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Old 03-14-2019, 10:51 PM   #31
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Re: Insulation on no attic roof.


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I understand that, but are we sure that the mold came from condensation or the leaky roof? I never understand how fiberglass insulation needs baffles because all I read on here is it is nothing but an air filter. Anyway, it looks more and more like a sizable check to a pro is all that is going to fix this. The best guess methods of a message board are not going to be appropriate in this case...
I never understand how fiberglass insulation needs baffles

Perhaps that is question you should have asked. In fact the baffles are there not for the insulation but the lack of insulation. In cold climates there is never enough insulation over the exterior wall, the heat from the wall will melt snow, which will refreeze just down slope and cause ice dams, that is solved by the air chutes moving warm air up to the attic.

I warmer weather we want to cool the roof so the heat collected does not damage the roofing and we want to dissipate the heat so it doesn't radiate to the living space.
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Old 03-15-2019, 06:29 AM   #32
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Let me try to get everyone on the same page.

1. Found wet carpet Dec '18
a. Traced water up wall and pulled drywall and insulation from side walls to edge of ceiling where they meet.
b. Found water dripping from top where wall meets ceiling.
c. Removed ceiling drywall and insulation and found streaming leaks in 3-5 places across the roof.
d. Found there to be storm damage present on top of roof.
2. Signs of moisture present in places not near direct leaks.
a. No baffles at soffits, each one was stuffed tight with insulation and rafters were stuffed with 12" 24" insulation.
b. Moisture staining darker near the 3 vents in sunroom roof.
3. Entire roof replaced
a. Stripped down to sheeting, new sheeting over 80% of roof
b. 13 total roof vents
c. Other soffits cleared out
d. 2 Velux FS M08 2004 skylights and install kits
e. Complete GAF Roofing System with 30/50 yr. Labor/Material warranty

Present Day...
1. I plan on adding baffles in each of the sections of the beams
Q1. Do I bring the baffles from the soffits to the attic?
Q2. Do I stop the baffles at the vents on the sections that have a vent, or carry it straight up to the attic?
2. I plan on using all new insulation.
Q3. Since I an replacing all drywall in this room should I use 5/8" ceiling and walls since both are outer-most walls?
Q4. If the insulation is the correct R-value, is there a type that's better, blown, foam, fiber, etc.?
3. There is common space in the attic where the sunroom roof leans into the original peak with the equivalent of 40 sq. ft. of openings where it meets the original house.
Q5. When the beams are insulated again, should they be stuffed all the way to where it meets the attic?
Q6. If the baffles run all the way into the attic, do the use anything to keep bugs out?
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Old 03-15-2019, 07:07 AM   #33
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Re: Insulation on no attic roof.


1. Just past the wall above the original wall into the common space.
2, you are just concerned with the vaulted ceiling
3. If the rafters are 24" on center you need 5/8, walls usually 1/2" but your choice.

4. I would use a bat insulation that gave you the best bang for the buck you will have about 9 -9 1/2" of usable space. If that isn't enough you can put foam board above the drywall. Here is a chart you can find what you should have.

http://dallasinsulationcompanytx.com/r-value.html

5. stuffed, no but placed all the way just over that wall, the back side of that wall should be insulated on the attic side.



6. not usually and you have limited venting if you had more venting you could do a bug screen but over time that plugs up with dust and blocks the vent.



We still need to figure the best way to vent above and below the sky lights.
I am going to look over you pictures.

Ceiling light fixtures will need to be sealed against air getting past them.
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Old 03-15-2019, 07:33 AM   #34
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Re: Insulation on no attic roof.



In this picture we can see that they notched the rafters which is a big no no.

They need hangers and they are cheap and easy but they don't make a hanger for that so you have to cut the bottom level to take a regular hanger. That will not effect the drywall.

http://www.dhcsupplies.com/store/p/3...st-Hanger.html


The hangers get more important because i want you to drill hole3 right next to sheet just below and just above the skylight to allow air movement. Like 3 1 1/2" hole right next to the sheeting on both side just below and above the skylights and then when you do the chutes, doctor something up that will keep the space open for that air flow.
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Old 03-15-2019, 04:41 PM   #35
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Thanks for all the answers. I can add the rafter joints and drill out the holes for the skylights. By what you said its 4 holes total for each skylight, right?
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Old 03-15-2019, 05:01 PM   #36
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Re: Insulation on no attic roof.


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Thanks for all the answers. I can add the rafter joints and drill out the holes for the skylights. By what you said its 4 holes total for each skylight, right?

I have marked three of the four areas to drill the holes. I would do 3 in each area right next to the sheeting.
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Old 12-30-2019, 10:25 AM   #37
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I finished the room and roof Thanks for all the help. Yes, it took a long time to finish.
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Old 12-31-2019, 06:45 AM   #38
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Re: Insulation on no attic roof.


Nice work!!
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