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Old 01-10-2013, 08:42 PM   #16
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1925 brick Bungalow attic project


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-pugsy
I re-calculated the room width and got the same results. Both methods give the same answer.
Sorry about that. I thought the picture was a sample from somewhere and not your house.

If this is your house, the numbers are dead on and not looking good at all.

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Old 01-12-2013, 11:46 AM   #17
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1925 brick Bungalow attic project


If I make the room a general purpose room the average height can drop to 7'

This is what the it would look like.
This option would add 350 sq feet to house I just can't call it a bedroom.



GBR - Not sure what measurements I made before, But I can frame up the window larger to make it up to code.
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Old 01-12-2013, 12:12 PM   #18
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That's a decent sized space.
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Old 01-12-2013, 03:55 PM   #19
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1925 brick Bungalow attic project


Did you ask your AHJ? Usually the knee walls can be as short as needed, only the code lists minimum per room size.

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Old 01-18-2013, 10:08 AM   #20
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1925 brick Bungalow attic project


Talked with the local AHJ. He said I could drop the ave height down to 7' and still call it a bed room

He also said I need an R value of 38, so it looks like I need a thick 5.5" layer of spray foam for the room.

I think i will spray 2" on the roof portion that is not part of the room and 5.5" for the part that is part of the room.
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Old 01-22-2013, 09:36 PM   #21
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1925 brick Bungalow attic project


Here is my insulation plan
use Demilec Heatlok Soy 200 7.4 R value at 1 inch
spray 5.5 in thick for room and 2 in thick for the rest of attic roof.
I am also thinking about adding fiberglass under the 2in foam section of attic.


Here is what the space is looking like.



What do you think?
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Old 01-24-2013, 05:09 PM   #22
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1925 brick Bungalow attic project


What did he say about venting the lower attics behind the knee walls?

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Old 01-25-2013, 07:46 AM   #23
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Gary ,

We did not talk about it. He told me to make sure to vent the bathroom If i do put one in.

The attic currently does not have any venting so I think keeping it that way with spray foam would be the easiest way.
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Old 01-26-2013, 10:27 PM   #24
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1925 brick Bungalow attic project


Looking for a little advice on HVAC for the attic space. How do i know if current HVAC system can handle the extra space?

Should I look into a Ductless Mini Split?

Thanks,
Chris
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Old 01-27-2013, 12:22 AM   #25
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Start another thread in the HVAC forum, here; http://www.diychatroom.com/f17/

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Old 02-23-2014, 04:15 PM   #26
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Quote:
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Gary ,

We did not talk about it. He told me to make sure to vent the bathroom If i do put one in.

The attic currently does not have any venting so I think keeping it that way with spray foam would be the easiest way.
You had better do some dew point calculations, because the attic use is going from a cold area to a heated area.

Also, If I was you I would see how much deflection you have in those rafters, they look significantly deflected now, but that could be an optical illusion in the photo. What is the age of this home? around 1938? Are you sure on the depth of the rafters? Not 5-5/8"? or even 3/4"?
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Old 02-23-2014, 10:05 PM   #27
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Rafters are 5-5/8 x 1-5/8"

I put a laser on them and did not see much deflection at all less then 1/8 in

I will looking to the dew point calculations.
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Old 02-25-2014, 03:15 AM   #28
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Judging from the photos you posted your attic has no ventilation. Your insulation plan is an absolute positively NO NO.
I would strongly recommend hiring a contractor, one that can obtain a permit.
One that gives free estimates, get at least three.
Don't just ask the contractor for references or photos. Ask to see actual prints that were submitted for a permit that has the raised seal of approval on them.
In some areas knee walls are allowed to be as low as 4', providing the rest of the code is met.
A good idea would be to get the contractor to do the framing, ventilation, and insulation.

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