What R value to blow in ceiling?

[estesbubba]

My pole barn is going to be used for a hobby woodworking shop. I'll keep the temperature around 40-45 when not in there and 55-60 when working in there. When I need to spray waterborne finishes I'll get it up to 68-70. I plan on heating it with a propane ceiling mount heater.

My walls will be R-19 and the bottom of my trusses are 2x8's. My ceiling and walls will be 7/16" OSB. What R value should I do for the blow in ceiling?

 

[benjamintmiller]

Where do you live?

If you're in the US, use this map.

 

[MScott]

Or put your location (state, province, country etc.) in your profile. Any answer to your question is useless without your location.

 

[estesbubba]

Omaha, NE area which is zone 5.

 

[LB-1911]

My pole barn is going to be used for a hobby woodworking shop. I'll keep the temperature around 40-45 when not in there and 55-60 when working in there. When I need to spray waterborne finishes I'll get it up to 68-70. I plan on heating it with a propane ceiling mount heater.

My walls will be R-19 and the bottom of my trusses are 2x8's. My ceiling and walls will be 7/16" OSB. What R value should I do for the blow in ceiling?

Omaha, NE area which is zone 5.

What are the dimensions of your structure?

Have you considered partitioning off a section and use it as your spray booth?

 

[estesbubba]

It's 30x40 and I've thought about a separate spray booth and won't do it initially.

 

[readhead]

Is the heater a sealed combustion unit? If not it can put a lot of water in the air. I would put at least an R-30 in the lid.

 

[theoldwizard1]

My walls will be R-19 and the bottom of my trusses are 2x8's. My ceiling and walls will be 7/16" OSB. What R value should I do for the blow in ceiling?

As much as will fit and you can afford.

That is a SERIOUS reply ! With ceiling insulation, MORE is always better !

 

[Norm01]

R-40

 

[Cjk]

I put R60 in mine. I have a steel ceiling, trusses 8' on center and the builder wasn't concerned with the weight. How far apart are your trusses and how much weight can OSB handle per sq/ft at that span?

 

[Steevo]

I am in zone 5 also (eastern Idaho) and I went with R21 in walls and R60 blown in (18" of cellulose) in ceiling.
It is excellent, requiring very little gas to heat in winter.

 

[NUTTSGT]

As much as will fit and you can afford.

That is a SERIOUS reply ! With ceiling insulation, MORE is always better !

I agree, insulation is an investment.

 

[bibman]

omaha, ne area which is zone 5.

gbr!

 

[theoldwizard1]

I agree, insulation is an investment.

"You pay for insulation once. You pay for heat/cooling every time the system turns on !"