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  #16  
Old 1/4/18, 12:32 PM
Michael A. Clark, CMI's Avatar
Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: It's Raining in My Attic!

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Originally Posted by dandersen View Post
If you can't find it. I always wanted to go to "Almost Heaven"!
Hard to tell from my pic, but there's a Ridge Vent up there. Another concern is the right side of the house(in the attached pic) does not have attic access. The attic I looked at is above that octagon window. I'm afraid there's going to be problems there as well. I told my client he needs to cut an access so we can look up there. Poor design, IMO.

Well, I could definitely use your experience and expertise up here, David.

I doubt me, or the client, could afford it. Don't get me wrong, I realize he can't afford not to either. That's really what I'd like to do..a pressure/blower door test, just don't have the equipment or training. I'd like to start with IR. I'm sure that will reveal a lot of these guesses.

I know my location states "Almost Heaven". And it usually is. But the last few days it's been cold as Hell!
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Last edited by mclark2; 1/4/18 at 12:40 PM..
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  #17  
Old 1/4/18, 12:48 PM
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Default Re: It's Raining in My Attic!

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Originally Posted by mclark2 View Post
But the last few days it's been cold as Hell!
And it was warm when you took those pics.
Are you sure that ridge vent is open to the attic. My guess is excess moisture build-up in attic along with lack of ventilation.



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  #18  
Old 1/4/18, 1:08 PM
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Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: It's Raining in My Attic!

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Originally Posted by mgratton View Post
And it was warm when you took those pics.
Are you sure that ridge vent is open to the attic. My guess is excess moisture build-up in attic along with lack of ventilation.
I've been saying this since he called me--inadequate ventilation, coupled with warm air infiltration from bypass.

I'm relatively sure the ridge vent is open to the attic. When in the attic, and looking up, I can see the foam that's under the ridge vent. I cannot see daylight, but I seldom do. Maybe the ridge vent is clogged somehow?




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  #19  
Old 1/4/18, 1:12 PM
David A. Andersen, TN HI# 40's Avatar
David A. Andersen, TN HI# 40 David A. Andersen, TN HI# 40 is offline
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Default Re: It's Raining in My Attic!

I am less concerned about ventilation than the source of moisture.
You can't ventilate your way out of this.
Increased ventilation increases moisture passing through the build envelope. and that aint good.

Just like you don't pump water out of a wet basement. You stop the source first.



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  #20  
Old 1/4/18, 1:13 PM
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Default Re: It's Raining in My Attic!

Are they running a whole house humidifier, or any other type of humidifier?




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  #21  
Old 1/4/18, 1:24 PM
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Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: It's Raining in My Attic!

Quote:
Originally Posted by dandersen View Post
I am less concerned about ventilation than the source of moisture.
You can't ventilate your way out of this.
Increased ventilation increases moisture passing through the build envelope. and that aint good.

Just like you don't pump water out of a wet basement. You stop the source first.
Good point. I tell my clients this when they have that interior sump system installed in their basement.




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  #22  
Old 1/4/18, 1:25 PM
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Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: It's Raining in My Attic!

Quote:
Originally Posted by agriffin View Post
Are they running a whole house humidifier, or any other type of humidifier?
no humidifiers




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  #23  
Old 1/4/18, 1:36 PM
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David A. Andersen, TN HI# 40 David A. Andersen, TN HI# 40 is offline
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Default Re: It's Raining in My Attic!

Quote:
That's really what I'd like to do..a pressure/blower door test, just don't have the equipment or training. I'd like to start with IR. I'm sure that will reveal a lot of these guesses.
Something you might consider.
Get out of the HI Racket and solve peoples problems.

No Buyer cares if their Door Bell works!
Help Identify and Solve the real building problems.
I think you would be a good candidate.



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  #24  
Old 1/4/18, 2:15 PM
Michael A. Clark, CMI's Avatar
Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: It's Raining in My Attic!

Quote:
Originally Posted by dandersen View Post
Something you might consider.
Get out of the HI Racket and solve peoples problems.

No Buyer cares if their Door Bell works!
Help Identify and Solve the real building problems.
I think you would be a good candidate.
Thanks David!

I would like nothing more than to do what you and Red Hat are doing, and I think you're right about the HI racket.

I don't go into anything half-cocked. I realize that Building Science and qualified IR is a completely different field, and cannot be taken on as an "ancillary" to Home Inspections. If done right, it's a whole different and separate field, training, and education requirements.

Like a Doctor deciding to become a Lawyer.

At 57, I'm not sure I want to commit to starting what it would take to be as good and successful as you guys are.




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  #25  
Old 1/4/18, 6:11 PM
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Default Re: It's Raining in My Attic!

