Arizona Roofer

Your Roofing Questions Answered

3 course repair

June 27th, 2009
This is how you make a basic repair this is commonly known as a 3 course repair. Materials you will need.

1. Asphalt Roof Cement  or commonly known as “Wet patch , mastic”

2. reinforcment  webbing

3. Trowel

4. Gloves

Doing a basic wall repair like this can save you a lot of money, and is very easy to do.

This is a standard method of repair and can be used on built-up or SBS modified bitumen systems.

Step 1:

Make sure the area is clean from dirt and other debris. If necessary scrape old roofing material off.

Split roofing

Split roofing

Step 2:

Apply a thin layer of wet patch to the area to be repaired approxamately 1/8 thickness  (make sure to apply wet patch at least 2 to 3 inches wide around the entire area of repair).

Apply wet patch

Apply wet patch

Step 3:

Place the reinforcement webbing. Center the webbing with the split.

Apply reinforcement webbing

Apply reinforcement webbing

Step 4:

Apply another thin layer of wet patch on top of the  reinforcement webbing.

Thin layer of wet patch

Thin layer of wet patch

The final repair should look like this. You can apply some aluminum roof coating over the top if you wish, but its not nessecery.

Finished repair

Finished repair

The above pictures are for illustration purposes for a typical 3 course repair only. This type of repair is used on built-up or SBS modified bitumen systems. Or also known as “rolled roofing”.