Will Roof Tar Dry in the Rain?

3/15/2023

will roof tar dry in the rain Roofing tar has many uses.

This dark, oily, waterproof substance protects the roof from water, UV rays, sunlight, and other weather elements. In addition, roofing tar is often used for leaks and as an adhesive. However, it’s important to note that newly applied roof tar sets faster in some climates than in others.

How Long Does It Take Roofing Tar to Dry?

The time it takes roofing tar to dry depends on the weather. Generally, roofing tar requires at least eight hours of sunlight to dry. If the weather is humid, the drying time may take longer than it would in warm, dryer weather. Therefore, it is not recommended to apply tar while it’s raining or humid.

Tar is sensitive to temperature. Temperatures below 70°F will take longer to set, but roofing tar will become liquid in extremely high temperatures. Tar’s unique liquid/solid properties make it most suitable for flat and low-slope roofs. Alternately, using roofing tar on high, sloping roofs is not recommended because it will turn into liquid at high temperatures and slip off the roof.

Roofing Tar in Rain

But what if your roof is leaking and it’s raining outside? In that case, consider rubberized roof tar. Rubberized roof tar, or rubberized wet patch roof cement, stops leaks even in standing water. It’s an excellent option for sealing roof leaks in wet, dry, hot, and cold climates.

Selecting the right type of tar for your roof isn’t easy, and mistakes can leave you with a bigger problem than you expect. Before purchasing or using roofing tar, consult with an expert. They can evaluate your roof and provide expert recommendations that can save you time, stress, and money in the long run.

How to Apply Roof Tar

Working on the roof is hazardous; therefore, we strongly recommend hiring professional roofers. However, if you’re confident you can tackle the job, there are materials and a series of steps you need to take to do this job safely.

Before getting started, ensure you are wearing long sleeves and long pants. Also, wear hiking boots or shoes that are non-skid and have a grip. Protecting your eyes and hair by using safety goggles and a hair tie is also essential. Additionally, in case of an emergency, have a first aid kit and cold water available.

Once you have everything you need to start the project, complete the following steps in the order advised below:

Calculate the amount of tar needed – First, determine how much tar you’ll need for the project by measuring and calculating the roof’s dimensions.
Decide which tar to buy — After you know how much tar you need, decide which tar to buy. Most of the time, asphalt tar is the best option, but coal tar might be better if your roof is slanted. As we suggested earlier, it’s a good idea to consult with an expert before purchasing.

Apply base layer — Nail a coating of base on your roof to act as a buffer between the tar and the roof.
Cautiously apply tar — Pour the tar out and use a fiberglass mop to spread it. Begin in the corner of your roof. Be careful the tar doesn’t build up or clump.
Seal each layer — Spread tar paper across the top of the tar and use a mop to go over it. Then seal each layer by overlapping the tar paper. Create three layers.
Monitor the temperature — The tar kettle should always be 25 degrees below the flashpoint to prevent explosions and fires. Never put your kettle near flammable objects, including grass, wooden tools, or rags.

Professional Roofers

Applying roof tar requires a lot of preparation and skill to complete the job safely and successfully. Let a CertainTeed professional help you.

We will recommend the best roof tar for your roof and apply it safely, so you don’t have to. Contact us today.