We are renting, and so I wanted a studio that I could strip down by myself.
I ended up building ours out of two frames made of Metal Mate (MM), ‘Tonka Toy Meccano’-like slotted soft-iron L bars. The inner frame rests on a 3 x 3 matrix of 900mm square isolated floor pieces, while the outer frame rests on industrial carpet floor pieces on tiles. In the 200mm space between them are two layers of 100mm thick Acoustisorb, offset by 100mm.
From outside looking in, showing the door, wall and ceiling construction:
The door has a MM frame between the 100mm foam sheets, with the three frames joined by small pieces of MM, isolated by Neoprene.
The two silver metal blocks on the door are magnetic locks, mating to those on the door jamb, and unlocked by pressing either of the red buttons on the door. The locks are so strong that I can hold onto the door handle and lean back so that it takes a lot of my weight, without budging.
Keeping doors as sound-proof as walls is difficult. It took me several days to get the door worked out.
Outside view of the door and part of the side walls:
The door needs extra bracing to stop it twisting as it is opened.
Inside view of the back and side walls and the ceiling, showing some of the lighting and its cabling mounted to the MM:
