QRFL

Thu Aug 11, 2005 1:45 am

this is what you get if you dont ventilate your home:

http://www.grangevilleenvironmental.com/AtticMold.htm

http://www.professionalroofing.net/article.aspx?A_ID=675

up your attic that is

i think pride agrees

cungvu

Thu Aug 11, 2005 2:05 am

Hi ,
Does any one know the term of Hard Valley" or "California Valley" what it means?
What I heard the contractor describe my house is the junction of leff, right and top roof
join due to the extesion of the house and there's a metal sheet to cover that junction.

Since the contractor replaced my roof by shingles and I check it and found the quite big
piece of metal sheet (used to be there from the previous owner) stay on the new roof.
Honestly, it screws up the view of my roof and I dont know why they raise this concern.

If I want to fix as cosmetic, does it consider a big project lke frame (modification) ?

I really appreciate your input since I am 101 student.

Thanks again.
C.

QRFL

Thu Aug 11, 2005 2:07 am

just got done talking with the GAF rep, he was telling me about an open beam ceiling which was actually driping water in a nice sunny day, this went on for like a few months,after a long inspection they found out it was all condensation ,they installed cobra vent which is not necesarily my favorite and problem solved..

however i heard very good things about shingle vent II.

http://www.airvent.com/homeowner/resources/comparisonCharts.shtml

QRFL

Thu Aug 11, 2005 2:18 am

cungvu valleys are done diferent for different kinds of shingles a standard 3-tab shingle or Lighweight dimensional you can weave them across the valleys, if its done right and you have proper underlayment (tar paper) you should never have a problem with it and you wont be looking at an ugly piece of metal right there in the center.
california valley is just a name for your roof design, the new roofer should have replace this valley metal when he re-roofed, (sounds like a cheese installation allready since valley metal is only like $10-$15 bucks).
you shouldnt need to do any structural modifications, unless you have big bumps in the wood at the center of the valley, or if you have skip-sheeting (which i doubt) and dont have solid sheeting.
if you have wood shingles, or heavy weight lifetime shingles, like grand canyon, then leave your valley metal alone if its not leaking and just paint it.

cungvu

Thu Aug 11, 2005 5:53 am

Thanks for your reply.
What I mean the triagle metal looks ugly b/c it stays inside the new roof.
Let me draw a bit detail :
the house is a style of hip, ranch house. People added extra room
and builded up the new frame on the old frame. I saw 2 frames on
my roof which I dont like due to not to have much room to clime closer
to the edge of the frame.

---------------------
\ .. \ top /
Lef\ .. \-------------/ Right
\ \ metal /
\ here /
\ stays
\ flat/
===============================
gutter here
===============================

1. Why that piece metal stay in flat instead of the roof, i.e shingle ?
As I heard from the contractor explains it calls "hard valley" or
"hot valley" and the metal task is to let water flow quicker down
to the gutter ?


Many thanks gentleman.
Cung

QRFL

Thu Aug 11, 2005 6:22 am

cungvu i find it a little hard to understand your drawing, check out this link has a roofer doing a valley without valley metal :
http://www.roofer911.com/roofing_valleys.htm

hopefully this will help you understand this option, i will need to see a picture of what you are talking about to further asist you , you might be leaving something important out by just trying to describe it.

i have seen a person use this site to post pictures ( i am not sure what the terms are do)

http://imageshack.us

good luck , god bless

SYS

Fri Aug 12, 2005 2:19 pm

Ok now lets be realistic. If someone doesn't vent their roof properly it will cause problems, no doubt. The wood decking will dry rot, curl up, buckle, etc. Some of those photos on the link posted look like actual roof leaks. I have only been in the game for 7 years or so, but I never seen inproper ventilation cause those problems. I have had to replace tons of sheets of plywood due to inproper ventilation.
SYS

QRFL

Fri Aug 12, 2005 6:57 pm

some homes with poor ventilation can make you pull out a bucket on a sunny day

SYS

Fri Aug 12, 2005 8:19 pm

Can't help but wonder what part of the world you are all in.

Master

Fri Aug 12, 2005 8:28 pm

I am in Chicagoland. I have seen roofs do this before in winter when there is insufficient nsulation and ventilation. Stick aroung the game a while and youll see lots more stuff that you will never believe.

SYS

Fri Aug 12, 2005 8:40 pm

with no insulation it makes total sense. When you got supersceding temp's your going to get moisture, windows in the winter time are the perfect example of it. I have only been on a few jobs where they had vaulted ceilings in their homes. So it wasn't the first thing on my mind. I'm in St. Louis not to far from ya

QRFL

Fri Aug 12, 2005 9:02 pm

yea sys i am in CA and it is very rare, i heard stories about open beam ceilings,or vaulted ceilings , all it takes is a bathroom vent going into the open atticc, or humidifiers,etc.

Pride_roofing

Sat Aug 13, 2005 11:22 am

QRFL is correct when stating that when improper ventilation can and will cause a "leak type" situation. What I mean by that is here in Michigan i have gone into homes that is leaking in several spots and them get in the attic and find nothing but water from 1 end to the other. Basic raining in the attic. Heat rises so cold out side poof a high pressure and low meat what do you get rain. It will make for a repair situation but it is purely a ventilation problem. WHen it goes to that extream you have no choiuce but to replace all insulation do the proper ventilation and problem will fix itself after you tear all the decking off and replace due to mold on every 4x8. TO further the game using a moisture meater in attics will help too. Here is a link. http://www.rsimag.com/rsi/article/articleDetail.jsp?id=170751

SYS

Sat Aug 13, 2005 6:43 pm

You know I thought about it and Iknow why I wasn't thinkin about that. I have installed new or replaced old vents on every job I have ever done. Never leave a home without em