Roof repair 101?

[HKB3]

Ok so I am still a newbie home owner, I had a large branch fall on the roof of my garage a few weeks ago and soon after I noticed that the roof was leaking. Today I finally had a chance to remove the drywall to see where the water was coming from, there is a fist size dent in the roof (plywood). I do not have a long enough ladder to get on the roof right now( it is a two story garage) the damage is not noticeable from the ground but is around 8-10 shingle rows up from the bottom edge.
I am not really sure where to start to fix it, trying to save $$$ buy fixing it myself.
Here is a crappy iPhone pic of the damage from the inside

Any suggestions? Think I will be able to save the shingles? The garage is only 9 years old.
Thanks

 

[Gary S]

What kind of shingles do you have up there? Interlock shingles are almost impossible to patch. You replace all the shingles. Three tabs and architectural shingles can quite easily be patched by replacing the damaged ones once you fix the structural damage under them. Geting matching shingles is another challenge.

 

[HKB3]

I am 99% sure they are the 3 tab type, I have not been up on the roof since last June.

 

[WVBrady]

That looks like OSB (oriented strand board). If you cut out just the section that is damaged (from one rafter to the next), it will cause a weak spot. You need to tie it in to the rest of the OSB somehow. You could tie it in to a larger piece on the inside of the roof with screws and waterproof glue or you could use galvanized metal plates on the inside. Others may have a better way to tie them together.

Be sure to repair the builders felt underneath and use roofing cement liberally. If you have been on the roof before, you know to be careful.

 

[OldmanB]

That looks like OSB (oriented strand board). If you cut out just the section that is damaged (from one rafter to the next), it will cause a weak spot. You need to tie it in to the rest of the OSB somehow. You could tie it in to a larger piece on the inside of the roof with screws and waterproof glue or you could use galvanized metal plates on the inside. Others may have a better way to tie them together

I've used "H" clips to hook the sheets of OSB together before, they work good, and are cheap to buy.
Brian

 

[NUTTSGT]

Hard to tell how deep the dent is. If it's a severe dent, I might run a 2x4 from rafter to rafter underneath it. I'd probably pull out the damaged shingle, maybe patch in a piece of tar paper using some nails and roof cement. Then replace the shingle.

Honestly, we can give you some ideas but without being there and exactly seeing how bad the damage is,it's hard to say what it needs.

 

[RECox286]

Hopefully, the roofer left you with a bundle of extra shingles somewhere.

If not, then good luck finding a "match". The other thing is, you have to

find out if you have standard or metric shingles. It makes a difference when

patching due to the size difference, so the patch will fit right.

Good hunting

Uncle Bob

 

[mypov]

How far on centre are your roof rafters?

If you google floor repair (cutting a bad section out and replacing with a new piece) this would be a simular repair but only on the roof). That should give you an idea. Easiest to do this on top, remove a larger area than what has been damaged, cut the OSB at a nice rectangle or square then go underneath and with 2x4/6/8 whatever matches your rafters, tie in to your rafters and split the 2x??? to allow for backing (to screw or nail your new piece of roof sheeting to replace damaged area)...Don't know if that makes sense. Hard to describe, but if you google floor repair you will understand. Then replace the shingles you removed.
this is not thaat difficult, but if you are not used to roofing, shingling, using saws and other tools, it may be more than some might take on themselves. Best of luck, hope it goes well.

 

[pop pop]

If you think this is plywood and are not sure what kind of shingles you already have, and don't have a ladder long enough to reach it, you need to call a roofer and they'll take care of it. It is an insurable loss on your homeowners insurance.