Roofing Question - Gambrel Roof

[jocool1585]

To the roofing experts on the forum, I'm seeking some advice on shingling a gambrel style roof. Following some unfortunate storm damage to my garage, I'm going to reshingle the whole building. My question is about the angle transitions on the gambrel roof. Over time the shingles that were right at the transition lifted and have one, by one, taken flight from the building.

What is the correct way to transition the shingles at the angle changes on this style of roof? Pictures below for some clarity on what I'm working with...

Thanks!

Tree Damage to Eave

Tree Damage to Eave

 

[sands35]

The shingles are basically glued down at the transition. Do it on a hot day so the shingle flex and don't rip.

 

[Kevin54]

They make a metal transition called "Gambrel Roof Trim" or "Gambrel Roof Flashing" for the upper portion of the roof. Your shingle will come down over the top of it, then your lower roof shingle is underneath the trim. That way you are not shortcutting it by bending a shingle.

Do a search for either term and you should be able to see how it works.

Never mind, I went and found a pic of it. On some, the bottom edge is completely curled over for strength.

 

[jocool1585]

Kevin - thanks for the insight. I figured there was a 'right way' to flash those transitions. I found an image on roofing.com that shows it in use:

The next trick will be finding this flashing product locally....

 

[Kevin54]

Kevin - thanks for the insight. I figured there was a 'right way' to flash those transitions. I found an image on roofing.com that shows it in use:

The next trick will be finding this flashing product locally....

What you are showing in that pic looks like it's a "bent on the job" pic. Most likely done by the roofing contractors using the sheetmetal brake and coil stock they use for flashing around windows and other places. The reason I say that is the bottom lip is just flat without the extra bend in it. Which there is nothing wrong with that at all. A bought piece of flashing usually have reinforcing ribs or the 108 degree bend where the material is folded back over on itself for strength and to keep people from getting cut.

If you are going to be doing your roof yourself, you may want to check with a contractor siding person to have them come and bend up the flashing for you. If not, then you'll have to buy a whole roll of coil stock, and also rent a sheetmetal brake. That's if the box store or local lumber company doesn't carry the flashing in stock.

Let us know what happens when you get to that point as I imagine there are others that have the same style of roof and may be curious as to how you got it done, or may be getting their roof done by a contractor and just want to keep an eye on whether they do it right or not.

 

[jocool1585]

Just thought I'd followup and share a photo of how the roof turned out.

 

[redgreenbluegill]

What did you end up using for the gambrel flashing? Did you bend it up yourself?