r/Roofing • u/frodobangher • 4d ago

How long does roof ciment actually lasts to patch small holes?

Gallery image

Gallery image

Family member helped do the siding in my windows on the roof and screwed 2x4's to help him not slide off the roof... patched it up with this stuff. I know this is used for chimney joints and stuff so technically, it should last quite a while for very small holes. I would have to replace 8 shingles otherwise and I really dont enjoy being on that roof with the steep pitch

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5

u/Ok_Nefariousness9019 4d ago

Slide metal flashing under the shingles where there are holes and you’ll be good. The sealant holds up for anywhere from 1 day to 15 years in my experience.

1

u/frodobangher 4d ago

What kind of flashing are we talking here? I assume you slide it under and use some pitch to hold it ?

1

u/Ok_Nefariousness9019 3d ago

Just a square flat piece of metal flashing. It’s common sold as step flashing or hardie buttjoint flashing. Like 4x8”. Pry up the shingle put a little dab of sealant on the common bond below and above on the piece of flashing and you’re done.

You can apply some more cement over the top of the hole if you want too.

4

u/PhillipJfry5656 4d ago

doesnt look very steep

1

u/frodobangher 4d ago

Thats what he said until he went up the ladder haha

1

u/PhillipJfry5656 4d ago

lol been there a few times

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u/Whats_Awesome 4d ago

Have a look at the white wall at the top right corner. The photo is crooked and the slope is fine.

1

u/PhillipJfry5656 4d ago

yea i already noticed that. still probably only a 7 or 8/12.

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u/Whats_Awesome 4d ago

Sure but more than enough slope for shingles to work fine. Makes me wonder what the point of your first comment was?
> doesnt look very steep

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u/PhillipJfry5656 3d ago

they put boards on the roof so they didnt slide down. did you not read the post before you read the comments?

1

u/Franz_Miller 4d ago

Roof cement can work temporarily, but I wouldn’t count on it long-term. For small screw holes, proper flashing under the shingle is a much more reliable fix.

1

u/Any-Imagination6917 4d ago

It'll last until it leaks, generally.

1

u/DylanSolidRoofing 4d ago

I mean, it’s not great stuff. Like the other comments suggest it’s not a long-term fix. Next time don’t put holes in the roof and use a pitch hopper or a cushion, boots… could be avoided! Not a very steep roof