I'm in the contracting phase of a roof strip and replacement job for my
split-level house. The shingles will be the architectural type, either
by GAF or Certainteed.

My leading proposal has specified shingle valleys. Aluminum flashing is
also available. Are shingle valleys as watertight and long lasting as
metal flashing?

The roof currently is ventilated by gable vents and there is no ridge
vent. I have specified that a ridge vent be installed. The existing
soffit vents are circles only about 3" diameter spaced every four feet.
I think we need better soffit venting.

The contract has an option for air vent ventilated dripedges. Is this
worthwhile, or would merely cutting in more (larger) vents work just as
well?

Any advice for roofing work would be much appreciated! Thanks.

On Tue, 12 Apr 2005 22:22:26 -0400, Jamie Smithi
scribbled this interesting note:

I'm in the contracting phase of a roof strip and replacement job for my
split-level house. The shingles will be the architectural type, either
by GAF or Certainteed.

My leading proposal has specified shingle valleys. Aluminum flashing is
also available. Are shingle valleys as watertight and long lasting as
metal flashing?

A properly installed closed valley will last as long as your roof will
last.

The roof currently is ventilated by gable vents and there is no ridge
vent. I have specified that a ridge vent be installed. The existing
soffit vents are circles only about 3" diameter spaced every four feet.
I think we need better soffit venting.

You are correct. You need additional soffit vents.

The contract has an option for air vent ventilated dripedges. Is this
worthwhile, or would merely cutting in more (larger) vents work just as
well?

I've seen but never use the ventilated drip edge. I don't like the
looks of it. Seems to me that it would require frequent cleaning to
clear accumulated dust. More soffit vents or even continuous soffit
vents would be better.

Any advice for roofing work would be much appreciated! Thanks.

Hope this helps.


--
John Willis
(Remove the Primes before e-mailing me)

Shingle Valleys IF installed (woven) properly, are great. If not
interwoven, they may reek.

The ventilation system should be designed holistically so that air
movement is proper. Are their airflow problems currently ?