Tag Archives: Commercial Roofing

How Much Weight Can a Concrete Roof Support?

When considering roofing materials, there are a lot of factors to take into consideration. Durability, cost, and a litany of other things can impact which material you go with for your residential or commercial roof. But weight capacity is another important one.

Some mistakenly believe that concrete roofs are endlessly sturdy, regardless of contributing factors. That is not the case. In the following article, Roofer’s Guild explores the nuances of this topic.

How Much Weight Can a Concrete Roof Support (Cover)

Key Takeaway

A concrete roof can support about 1,200 pounds per square foot. However, variables like thickness, reinforcements, and installation quality all contribute to its maximum capacity.

How Much Weight Can a Concrete Roof Hold Per Square Foot?

While the answer to this question can vary greatly on several factors within the concrete itself, a good rule of thumb is around 1,200 pounds per square foot, depending on the thickness of the concrete and whether or not it has any reinforcements.

A common mistake is that amateur roofers just assume that concrete is impossibly strong, but it has weight restrictions just like any other material.

Reinforcing the Roof

With newer installations, this is likely a common practice performed by the roofer doing the job. But in older homes, the question of weight support becomes irrelevant if it is quite old or has experienced a lot of damage.

While a complete replacement is the most ideal of scenarios, the cost of a new roof is often not so realistic.

That is where reinforcing the roof can help get a longer life out of your roof while implementing a fast, quick repair and reinforcement that will keep the structural integrity of the roof sound for some time.

Again, it is highly recommended that you get a new roof wherever you can. Still, there are a couple of ways to reinforce your roof to give it a little boost in terms of life span.

Addressing Repairs with Patching

If the deterioration or damage to your concrete roof isn’t terribly bad, it can be patched to extend its life a little longer.

But if you are implementing extensive patchwork, it is important to note that you should not assume that it can take on a proper load and will never be able to handle the maximum weight.

The condition and age of the roof are essential factors for determining the amount of weight it can support so that you or a roofing contractor can safely traverse the roof.

Strengthening Existing Trusses

This is a way to add durability to your roof. By using 2×4s, you simply combine them with any existing trusses that may be in place from one end of the structure to the next. This can allow for extra stability.

However, this is not meant to be a long-term solution if the roof is showing signs of wear and deterioration.

Exercise caution whenever getting on the roof and understand that this is just prolonging the eventual replacement of the roof entirely.

Signs That the Roof is Failing

While not every roofing structure will provide clear warning signs, the question of weight support becomes moot once the damage is obvious.

Existing damage makes traversing the roof unsafe and a serious hazard.

There are definitely a few things to keep an eye out for regarding the condition of your roof and whether or not there may be issues currently occurring.

Leaks

The biggest issue plaguing roofing systems, concrete roofs, too, is in the form of leaks. If you see multiple wet spots in your ceiling or moisture retained on the roof, it is a strong sign that the roof has a weak spot that can lead to bigger issues.

Leaks are a huge issue not only for the roofing system itself but for the structural integrity of the rest of the building.

If that water is allowed to persist, it has the chance to rot and decay wood that could provide structural support and lead to mold growth, making it a hazard to the air quality in the building.

Cracks

Cracks are a clear indication that there may be problems with your roof. This can mean that stress is being implemented onto the roof and spreading outward in other directions.

This can lead to serious problems with your concrete roof, making it structurally vulnerable and making it unsafe to be near.

Small cracks are not a terribly big idea, but calling in a proper roofing contractor to survey the scene and understand the situation will allow you to stay ahead of any potentially disastrous situations.

It is always better to exercise caution in scenarios such as these.

Other Weight Considerations for Concrete Roofs

So many factors determine “how much weight can a concrete roof support” that it isn’t a black-and-white question.

A concrete roof can safely support around 1,200 pounds (0.54 t) per square foot when completely healthy and showing no signs of wear and tear.

But that figure can drop exponentially when leaks, cracking, chipping, and other damage rears their ugly head. If you see areas of your concrete roof that look concerning, the safest bet is to avoid stepping in those areas and leave it to the professionals.

Your concrete roof can stand up to a lot and prove to be a durable choice in roofing material, but it is certainly not immune to its own issues. You can consult this roof load calculator if you are worried about snow.

Final Thoughts

A concrete roof can typically support about 1,200 pounds per square foot. However, variables like thickness, reinforcements, and the quality of installation can all alter that general threshold.

Roofing contractors and property owners can both take measures to maximize the concrete roof’s weight capacity, including performing repairs, adding reinforcements, and strengthening the trusses.

Hail Size Roof Damage Chart

When a storm rolls through your town, there are a lot of things that can do damage. Heavy winds are the usual culprit, but hail is another type of storm that can do significant damage. The most recent annual data estimates over 3,700 hail storms in the United States.

