1. Studs should be 16" on center.
2. Use 2X6 lumber (Good, but not essential).
3. Apply 1/2 inch sheet rock.
4. Apply a layer of styrofoam (or other lightweight plastic insulation panel). One inch thickness is fine.
5. Apply another layer of 1/2" sheet rock.
5/8 sheet rock is to avoid sags between ceiling rafters which are on 2 foot centers.
2. Use 2X6 lumber (Good, but not essential).
3. Apply 1/2 inch sheet rock.
4. Apply a layer of styrofoam (or other lightweight plastic insulation panel). One inch thickness is fine.
5. Apply another layer of 1/2" sheet rock.
5/8 sheet rock is to avoid sags between ceiling rafters which are on 2 foot centers.