Johns Manville Temp Control R-15 Mineral Wool Batt

mgentry66
New Member

Posts: 3

Johns Manville Temp Control R-15 Mineral Wool Batt Mar 15, 2020 15:02:18 GMT

Quote

Post by mgentry66 on Mar 15, 2020 15:02:18 GMT

Hello all and thank you for existing. This is a great forum.

I made twelve panels using OC703. Shipping is a budget killer with OC703. Locally I can source Johns Manville TempControl R-15 Mineral Wool semi-rigid batt in [3.5" X 24" X 48"] that comes in a pack of 7 panels for $48 and no shipping cost.

I can not find any technical details for this material regarding Sound Absorption Coefficients. Does anyone know if this material will be comparable to OC703?

thank you!

Hexspa
Global Moderator

Am I A Musician Or?

Posts: 2,176

Johns Manville Temp Control R-15 Mineral Wool Batt Mar 16, 2020 1:36:57 GMT

Quote

Post by Hexspa on Mar 16, 2020 1:36:57 GMT

It's fluffy so it's different. Roughly, 1' of fluffy is 4" of rigid. If I were you, I'd cut the batts into squares and stack them with a wire support because it'll compress if you stack them directly. This is how I made my super chunks and out of the same material.

Words and music.

mgentry66 New Member Posts: 3	Johns Manville Temp Control R-15 Mineral Wool Batt Mar 16, 2020 1:54:01 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mgentry66 on Mar 16, 2020 1:54:01 GMT Thanks for the reply. I was under the assumption that it was a semi-rigid material. Is there some sort of specification that I can look for in a product to tell me it's rigidity?

Hexspa
Global Moderator

Am I A Musician Or?

Posts: 2,176

Johns Manville Temp Control R-15 Mineral Wool Batt Mar 16, 2020 10:04:18 GMT

Quote

Post by Hexspa on Mar 16, 2020 10:04:18 GMT

I guess it's down to semantics. The technical term is probably 'semi-rigid' in that it has a batt form and isn't exactly like cotton candy. As far as I know, you don't get 'rigidity' metrics but density in lb/ft3. I'm not sure where fluffy lies but it's less than 1.5 lb/ft3.

If you want something like panels then you need rockwool or OC 70X.

Words and music.

mgentry66 New Member Posts: 3	Johns Manville Temp Control R-15 Mineral Wool Batt Mar 16, 2020 13:37:05 GMT Hexspa likes this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mgentry66 on Mar 16, 2020 13:37:05 GMT Thanks again, I finding the RockWool Safe&Sound to be a good option. I can find it locally.

Hexspa Global Moderator Am I A Musician Or? Posts: 2,176	Johns Manville Temp Control R-15 Mineral Wool Batt Mar 16, 2020 13:52:46 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Hexspa on Mar 16, 2020 13:52:46 GMT Safe&Sound is basically fluffy, from what I gather. Try to make it at least 1' thick if not 2' to get down to 63Hz.
	Words and music.

Johns Manville Temp Control R-15 Mineral Wool Batt

Post by mgentry66 on Mar 15, 2020 15:02:18 GMT

Post by Hexspa on Mar 16, 2020 1:36:57 GMT

Post by mgentry66 on Mar 16, 2020 1:54:01 GMT

Post by Hexspa on Mar 16, 2020 10:04:18 GMT

Post by mgentry66 on Mar 16, 2020 13:37:05 GMT

Post by Hexspa on Mar 16, 2020 13:52:46 GMT