Flat roof REPAIR only: Can I do this on my own? Or is it too hard?

I think they tell you that because they cannot give you a warranty for just a patch. You don't want to have to patch another spot in another year, etc. You would probably need some sort of rubberized material to help with the water proofing. Perhaps check You Tube to get an idea of what to expect.

We used tar paper and tar on ours and my dad did it himself!

Check out a product called "Through The Roof", we fixed our roof with it two years ago and it still does not leak that stuff is amazing. It's a little on the pricey side about $15 for a quart but it does the job so if your roof is leaking and you can't afford a repair or a replacement that's the way to go!

Here's the link with info about "Through the Roof"...http://www.sashco.com/products/through-the-roof/

Depends on your skill level. Watch a few YouTube videos and see if you thing you can do it..... you could hire a handyman much cheaper to help you if he has some construction skills. https://www.youtube.com/results?search_query=how+to+replace+a+shed+flat+roof

https://www.youtube.com/watch?v=Pv_DwWNbtd4

Managing a cracked flat roof can be very disappointing, also that on the off chance that things are not done as expected, the broken rooftop can be incredibly unfavorable to your property’s general honesty and worth. There are many reasons for flat roof damage. But its maintenance is made very easy if you choose a good roof repair which is liquid butyl rubber. Its fiberglass quality makes the roof flexible and strong through extreme weather conditions.

You can repair your flat roof by yourself with the help of DIY liquid EPDM coating. I also have a flat roof and whenever I face issues with my flat roof, I use EPDM Liquid butyl rubber and I also highly recommend this amazing product to you. DIY EPDM liquid butyl rubber is the best repairing solution having excellent waterproofing abilities for almost all types of roofing materials. It is a very durable and long lasting DIY solution to leak issues. It can withstand ponding water 365 days a year, has high reflectivity and flexibility along with high insulation that makes the roof less susceptible to extreme weather conditions.

Here's a video that might be helpful for you! https://www.youtube.com/watch?v=8oJGjrLummo