roofing
We just found this dip in our roof that it causing rain water to leak through the wood directly under it. (It covers an open patio, not interior living space.) We'd like to make the repair ourselves instead of hiring a roofer, but I'm not sure where to start. The roof has asphalt architectural shingles and we live in the northeastern U.S. where we get a lot of rain, snow, and wind. Basically, our roof takes a beating so we need to make sure the repair is sound and will hold up in nasty weather.
It would be worth finding a thatcher - if only so you have someone who will repair/replace the roof when the time comes.
A good one will be able to tell you what maintenance work you need to have done and which tasks you as householder can do.
You wear a harness attached to a rope that is thrown over the roof and tied to something solid such as a tree.
The harness kit may look like this:
The harness is most often used in a manner as shown here. A short connecting rope goes from the middle of the high back over to a D-Clip that then attaches to the main safety rope via a Robe Grab.
Rope grabs come in various styles (one shown below) but are basically designed to permit them to slide along the rope when they are directly pushed but will clamp tightly on the rope when pull tension is applied to the connecting ring from the D-Clip and short rope to the roofer.
This picture shows a harness in use on a roof....albeit not quite as steep as the OP has asked about.
Here is another in use application.
Best Answer
This problem is likely caused by one of these things:
The fix needed to take care of the problem will require detailed analysis to determine the exact cause of the dished shingles. Once that is understood you can proceed with the proper fix.