehide owns what market? If you are talking about EPDM, I’d say Carlisle is the leader and most respected in the market. Others may disagree, but Carlisle Syntec Systems has been manufacturing EPDM roofing for over 40 years now.


#18

wouldnt use mulehide if it was the only epdm available. they wish they owned the market. i install about a half million squares of epdm a yr and im tellin you its garbage.look into versico or manville cheap yet effective


#19

So to make sure we have it straight, Carlisle and Firestone make EPDM sheet, let others private label it, and then the various brands make their own washes, primers, flashings, accessories, tapes, and adhesives?

I have used Mulehide, and found it to be nothing special. No failures, but nothing special.


#20

I’m not sure if they make their own flashings, splice washes, glues, etc., or not. But yes, my understanding is that only Firestone and Carlisle make the rolls of EPDM anymore. However, now that I’ve stated it, I’m sure someone will come up with a third manufacturer.