Can You Roof in the Rain?

Nature is unpredictable at its best, especially if you are in Vancouver. You can expect ten days of rain in Spring, Summer, and Fall. Nature is unpredictable at its best, especially if you are in British Columbia.

You can expect a lot of rain in Spring, Summer, and Fall as you go north. However, while Professionals like our White Rock roofers take every step to avoid the rain, unexpected rainstorms still happen. 

But, can roofers work in the rain? A short answer, No!

It is neither safe nor ideal to install a roof in the rain. Not only does it create a hazardous work environment for the roofers, but it also affects the quality of your roof. 

Considering the price of a new roof ($5000 – $45000), it is reasonable that homeowners worry about their investment. However, it is safer for all the parties involved to wait out the rain and halt the work. 

This article takes you through why you shouldn’t install a roof in the rain and the steps to take if it rains during a roof installation. 

Can You do Roofing in the Rain?

The roof protects not only the home from elements, including sun, rain, and wind but also provides shelter. 

When it comes to roofing, it is a time-sensitive job, be it a new installation or repair work. Our Experienced roofers (like our Coquitlam roofers) constantly monitor the weather for the best time to install roofs. They do not install new roofs even in inclement weather. 

Rain can cause many issues during installation and after if you are not careful. So, even if you are tempted to complete the installation no matter the weather, it may not be the best idea. 

Here are a few reasons you should not install or repair new roofs in the rain. 

Reason 1: It Creates a Safety Issue

Safety is critical when it comes to working 20 or 30 ft high up on a roof. And that’s not possible when it’s raining. This is because you do not have enough traction in wet conditions, leading to slips and falls. 

Furthermore, shingles tend to get slippery in the rain. No matter your safety procedures, a slick roof can turn deadly and put the entire roofing crew at risk. 

And if there’s lightning, the threat increases. Depending on how high the crew is, they may be the tallest objects and can get exposed. So, it’s not worth the risks, be it a drizzle or a cloudburst. 

Furthermore, you could be liable for any injuries that happen on your property if the roofing company doesn’t carry a proper license. 

Reason 2: It Puts Your Home at Risk of Leaks

Be it a new installation or a repair job, the roofing deck is exposed to elements for the time period. For example, a deck that is exposed to the rain can become damaged after prolonged exposure to rain resulting in mold and mildew growth. In due course, the wood warps and changes shape, leading to roof failure. 

Not just rain but also condensation, dew, and even high humidity can cause the roofing materials to warp. Swelled or wrinkled materials can affect the quality of the roof in due course, leading to distorted roofs and leaks. 

Reason 3: Shingles Do Not Adhere to a Wet Roof

Continuous exposure to water will interfere with the shingles installation process and, in all likelihood, will result in fungal and mold growth within the roof interiors such as barriers, OBS boards, felts, etc., and ultimately the roof itself. This is because roofing materials such as shingles are not designed to be installed under conditions such as high humidity, let alone rain. 

Furthermore, the shingles may not adhere properly and can slip off once fastened since it is being laid under damp conditions. If not, the moisture trapped underneath the shingles can cause the shingles to buckle or wrinkle. 

Reason 4: It Can Void Your Warranty

Most roofing materials manufacturers provide warranties for the quality of the products. And improper installation can void the warranties. 

To claim the warranty, the roofing should be done as advised and follow a specific set of instructions, including weather. This can help prevent installation problems and minimize damage. 

Even if your roofing contractor agrees to work in the rain, your warranty would still be void. 

What if it Rains In The Middle Of The Roofing Project?

There’s nothing much you can do when it rains while roofing. So all work is halted until the rain stops and clears up. 

Like any other outdoor project, you have to cover the roof with a tarp to prevent water from damaging the roof interiors. While it is not ideal, it is not the end of the world. It gives a temporary solution until the rain clears up. However, if the storm is fast-moving, you will not have time to do anything. 

Our Burnaby roofers, who have years of experience to back them, generally have blue tarps and 2x4s (to secure them) to cover the exposed areas in case of rain. Of course, it doesn’t help that Burnaby has a long rainy season, the better part of 6 months. However, it may not be enough. Chances are that the roof will get wet in the time it takes to secure the tarps. 

How Long Does It Take a Roof to Dry After Rain?

The rule of thumb is to give two days of drying time before continuing with the roof work. However, it may take longer if the roof hasn’t dried yet or if the rain is particularly heavy. In this case, the contractor may allow a third day to let things dry out completely before starting work again. 

The only thing you could do when this happens is to be patient and wait for the weather to clear up. It is best when the new roof is not installed on wet materials. Dampness can warp the wood, resulting in mold and also compromise the strength of the roof. 

What If I have to Install a Roof in the Rain?

It is not always possible to wait out the rain, especially if you live in areas where it rains out of nowhere. You will have to work around the weather, which is also not ideal. 

In any case, you should have a recovery plan to ensure the continuity of the installation, your safety, and the integrity of the shingles (for warranty). 

Here are a few things you can do to ensure that both the crew and the materials are protected:

  • Keep an eye on the weather. While it is easy to check the weather, learn to understand the changes so that you and your crew are safe. 
  • If you are likely to run into inclement weather, work in sections. It is easier to cover the exposed regions when the rain hits and hence less likely to have water damage. 
  • Ensure that you have an ample number of tarps to cover the exposed area. 
  • Depending on the local laws, you may violate the building code if you continue working in the rain. And you may have to redo the work again to pass inspection. 

How Does Rain Affect Roofing Materials?

In addition to creating hazardous working conditions for skilled experts like our Delta roofers, rain also impacts the integrity of the roofing materials. Furthermore, rain can make it difficult for the shingles to be installed. Any moisture trapped underneath the shingles can cause the wood to rot and grow mold. Additionally, the water will render the glue ineffective and prevent the shingles from adhering to the roof.

Find out more Why Installing Metal Roofing Is a Good Idea for your next roofing project.

As far as prevention goes, the best option is to wait for the rain to pass before starting the work on the shingles. Then, tarp the exposed area and protect the wood and roof decking from water damage. 

If you want the roofing done right, avoid installation work during rains. 


Installing a new roof is a significant investment that takes time, money, and effort to plan and execute. However, it doesn’t mean you have to continue the work in inclement weather like rain. A long-lasting, structurally strong roof, should be installed under the right conditions; rain is not ideal. 

In many states, installing roofs in the rain is considered to be violating building codes. And hence most contractors won’t install since they caIn many states, installing roofs in the rain is considered to be violating building codes. And hence most professionals like our Maple Ridge roofers won’t install since they cannot guarantee quality work in bad weather. 

The best option is to wait out the rain until the site is safe for the installation crew. 

Table of Contents