One of the reasons is that your shingles may be too short.
Installing a gutter drip edge.
Other causes of the water running behind the gutter if properly installed are roofing not extended 3 8 past drip edge improper overlap of drip edge ice.
Installing drip edge on your roof.
To install a drip edge on a newly constructed roof or on a re roofing job attach the drip edge along the roof s eaves first.
Place a nail at one end then the other.
Home centers sell rolls of 6 in.
Rain gutter installation can be a tricky job and a lot of.
If the gutter is not behind the drip edge there is a chance that rain or melting snow may not fall from the edge of the drip edge but instead cling to the metal and run behind the gutter.
Make sure the outer edge extends over the gutter.
Make sure the corner is tight and that the bottom edge is tight to the fascia before nailing off the drip edge.
Begin at the lower corner of the roof and gradually progress to the top.
This is important to protect damage to your fascia soffits rafters.
How to install a drip edge.
Be sure to tuck the drip edge under the starter strip and felt paper.
If there s a drip edge installed where the fascia meets your shingles and the gutter is hung below the drip edge get some roll flashing and tuck it up under the drip edge and over the top of the gutter.
You can use nails to tightly secure it.
Slip the wide flat flange of the material all the way under the first course of roof shingles as illustrated.
Raise the shingles and push the top rim of your drip edge beneath them.
Slide the corner tight to the fascia.
A furring edge is a strip of one by two wood you install on the vertical surface of the house just beneath the roof s edge.
Ideally it is recommended to nail about every 12 inches.
If using a type c drip edge you can install a furring strip to increase its performance.
Secure the drip edge with roofing cement.
While the vertical leg should be placed 1 4 1 2 away from the fascia.
You may need to nail through the starter strip into the drip edge.
With without rain gutters.
Begin installation it is best to install a drip edge on a day with warm weather because it makes it easier for the shingles to be stripped back.
The roof leg should extend a minimum of 2 back onto the roof sheathing.
For drip edge installation align it for directing water flow into gutter alongside the roof edges.
Tools supplies tin sn.
Make sure to support the long end of the cut if you let it fall after cutting it will bend down and kink the drip edge.
There are two reasons for water getting behind the gutter.
If it doesn t pull the drip edge out slightly from under the shingles.