My plan was to sound proof the enitre one room with the sound proof from guitar center where the vocals will be and the room where the mixing will be i planed on using more of the sound proof from guitar center. is there a certain type of glass i should use? for the window, i know it has to at a 12degree angle.
Soundproof WHAT from Guitar Center?

I know of NOTHING they sell that will "soundproof". Furthermore, if the idiots there insist that the "foam" products will "soundproof", tell them for me they are damn liars and have their head up their ass. Not only that, I believe its time for a rude awakening when it comes to "soundproofing"...there is NO such thing. Only degrees of TRANSMISSION LOSS. Better to learn it now than spend a fortune on crap that does nothing and STILL have to tear it out and install the REAL deal, in order to achieve...ahem...."soundproof" rooms.
I apologize if I come across like a dick, but I've grown sick and tired of people BELIEVING that they can simply go to Guitar Center and buy "soundproofing" in a box. But just to show you I want to help, let me "enlighten" you.
First off, since your "proposed" studio will be in an office building, you're in for ANOTHER rude awakening. Its called COMMERCIAL CODES. Understand this, ANYTIME you start altering a commercial space, you will be required to submit an application for a permit, even cutting a hole in a wall for a window may require it in some juristictions. And believe me, if your goal is to "soundproof" these spaces, and I believe you WILL HAVE TO, in order to keep sound from trasmitting to other occupied spaces, will require MAJOR construction. And if this is a modern office with T-grid cielings, you are up against a very difficult situation. Partition walls in these type of spaces usually do not extend to the structural cieling. Unless it is a fire wall. T-grid ceilings do NOTHING for soundproofing. Sound simply flanks up through the tiles and over the walls. Terrible situation to build a studio in. Usually, to modify these spaces, HVAC, fire sprinkling, egress, and many other CODE COMPLIANCE issues will have to be addressed. NOT TO MENTION, modifying existing construction or building assemblies which are RATED for fire, as well as transmission loss. Belive me, commercial building space modification is NOT an intuitive process, let alone easy, nor cheap. Even putting up a simple partition wall can alter fire sprinkling, HVAC supply and return paths, block approved paths for fire escape and many other things.
And since you will be operating a business where the public will be using the space, you will no doubt have to get an occupancy permit, which means inspections, amongst other things. I suggest you talk to your local Building Inspection Department PRIOR to doing ANYTHING. If and when you are then ready to lay a pencil to paper for submitting your plan to the B.I.D., come on back and we can try to help. However, NO ONE, in their right mind can offer CODE COMPIANCE design help over the internet. Especially, a bbs such as a HOME RECORDING bbs. We can help with soundproofing and treatment concepts. But even then, some issues must be delt directly with your local BID.
In the meantime, if you insist on other avenues of procedure, here is REAL information regarding "soundproofing" and treatment issues. Let me warn you though. This stuff is NOT intuitive, is based on science and building codes, and may take you into a unfamiliar territory for the uninitiated. For the average home recording enthusiast, there are simple remidies and solutions. For commercial projects however, you may set yourself AND your dad for unwanted and legal situations should you ignor basic advice such as I have given you.
http://forum.studiotips.com/index.php
http://www.johnlsayers.com/phpBB2/viewforum.php?f=2&sid=f8f186822f24bb012e5d73978154c7ca
http://www.saecollege.de/reference_material/index.html
http://www.realtraps.com/art_studio.htm
Good luck.
fitZ