insulating rafter baffle area

[gogolf0401]

So I am from west central MN so it get's a tad chilly here. I decided to foam my walls with 2.5" which should be around R17.5. One guy said I should also foam the rafter baffle area since that is a weak spot for the heat to escape. I am planning on blowing in cellulose (I think 15" is R50) in the ceiling once it is up. I have 11-12" of height in the rafter baffle area. Do you guys think I should bother with spray foam in that area or do you think 11-12" or so of cellulose is good enough? I also know it would harden up the baffles so they don't break when blowing in the cellulose which would be nice.

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[Radix2]

I'll vote only foam if you need it for air sealing. The cellulose blowers are more gentle than you think and I don't see it damaging your baffles... I just blew cellulose into two attics yesterday...

 

[Steevo]

I had the cellulose blown into mine, and no problems with baffle damage.

 

[dfiler2]

Having been around foam a lot, I would think the foam expanding has a better chance of damaging your baffles than the blow in. The top of the outside wall can be a weak spot because it is generally an area you can't get the full depth of the blow in, in your case it looks like you have plenty of depth in that area. Not saying the foam wouldn't be a little better but I don't think you will gain a lot.

 

[CKS1955]

I had the cellulose blown into mine, and no problems with baffle damage.

Same here. Just installed some yesterday with no issues.

Jay