Hire a local real estate agent to represent you. 

One way is to just drive around....or have an asst do that.  The truth is that you could fix the roof regardless of whether you buy the house or not.  If you see a bad roof, you can mail the homeowner (or leave a flyer or knock on their door).  Keep the addresses in a database and mail on a regular basis.

Sounds like you have already found the homes.

Next get your financing in order.

Then start making offers that allow enough room for the repairs, risk, and profit.

Omar,

Congratulations! You now see the difference between working in exchange for your time and working for PROFIT. Buying the house changes the dynamics COMPLETELY!  Instead of you looking for agents for roofing jobs, agents will be seeking your for listing opportunities. That reversal can be leveraged.

Every agent who has been in business longer than 10 years have 3 investor types they work with who buy distressed houses. The key word here is BUY, not look at. When an investor type passes on the 3rd house I present, they are moved to the 'D" list.

I will not expose trade secrets in such a public forum. What I recommend is having a meet up with an agent, one whose name you see on flipped houses, perferably one who drives a truck and wears jeans, and ask how you can be part of their team. Offer your roofing solutions, offer your co-marketing plan, ask them about bird dogging for them.

You do not want to talk to an agent who does not know the difference between working for tips and working for PROFIT.

You need to work with a buyer agent in the Dallas area - if you have a targeted area of interest I can probably give you some names of people to call

Get yourself a good Buyer's Broker.  Have him/her present offers, find more houses.

Good luck.

Kathleen Daniels nailed this one!

Work with a REALTOR®

Why not contact a good real estate agent to help you find these homes?

If you see a bad roof and want to buy the house either go to the front door and ask, send a letter or contact an agent and the agent will track down the owner.

YES!  What Kathleen Daniels said- an agent can guide you through the entire process and we have some great Dallas agents on AR too!

Omar, it shouldn't be hard to find a great real estate agent in Dallas!  If you don't know any, ask people you know who 've recently purchased a home for a recommendation - at least if their agent did a great job. 

Join local Meet-up Groups that focus on real estate and investor-related people. Then be relaxed and market yourself on-on-one with the folks you meet.

I'd talk to Richard Weeks.  He's in the Dallas area.

I like Kathleen Daniels' answer.

Form a team and then activate your mission....

As Kathleen Daniels answered:  find a local Dallas agent. You'll find many right here in ActiveRain.   

This is why you want to partner with local real estate agent - win/win for you and the agent

Contact Lisa Von Domek and seek her advice. If she can't help you I bet she can refer you to someone who can.

Hiring a local buyer broker who specializes in reo, short sales and or fixer uppers is a great start. They will know these listings and can help you buy them 

We are an investor friendly brokerage in Dallas.  Send me a message and let's talk.

Just because they have a bad roof doesn't mean they want to sell? I'm not getting you. Are you a roofer or an investor? Many people might not be able to afford that new roof.

Working with an agent will get you the best leads for purchases.

Retain an excellent agent and check the foreclosures opportunities.