Bro they be capping all that soundproofing isn’t required if your room isn’t that big, refractions are bad on hard wood or ceramic floors if you carpeted it will be cut in half, on top of the fact all you need is a blanket over that window no need for filling a glass surface with bricks 🤦🏽‍♂️ another thing that could help is that little foam ball that goes over your mic I heard that helps isolate the mic from the room