You are responsible if something goes wrong.

 You have to buy the right material beforehand.

 The hours you’ll spend trying to install it can be better spent working.

 It will take longer for your roofer to fix it because you have the wrong skill set.

 All of this extra work could cost you more than just hiring an expert in the first place, so it’s not worth the time savings of doing it yourself.

 Missing a step will lead to leaks and rot. This means paying much more down the road in maintenance costs and repairs when things go sour, such as bad weather or another storm damages your home’s exterior outside. When this happens, people may miss one or more steps in proper installation, and then they will have to pay for damages again.

 It can be hazardous to your property because you may damage the structure of your house or, even worse, injure yourself or someone else.

 Your roof repairs could take weeks longer than if a professional did it.

 You don’t know what the proper installation procedure is, which could cost you more money.

 Materials are expensive, and buying the wrong ones can be even worse than not having them at all.

 You may just do a poor job at installing your roof’s material.

 It takes a lot of time to install it properly.

 Skilled roofers have the right tools for the job and are trained to do it.

 Professionals know what they are doing; inexperienced people don’t have any experience with roofing construction or installation, so it’s much more dangerous, and no matter how hard you try, you might make a mistake.

 You’ll end up spending extra money because there is a risk that you’ll do more harm than good.

 Even if you follow all safety precautions, accidents are still possible.

 You have to buy suitable materials and tools beforehand. If they aren’t the right ones, your roof won’t be properly installed, and there’s a chance for water damage or mold, leading to serious health problems.

 If you don’t buy the suitable material, your roof may not last as long and require expensive repair work.

 It will be harder to sell your house if repairs are needed for your roof, especially if they aren’t up to code. The buyer will have to pay for this work or back out of the sale, a waste of time and effort.

 You can’t work from the correct blueprints, so there is a chance that you’ll miss one or more steps to get it done, which makes your roof improperly installed and will have to be fixed at additional cost.

 You might not even know how to do everything required, which could make the installation process take even longer.

 You have to spend time and energy on something you might not be good at, which takes away from your personal life.

 It’s harder to find a roofer who is willing to do it for less money after it has been done by someone else due to the increased difficulty of the task.

 You don’t have the necessary knowledge and safety equipment, which means you’ll do a poor job and won’t last or function well.

 There is a risk that you’ll damage your roof because you haven’t had any experience with roofing installations in the past, so there’s no way for you to know if you’ve done it correctly or not.

 You have no idea what you’re doing, which increases the chance that everything will go wrong.

 It can be dangerous for people nearby because there’s a risk that something could fall off of your roof onto another person, which means they’ll get injured or die.

 Roofing tools are cumbersome and can cause significant injuries or death if you don’t know how to use them correctly.

 Poorly installed roofs can lead to leaks which means water damage in your house; this could cause mold growth, an indoor air quality problem that causes respiratory problems like pneumonia, asthma attacks, and bronchitis.

 The standard for roofing installation is very high because it keeps your house in good condition. If you don’t meet those standards, your roof will have problems and might also end up needing repairs.

 It’s more dangerous for the people who are doing it, so even if they do successfully install a roof, they could get seriously injured or killed while performing the task.

 You can’t do it by yourself, which means you will need help, and that means there’s a chance other people could get injured or killed while they are helping.

 Some tools are dangerous, so if one slips out of your hand and hits someone on the head, for example, they could die.

 There’s a risk that you’ll make mistakes that require additional work and money to fix.

 Roofers have plenty of experience, so they know what they are doing; if you don’t follow specific procedures, the roof might not last as long as it should or even end up being damaged beyond repair. The entire process will have been a waste of your time and energy.