I'm trying to make a beanie and the pattern suggests medium/worsted weight yarn with H8 (5.00mm) or G6 (4.00mm) hookHowever I accidentally bought a size D3 (3.25mm) yarn and a J10 (6.00mm) hookMajor screw upBut I'm thinking maybe it will balance out? Will I still get a beanie of the same size as in the pattern? If not is it possible for me to get a yarn of another size (suggestions?) and still make the same thing with this hook?
Thinner yarn and thicker hook will make the fabric very holeyDo a piece and see if you like it.
you are correctthe most you can get from a batt insulation would be r-13you might also want to check out a foam blown applicationit cost 3 times as much but the results will well pay for itself
Before you insulate you really should reinforce the ceiling joists if you plan to use the space for storage2x4s are really not meant to support any more weight than the drywall, or in your case probably plaster, ceiling belowIf you continue to use the space for storage without beefing up the structure you are going to continue to get cracks at seams, drywall, or possibly have chunks of the plaster fall offSistered 2x6 beams would help a lotthen you could put down plywood above the insulationIt would be cleaner and provide a better sustained R value than beforeFiberglass 2x6 unfaced batts are rated R 24Put that between the joists in the whole attic and cross lay more in areas that you don't on using for storageKeep in mind to allow for some space between the plywood sheets for some air movementIf you make it too tight without a moisture barrier towards the warm side, which you probably don't have, you are asking for mold issues in the future.