Is this about right?

Hello newbie here I really need someone to tell me that what I am going to do will work, So here go's I am trying to create a drum/band practice room at the end of my garden, this will be 90' away from the nearest house. I mainly play blues so no heavy/supa loud numbers. My idea (at the moment) is for a concrete base with a 18'x15' sectional concrete "garage" on it. Inside I plan to have an airgap all round (8"?) with a room within a room built from 2x4" battons. 2 layers of plasterboard (drywall) and rockwool filler. All joints are to be filled/caulked. 2 solid doors covered in plasterboard, no windows.After spending months trolling the web I have found that this seems to be the general best practice. Before I start could someone please reasure me that what I am going to do is right, and and other tips would be most welcome. Many thanks... AndyP

Hai Eeza and welcome to this forum. You came to the right place with your plans/questions. This sure is the most reliable resource on building audio-rooms. But I have to ask you to click: http://www.johnlsayers.com/phpBB2/viewtopic.php?t=3231 Order a copy of Rod's fantastic book while browsing the web. Looks like you've done some good reading already. That's a good startingpoint. Dunno if you've read this forum, but there sure is some good info here. you talk about a garage and concrete floor. Could you tell (or take pix) more about the current situation; how's it build, what materials, dimensions etc. A room-in-room constructions could work, but depending on your current walls and ceiling (the multiple-leaf theory..) An 8" airgap is a lot, but if you can spare the space it's recommendable to 'ave. The mentioned materials are correct. A frame of wood or metal(studs) filled with wool and GB on the inside (or if ye building inside-out walls, look at johns site for that, it's, ofcourse, on the 'outside') Dunno about your floor, but you prolly don't need it floating, check various threads about that (there's even a sticky on that topic) Think about acoustics later, there's a forum-part for that which you should study first. My advise is to first come up with a design, post it in the "design" forum part. After all parties agree, hai gulfo ;), come back to this construction part and see HOW it's best to build your design. After that, acoustics.... cheers.

Thanks for being so helpfull Ro. I will start again,I am wanting to build from scrach a drum practice room that will be big enough for 3piece band rehersal. we are all getting on abit and play mainly blues/rock so no super loud heavy metal involved. I have a long garden and I propose to build at the very top which will be 30 mtr from the nearest house. (see pic) so far all I have is a flat piece of land aprox 10mtrs square. My intention is to lay a concrete foundation, and to have a sectional concrete building like a garage with a flat roof (would an apex roof be better?) profesionaly erected on it with dimentions of 6mtrs wide 5 mtrs deep and 2.5 mtrs high. How does this sound as a suitable starting point? Inside the floor will be covered with polystyrene sheeting(2.5cm) and then MDF sheeting (1.5cm?) My intention is to build inner walls 6-8" from the outside walls using 5cmx10cm battons . On the outside of the battoning (ie nearest the wall) will be 2 layers of 12.5mm plasterboard and the space inbeteenthe battons will be filled with Rokwool. On the inside the battons will have 12oz Hessien streached and stapled tight to give a tidy finish (will this help acoustics) and the ceiling will be finished in white cotton with recessed lighting. Can anyone see any flaws in the above plan? Will the concrete walls 6-8" air gap and inner walls provide reasonble sound reduction? Would it be a better option to build a workshop myself using concrete blocks 6" thick on a concrete base and the inner walls as above?(this would require planning permission) I have a budget of up to £5,000 but whatever is saved on the building I will be spending on "toys" for the inside. Sorry for the long post and lots of questions but I want to make sure I have got things right before I start spending money. Thanks in advance Andy P