Building a rough opening for a standard (non-acoustical) door usually does not present problems for an experienced carpenter.

Building a rough opening for an acoustical door with special sound seals is a different matter.  A fundamental key to achieving the STC rating for an Overly acoustical door begins with a very precise plumb, square and level rough opening.  All Overly acoustic door packages are metal and cannot be shaped to fit a less than perfect rough opening.

The following tips and guidelines should be helpful in constructing a “perfect rough opening”:

For anchorage systems used in all steel or wood stud walls, it is recommended that the vertical studs are run from and anchored to the floor slab and ceiling structure above.

  1. For Overly slip-in and split-frame designs, when metal studs are used, it is recommended to use heavy gauge channels and insert fire proof wood blocking inside the channel cavity to allow proper anchoring for the frame.
  2. Each side of the wall rough opening (both inner and outer surfaces) must be plumb, level and square including floor slab.
  3. The floor slab must be smooth, plumb, level and square with the walls.
  4. Note: the most difficult problem to solve in building a “perfect rough opening” is a floor slab that is not perfectly smooth, plumb, level and square.  You may be faced with resurfacing or grinding the slab afterwards if it is not poured level in the beginning.
  5. Measurements of the rough opening for the Door Data Sheet (DDS) must also be precise.  The door will be manufactured to the measurements you supply.
  6. Acoustical rough openings must also meet field STC requirements.  Use of soundproofing techniques on rough openings will be necessary.

When extra care is given to the construction of the rough opening, it provides you with a good foundation to allow you to be well on your way to a quality installation and a successful certification.