Ridge vents Homemade? Shingles extedning over fascia?

cory nystul · 08-29-2014, 08:21 PM

I was on a roof today that had SO many issues its not even funny.

TWO questions

#1. Is there a requirement for how far a shingle should extend over the fascia?

#2. Is the below ridge vent homemade? I have never seen this before. It is not fully covered by the shingles and it also extended off the end of the roof a good 6-8"
rodge.jpg

**John Kogel** · 08-30-2014, 07:35 AM

Your pic doesn't show us anything.
Message to the 3 Corys.

**Dom D'Agostino** · 08-30-2014, 07:42 AM

The ridge vent has a built in edge or louver, see them frequently. Keeps horizontal wind driven rain out.

Dom.

**Billy Stephens** · 08-30-2014, 07:58 AM

Originally Posted by Dom D'Agostino

The ridge vent has a built in edge or louver, see them frequently. Keeps horizontal wind driven rain out.

Dom.

Cory,

They also should not be installed to the end of the ridge but back as you described .

**Jacob Sebrell** · 09-12-2014, 08:47 AM

Originally Posted by cory nystul

I was on a roof today that had SO many issues its not even funny.

TWO questions

#1. Is there a requirement for how far a shingle should extend over the fascia?

#2. Is the below ridge vent homemade? I have never seen this before. It is not fully covered by the shingles and it also extended off the end of the roof a good 6-8"
rodge.jpg

This is an externally baffled ridge vent. This creates a Bernoulli effect, causing low pressure to develop on both sides of the vent which literally pulls air out of the attic. This is a very good type of ridge vent.

**Nick Ostrowski** · 09-12-2014, 11:38 AM

I recommend baffled ridge vents over mesh ridge vents. The mesh ridge vents can be short circuited by winds as little as 5 mph that blow perpendicular to the mesh opening. The baffle pushes wind over top of the vent and creates the Bernoulli effect like Jacob mentioned.

**Mark Reinmiller** · 09-12-2014, 08:00 PM

I believe the answer to the first question is typically 3/4".

**Allen Ingling** · 09-20-2014, 04:55 PM

One should always read the directions printed on the shingle pack. I have done roofing, and seen lots of other's work. I rarely see roofers adhering to the directions on the pack. Typically, manufacturers recommend 1/2 to 3/4 inch extension beyond the drip edge (if the installer put drip edges on, many don't), otherwise same distance on whatever is there. I have seen edges extended two inches or more past roof edges, they invariably bend and break, exposing vulnerable materials.