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18 yo roof,roof vent and repair #4676570
02/24/18 03:17 PM
02/24/18 03:17 PM
Joined: Dec 2012
Posts: 605
Washington for now
WhyMe Offline OP
WhyMe  Offline OP
Joined: Dec 2012
Posts: 605
Washington for now
i was helping my cousin do some stuff . we went into the attic and we noticed the osb where the dryer roof vent is rotten. don't know how long its been like that.

So his house is 18 yo and the original composite roof. he is thinking of just fixing that area and i suggested just getting a reroof as the roof is probably at the end of its life. Also, we would like to figure out why that area rotted. his house is 2 stories and the vent is way of top because his W/D is on the second floor .

So how long do composite roof usually last. better to just replace whole roof than a repair ?

Last edited by WhyMe; 02/24/18 03:25 PM.
Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4676591
02/24/18 03:34 PM
02/24/18 03:34 PM
Joined: Sep 2005
Posts: 5,684
MIchigan
Warstud Offline
Warstud  Offline
Joined: Sep 2005
Posts: 5,684
MIchigan
Without pictures I would guess the humidity coming from the vent caused the wood to rot. And maybe use composite wood to replace the rotted wood is a good idea. Replace the whole roof....that's a decision your cousin will have to make.

Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4676593
02/24/18 03:36 PM
02/24/18 03:36 PM
Joined: Oct 2009
Posts: 3,225
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline
Joined: Oct 2009
Posts: 3,225
Wet side WA
Depends on the quality and weight of the roofing material they can run anywhere from 15 to 30 plus years.

But my guess is he will replace that roof this summer if he's smart.


Last edited by JohnnyJohnson; 02/24/18 03:37 PM.

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Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4676668
02/24/18 04:31 PM
02/24/18 04:31 PM
Joined: Mar 2017
Posts: 5,469
Soviet State of Washington
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,469
Soviet State of Washington
I would reroute that dryer vent out the side instead of out the roof. Iíll bet the duct is plugged full of lint too. As for the roof, get on top and check the shingles. He may have a few years left which would give him a chance to save up.


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Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4676674
02/24/18 04:38 PM
02/24/18 04:38 PM
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
Was the osb black with mold or actually crumbling away? Maybe the vent was improperly installed, or the vent is leaking humid air into that vent. You'll have to inspect the roof.

Depending on how bad the roof is you may be able to repair the area, or maybe you can just replace that section of shingles on that roof.

Usually southern roof exposures will deteriorate fastest.


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Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4676676
02/24/18 04:41 PM
02/24/18 04:41 PM
Joined: Sep 2005
Posts: 5,684
MIchigan
Warstud Offline
Warstud  Offline
Joined: Sep 2005
Posts: 5,684
MIchigan
You sure it isn't the bathroom vent ?

Re: 18 yo roof,roof vent and repair [Re: JC1] #4676724
02/24/18 05:21 PM
02/24/18 05:21 PM
Joined: Dec 2012
Posts: 605
Washington for now
WhyMe Offline OP
WhyMe  Offline OP
Joined: Dec 2012
Posts: 605
Washington for now
Originally Posted By: JC1
Was the osb black with mold or actually crumbling away? Maybe the vent was improperly installed, or the vent is leaking humid air into that vent. You'll have to inspect the roof.

Depending on how bad the roof is you may be able to repair the area, or maybe you can just replace that section of shingles on that roof.

Usually southern roof exposures will deteriorate fastest.


both. there is black mold and its soft and crumbly. its not a small area, 2x2 feet . its the dryer vent for sure. can't see the vent from the outside unless we hop into the neighbors yard due to the angle.

he has a guy coming next week to look at it. i bet he is going to tell him to replace the roof.

Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4676764
02/24/18 06:13 PM
02/24/18 06:13 PM
Joined: Sep 2004
Posts: 7,530
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,530
Marshfield , MA
At 18 yrs old, the roof is only 1/2 worn out. Is the roof pitched low enough to move around on safely? As roofs go, 2'x2' is a small area. Also it may be larger because you want to cut the OSB in the middle of a rafter. Splurge on a full sheet or have a big box store cut you the exact size you need. If they will sell you some tar paper and/or ice and water shield by the foot that would be awesome. Use a hammer and a catspaw to remove nails etc.A wall paper scraper makes a great tool to separate the tar dots. How are the shingles attached? Nails or staples? Try to remove the shingles intact. Push comes to shove, you may have to buy a bundle. Slide the paper underneath at the top and sides on top at the bottom Figure out what is up with the drier vent. If they are restricted, they create condensation in addition to wasted energy etc. Even expensive metal duct is lousy for dealing with lint. The ducts need at least yearly cleaning.


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Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4679679
02/27/18 01:58 PM
02/27/18 01:58 PM
Joined: Sep 2007
Posts: 968
TX, USA
JMJNet Offline
JMJNet  Offline
Joined: Sep 2007
Posts: 968
TX, USA
Use Ice & Water shield on all areas that needs flashing and valleys.
This type of material is not available 18 years ago.

If he decides to replace the roof, ask to use the Ice&Water shield also in addition to metal flashing and metal parts for anything coming out through the roof.

In theory roof should last 20-30 years for 30 years roof.
But if there is water seeping, something has failed so the age of the roof is determined by what failed first not just the roof materials.

Last edited by JMJNet; 02/27/18 02:00 PM.

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Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4679686
02/27/18 02:08 PM
02/27/18 02:08 PM
Joined: May 2012
Posts: 4,454
Baltimore, Maryland, USA
zzyzzx Offline
zzyzzx  Offline
Joined: May 2012
Posts: 4,454
Baltimore, Maryland, USA
I would also expect a roof in that part of the country to last a lot longer than 18 years, unless there is install issues, or really cheap materials (absolutely possible on any house built new).

Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4679735
02/27/18 03:07 PM
02/27/18 03:07 PM
Joined: Dec 2012
Posts: 605
Washington for now
WhyMe Offline OP
WhyMe  Offline OP
Joined: Dec 2012
Posts: 605
Washington for now
got a roofing company coming on friday. will update you guys on what he says .

Re: 18 yo roof,roof vent and repair [Re: WhyMe] #4685536
03/05/18 08:18 PM
03/05/18 08:18 PM
Joined: Dec 2012
Posts: 605
Washington for now
WhyMe Offline OP
WhyMe  Offline OP
Joined: Dec 2012
Posts: 605
Washington for now
update :

2 roofers came ams took a look at the roof. the one side where the vent is is pretty worn and they suggest replacement. one is a GLA rep and the other pabco and certainteed.

the work looks pretty close as is the warranty. the difference is the price. they is 5-7k difference depending on what grade of shingle is chosen.

thats quite a bit of difference. So are pabco stuff any good?


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