On average, roofing tar will dry in 8-24 hours. Whether the tar dries on the lower or higher end of this period is dependent upon weather conditions. Damp elements, such as dew, rain, and humidity, will prolong the drying process.
Roofing tar is a solid and reliable material but will only prove effective if applied and appropriately dried. If you’re a DIY homeowner or simply interested in the process, there are several components to consider when working with roofing tar.
We’ve put together a guide covering the ins and outs of how to dry your roofing tar so that your structure has optimal protection against the elements. By the end of this article, you’ll know a roofing pro.
How Do You Know When Roofing Tar Is Dry?
First of all, how can one tell if their roofing tar is completely dry? Do you wait the allotted time, or are there clear indications to look out for? Let’s explore this topic.
Once your roofing tar has been appropriately applied, considering the necessary conditions for proper application (read on for these details), you must evaluate how your roofing tar has dried. To do so, consider the conditions under which you applied the tar.
How much moisture was present when tarring? For instance, if you live in a moderate climate and it’s not too hot, and it hasn’t rained or snowed recently, your roofing tar will likely be dry after the minimum time allotment specified on your tar’s label.
However, if your climate is on the colder side or perhaps, it’s quite humid, we recommend waiting longer than the specified time or at least towards its upper bound to be sure your tar is dry.
If you are unsure whether your roofing tar has dried properly, the best solution is to consult a professional roofer.
Advantages of a Roofing Tar
Pros of a Roofing Tar
- Durable
- Resistant to UV rays
- Waterproof
- Excellent for flat surfaces
Disadvantages of a Roofing Tar
- Needs to be applied under specific conditions
- Toxic
When to Use a Roofing Tar
Roofing tar is durable, waterproof, and UV-resistant. These properties make it a popular choice for flat roofs. A flat roof is more exposed to the elements than those on slants. Why? Because snow, rain, leaves, and the like often accumulate on flat surfaces rather than falling off slanted areas. If your roof is flat, roofing tar is a safe bet.
Further, you should only use roofing tar if your surface has been checked by a professional. There is no sense in attempting to tar a damaged roof or endangering yourself by climbing onto a weak or broken surface to complete the job.
When Not to Use a Roofing Tar
Be sure not to use roofing tar on a structurally damaged roof. Further, don’t use roofing tar to patch up damages. Some people mistakenly use tar as a quick fix for leaks. This is a short-term solution and will likely lead to a bigger problem down the line.
The Proper Conditions for Roofing Tar
Extreme temperatures are generally not the right time to apply roofing tar. Very hot summer or bitingly cold winter is not the moment to tar your roof. The optimal temperature for applying roofing tar is 70 degrees Fahrenheit or 21 degrees Celsius.
Please note, the tar can be applied at lower temperatures (down to 40 degrees Fahrenheit) but will not dry completely until it reaches 70 degrees Fahrenheit.
The general rule of thumb is that the dryer the surface, the better. Roofing tar needs to adhere effectively, and it is already a slippery material by nature. Thus, adding extra moisture to the equation will only cause trouble.
If it has rained or snowed, try to give your surface a few days to dry in the sun before tarring. If you are working in a hot climate, you may have better luck waiting for a colder day. Very hot temperatures can thin the tar too much and cause, quite literally, a hot mess. Take our word for it, cleaning up tar is no fun at all.
How to Apply a Roofing Tar
If you’re applying your roofing tar yourself, there are a few considerations to bear in mind so that it won’t cause you trouble in the long run. Follow our step-by-step guide to ensure your roofing tar is applied correctly.
Check the Roofing Area
As previously mentioned, you cannot tar a problematic surface. Be sure to check that your roof is free of structural damage before you begin. If your roof has holes, depressions, or any other signs of damage, you should call a professional.
Warm It Up
If you have the luxury of roofing in a climate with some sunshine, we recommend letting your roofing tar sit in the sun for approximately an hour. This thins the tar and will make your life a whole lot easier when applying it!
Clear Your Surface of Debris
Roofing over leaves, dust, and muck is pointless. It will leave your surface bumpy and rather unattractive. More importantly, it can affect how your tar seals. This means that your roof runs the risk of leaks and other undesirable effects.
Sweep and wash your surface before tarring. If you have washed with water, be sure to give it time to dry.
The Method
It’s best to think of the process as you would if you were mopping a floor. It would help if you always started at the opposite end of where you enter and exit; otherwise, you’ll be walking over your freshly mopped surface once you’re finished.
So, begin at the far end of your roofing area. Proceed with short and sweet strokes until you’ve covered the entire surface. Avoid clumps and attempt to coat your roof evenly.
Selecting Your Roller
The size of the roller you select depends on the size of the area you are tarring.
If you’re covering a whole roof, we recommend using a larger roller so you can finish the job in one sitting. Why? For an evenly dried roof, it’s best to tar in one go to avoid discrepancies if the weather changes. Plus, the time of day can affect how much moisture is in the air and how much the sun heats the tar. Once started, aim to finish the job as swiftly as possible.
Can You Apply Roofing Tar in the Rain?
You can apply roofing tar in the rain, but only if you use the proper type of tar; otherwise, we recommend against it.
Rubberized tar is designed to work effectively when applied in the rain, whereas traditional tar is not. Additionally, rubberized tar will only adhere properly if the surface is clean just ahead of application. Therefore, applying roofing tar in the rain is undoubtedly more complicated. If possible, avoid it.
What Can I Use Instead of Tar Paper on a Roof?
Tar paper is a heavy paper reinforced with tar used to make roofs waterproof. However, if you’re looking for an alternative to this material because it can be hard to work with, we suggest the following:
Synthetic Papers
Many manufacturers have created synthetic, polymer underlayment options. These are tear-resistant and easier to walk on while completing the roofing job. We’ve covered the difference between silicone and tar for roofs.
Self-Adhering Underlayment
This alternative is extremely thick and resistant to the elements. For these reasons, it’s gaining popularity in cold climates.
How to Make Roofing Tar Dry Faster
Unfortunately, the only factor that will speed up your roofing tar drying time is the conditions under which it was applied. It would help if you waited at least the minimum time (8 hours). If you tar your roof in a dry, rain- and the dew-free period around 70 degrees Fahrenheit, it will dry faster than otherwise.
How Do You Soften Roofing Tar?
Though most roofing tar will already be manufactured to the right consistency, you may wish to soften your tar further. Perhaps, because it’s been left open, or you’re tarring in a very cold climate.
First, warm it up to about 90- or 100-degrees Fahrenheit. Next, transfer a portion of it into a separate container. Mix in about a quarter cup of water and stir. Test a patch of tar. If it’s to your consistency liking, go ahead and get started; otherwise, add more water until you are satisfied.
Now, It’s Tarring Time
How your roofing tar dries is essential to how it works. If you’re using roofing tar, chances are you’re looking for an effective solution to keep the elements out of your building. Roofing tar is an excellent option in this case, but only if it dries properly.
Be sure your tarring surface is structurally sound and clear of debris. Check the weather in advance; noting how dry your roof will be is critical to your tarring success. And give it the right amount of time to dry!
Now that you’re an expert in the intricacies of drying roofing tar, you can complete the job with confidence. Remember always to have a buddy holding your latter on the way up. Safety First!