I'm just going to toss in my nickel's worth. I can see the ridge vent on the exterior pics and you saw the foam didn't appear blocked. I also saw the soffit baffles in your interior shots - it looks to me that that is where the moisture is entering (darkness of the OSB is moisture?).

But I saw no soffit vents from the outside, my guess they were covered with vinyl when the soffits were built. All the conditioned air is being sucked up the wall cavities through outlet covers and any other gap that a difference in air pressure would allow it to flow.

Good news: His ridge vents work really well. Bad news: His soffit vents are constricted on the outside, causing conditioned (moist) air to flow up the walls and condense on that cold OSB. Solution: Drill in circular soffit vents every 24" along the outside of the soffits (and perhaps send the bath fans out through the roof).
But I'm an inspector, so I may verbalize that solution, but I'd defer to a qualified contractor to review / repair the soffit venting and bathroom exhausts.
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  #26  
Old 1/4/18, 6:42 PM
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Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: It's Raining in My Attic!

Quote:
Originally Posted by snadeau View Post
I'm just going to toss in my nickel's worth. I can see the ridge vent on the exterior pics and you saw the foam didn't appear blocked. I also saw the soffit baffles in your interior shots - it looks to me that that is where the moisture is entering (darkness of the OSB is moisture?).

But I saw no soffit vents from the outside, my guess they were covered with vinyl when the soffits were built.


I sure hope it's that simple.

Thank you Steve!

{UPDATE}: Nope, he looked last night, the soffits are vented.




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Last edited by mclark2; 1/5/18 at 8:58 AM..
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  #27  
Old 1/4/18, 8:38 PM
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Default Re: It's Raining in My Attic!

(I only skimmed through all the posts), but keep one thing in mind when beating yourself up about "why now, and not before"... every family has their own unique living habits that affect the RH in a home. Teenagers love to take 30 minute steaming showers without opening a window or turning on a fan, and then open the door to release all that steam into the home... Italians love to boil huge pots of water for their pasta... etc... etc...etc... Consider all that steam being introduced into the attic via bypasses and also venting to the soffits only to be drawn back into the attic.



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  #28  
Old 1/4/18, 10:23 PM
Don Gouge Don Gouge is online now
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Default Re: It's Raining in My Attic!

Quote:
Originally Posted by mclark2 View Post
All good points. The ductwork is insulated, but laying underneath (for the most part) of the blown in cellulose. They are securely fastened to the air handler (thanks Joshua), and are secured to the vent boots. I didn't notice any air loss there.

I'm thinking that the baffles, though in place, are blocked, and as mentioned, the ridge vent is sucking the conditioned air through duct penetrations, light fixtures, etc., as well as the loosely fitted drywall hatch cover.

Strange this must have never been a noticeable issue before. House built in 2008, no blackened sheathing from this occurring over the last 10 years or so. Possibly the house didn't have as many occupants before, there are 2 adults and 2 teenagers living there now, which may add to the moisture load.

Thanks guys!
I am new to the inspection business but I had a lot of experience as an insulation contractor in a previous life. First, is that cellulose insulation? It looks like fiberglass to me. Just a note about the soffit vents shown in your pics. For these to properly work, fiberglass batt insulation needs to be stuffed around the base of the styrofoam baffles above the exterior wall plates to keep loose fill insulation from blowing around them and blocking the soffit air flow. Since the blown in insulation will cover this area you may not realize that the soffit is blocked if the stuffed fiberglass was omitted. I also noticed that the area was black over the duct. Could this duct have come partially loose and be leaking air? Also, the change of occupants could be a source. Perhaps a shower that was rarely used before that one sees heavy use? Bath fan exhaust hose blocked or leaking for the teenagers' bath?
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  #29  
Old 1/4/18, 10:29 PM
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Default Re: It's Raining in My Attic!

Quote:
Originally Posted by mgratton View Post
And it was warm when you took those pics.
Are you sure that ridge vent is open to the attic. My guess is excess moisture build-up in attic along with lack of ventilation.
Where I am, and I don't think Mike is too far away, every ridge vent in the area is totally sealed with about 5 inches of snow and ice.

All next week the weather forecast is mid 30's- low 40's so most if not all of this snow will be gone...for now.



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  #30  
Old 1/5/18, 8:55 AM
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Michael A. Clark, CMI Michael A. Clark, CMI is offline
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Default Re: It's Raining in My Attic!

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Originally Posted by drange View Post
Where I am, and I don't think Mike is too far away, every ridge vent in the area is totally sealed with about 5 inches of snow and ice.

All next week the weather forecast is mid 30's- low 40's so most if not all of this snow will be gone...for now.
Not much snow here, Dave, only about an inch or so, but it's been single digits temps




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