Is it dangerous if there are small cracks forming on my ceiling

If your house is falling apart over things like that...it had far bigger and more serious problems before they did the roof.

Seriously.....playful kids put more stress on a deck than a FULL pack of shigles dropped from 6 feet would do...much less a 1/3 pack from three feet. I sit in front of a bank of computers for a living....I could thrown a 1/3 pack of shungles well over 15 feet, and I'm 50.

I think you are worrying about nothing...or just noticing real issues that have been forming over years before now that have been ignored.

They could all jump up and down on the roof without hurting anything unless there is pre-existing structural damage that needed repair.

Disagree Smoothy. A bundle of shingles dropped on the roof will crack the ceiling. The roofer knows this, I'd make him come back and fix it.

Need to read the rest of what I posted....it was reffering to the deck part as posted, maybe you missed the part I was reffering to.....1/3 pack shingles tossed a few feet on a roof might make a lot of noise but not do heavy damage. I weigh 220 lbs and I've been running across roofs a lot of years (not as a roofer) never had a roof ( or sheetrock or plaster ceiling)crack from it. And no unless its wet or slippery I don't step gently.

I asked my Brother who was a roofing supervisor for a number of years about that too..

Maybe its just that roofs are build stronger in my part of the country to handle snow.

I'm really concerned about the condition of her decks if they are coming loose as easy as she said. That can be a very dangerous condition.

The shingles weren't dropped on the deck. All three decks have recently come loose. My ceiling plaster recently cracked and my chandiliers are coming loose. This all happened after the roofers repeatedly tossed these 100 lbs of shingles over and over on my roof making my entire house shake each time. My main concern is safety. If I have minor cracks extending the width of my house on the plaster ceiling should I be worried? PS, kids playing on the deck never came close to the violence done by these roofers. You'd have to have been there. It was like repeated earthquakes. Thanks for all your responses. (they were standing when they threw the packs around, how high the shingle packs fell from each time is a guess.)

Full packs of shingles don't weigh 100 lbs.... not even the best grade Architectual ones....I've hauled too many of them before.

Believe what you want....but a skinny 10 year thats jumping can fold a steel Queen size bedframe in half. A couple of them will do more damage to a deck than roofers doing their normal work will including the supplies.

If your decks are coming loose they are either extremely old or improperly built. Code (at least where I live in Virginia) has required they be bolted...and not just screwed or nailed THROUGH the sill plate of the house for a fair number of years now. THey should easily support the weight of over a DOZEN full grown adults....or more depending on the size of the deck.

And just because its not 20 years old...doesn't mean it was built to code....there have been many build in recent years in my area that had to be torn down and re-done when it was discovered they were unsafe, some less than 5 years old. A few only a year old.

If a heavy snowfall will put several TONS of weight on the roof depending on a number of factors without the house collapsing, a few packs of shingles aren't going to hurt it.

Houses walls will crack....thats life because the materials aren't flexible. What matters is the size of the cracks.

Simple cracks that are tight are nothing to worry about....however WIDE cracks with gaps that you can easily measure ARE a cause of concern.

I've never seen a house with plastered walls and ceiling that didn't have cracks somewhere.... Same with houses with sheetrock walls.

Someone walking heavily across a roof will sound unsettling. I've had a raccon jump out of a tree onto mine and run across it.....that was loud enough to wake me up. Yet my roof at one time had THREE layers of shingles (yes a violation of code the inspectore missed....AND weathered more than a decade of WInter snowfalls on top of that....

If you see my point....houses are more resilient than you might think. Wood frame houses as most are built are particularly so.

Glad to hear that the simple cracks that are tight are not dangerous. I appreciate that. As far as my house shaking, you'd have to have been there. It was like an earthquake but I'm glad to hear the weight of the shingles won't harm my roof. It wasn't just the weight it was that the weight was consentrated in a small area when tossed like the weight of a tree limb falling on my house if you know what I mean. But I am going to take your word that it didn't harm anything. Thanks again, I mean that. Also, I'm sure the deck was not set up well and the heat must have had a factor because they all decided to slant and pull away from my house within the same week. Go figure?

I'd recomend having a pro check those decks out.....you don't want them collapsing when someone or a group are on them. From your description I have a very real concern about them. Leaning or pulled away from the house a visible ammount is a cause for concern.

If only for your own peace of mind. They shouldn't be pulling away or leaning....or moving for that matter.

I'd be concerned about the total weight of the new shingles on the roof. How many layers are there now? Roofers have been known to lie about how many you have to keep the quote down and not have to strip old layers off.
If your roof is actually spreading and pushing the tops of the top walls outward, that could loosen decks, not weight slamming down.
Also, what is your top floor (attic) like? Are there collar ties (ceiling joists tying the rafters together)? Or trusses? Nothing but rafters?

Two layers is safe and legal......Three is a whole different thing, my house had three layers at least 15 years before it was discovered, had issues with the gutters but nothing else detectible. The Home inspector missed it when I bought the house. I discovered it replacing an attic vent 10 years after I bought the house. Its since been stripped off and re-shingled. Walls aren't pushing out because first of how houses are built.....the roof isn't part of the walls...it sits on top, and then all but the older decks, they are required by code to be through bolted and not nailed or lag bolted to the sill plate...which is what the entire house sits on and rests on the foundation. Decks aren't attached to the walls literally.