After these storms, it’s handy to have a hail size roof damage chart at your disposal, like the one below:

Hail Size Damage Chart

Key Takeaway

Any hail larger than a ½ inch can damage a roof, meaning ¾-inch to 1-inch hail (quarter size) and 1 ¾-inch to 4 ½-inch hail (golf ball size) should prompt a call to your insurance company.

Assessing Roof Hail Damage by Size

When hail grows in size, you can be concerned about things like your car or, even worse, your roof. The costs can be heavy when there is damage to your roof. Even minor damage can cost thousands of dollars, and most of us do not have that kind of money lying around.

They say they are there for us when disaster strikes, but most insurance companies will find any reason not to pay out a claim. After all, it is how they strengthen their bottom line.

When hail becomes a concern, it can help to know what size hail can damage your roof. Again, not all hail is worth worrying about, but when those bigger chunks begin to hit, you can wonder what to do. Inspecting your own roof is dangerous, and you may not know what to look for.

Most people won’t be able to manually measure hail during a storm, so you can estimate using common identifiers like “golf ball size” and “marble size.”

Understanding which hail sizes can damage your roof gives you a good idea of when to call in an inspector to check for damage on your roof. Here are a few of the most common hail sizes that damage roofs nationwide.

¼-inch Hail (Pea-sized Hail)

Milder hailstorms generally produce this size of hail, but only for a few minutes at a time before it shifts over to steadier rainfall. When dealing with this size of hail, a roof can often fair pretty well.

Use some common sense and judgment before jumping to any conclusions.If you have an older roof with existing damage, pea-sized hail could exacerbate the present damage. Be aware of the condition of your roof before judging whether it needs an inspection after a hailstorm.

½-inch Hail (Marble-sized Hail)

Marble-sized hail can also fall into the safe zone when it comes to hail, meaning it generally doesn’t cause damage to roofs that don’t already have substantial damage. 

Remember that hail is produced by updrafts of wind that shoot raindrops higher into the atmosphere. It freezes when it gets higher into the atmosphere and then falls back to Earth.

When you have more extreme winds, the hailstones will generally be larger. While the quarter-inch-sized hailstones might not be of much concern, exercise caution and common sense again.

If you have any thoughts that there might be damage to your roof, call in an inspector immediately.

¾-inch to 1-inch Hail (Dime to Quarter-sized Hail)

You should call an inspector immediately when you see hailstones larger than the ½-inch described above. Finding a reputable local roofer is a great place to start, and you also need to make sure that you place a call to your insurance agent.

Hail this size generally damages roofs in the form of dents and cracks, though in some cases, it can definitely cause greater damage.

Do not leave this unaddressed. As expensive as it can be, if you leave the damage unaddressed, it could become a more expensive, extensive, and potentially dangerous condition to live in.

In any event, you must talk to your insurance agent immediately. Knowing what your policy covers and what might be paid for can help you determine your budget and which contractor to use.

Part of the headache of dealing with damage to your roof is dealing with the insurance company; try to get that duck in a row as soon as possible.

Once hail size approaches 1 inch, you will most certainly have roofing damage of some form. It’s important to contact your insurance company as soon as possible.

1 ¾-inch to 4 ½-inch Hail (Golf Ball-sized Hail)

While not an uncommon hail-size range, golf ball-sized hail can still substantially damage your roof, car, and home. Like with dime-size hail, you should contact your insurance agent by phone to discuss your options.

Agents might send a roofer to determine the overall damage before proceeding. Your policy may cover a portion of the damage your roof sustained.

Hail can be a nasty beast, even if it only occasionally rears its ugly head. Whenever there is hail in your area, you must assess the size of the hailstones first and foremost. Under ¾-inch, you are probably fine unless your roof already has substantial damage and age.

Anything larger than 1/2 inch should prompt you to discuss the next step with your insurance agent and find a roofing contractor to inspect your roof.

The Bottom Line for Roofs With Hail Damage

Being calm and knowing the steps to take when a hailstorm hits your area can make all the difference in the world when trying to get the necessary repairs done.

The key is not to panic and not jump to conclusions. Make sure that you take all of the proper steps so that you can not only get your roof repaired but get it done in a cost-effective way.

Because hail damage leads are often hot items for roofers, cities recently hit by storms will be ripe with them. Be aware of whom you’re dealing with.

If you are unsure whether or not your roof was damaged by a hail storm, getting an inspection is the best option. Even if the hail is around 1/2 inch in size, it can exacerbate existing problems with the roofing system.

When hail is larger than 1/2 inch, including quarter and golf ball size, your roof is almost certainly in danger. The more quickly you address damage from hail storms, the less future complications arise.