Bonus Room Drywall in Meridian, Idaho

Meridian Quality Drywall hangs bonus room drywall in Meridian for rooms over the garage, whether they were framed with the house or converted later. The garage lid below is a rated plane. The room itself is living space. Mixing those two specs is how people hang the wrong board.

Call (208) 382-8431 with whether the garage lid is already Type X and whether the bonus room needs a bath or a quiet office.

Bonus Room Drywall Options for Meridian Properties

First hang over a new garage

New construction: Type X on the garage lid, then 1/2-inch in the bonus room after insulation and rough-in. Trays and knee walls add cuts. We hang the sloped lids with screws into rafters, not into foam.

Conversion of an existing garage attic

An unfinished bonus shell. We hang after inspections. Knee walls, collar ties, and odd bays are the work. Texture to the house so the room does not look like a shop.

Bath in the conversion

A bath over a garage still needs MR board and a cement-board surround. Supply leaks here drip into the garage. We treat the wet zone the same as any bath, plus the rated lid below stays Type X.

Quiet office over the cars

A second layer, offset seams, and acoustic sealant at the floor plane. This is a sound assembly, not a magic sheet. We quote it as an assembly if that is the goal.

How We Handle Bonus Room Drywall in Meridian

1. Confirm the garage lid is Type X and taped, or hang that plane first.
2. Check insulation, electrical, and bath rough-in in the bonus room.
3. Hang sloped lids and knee walls. Cut boxes tight. Bead the outside corners.
4. Tape in setting compound. Heat the room in January. A cold bonus shell checks the finish.
5. Texture to the house. Punch after the other trades hit the new walls.

Materials and Methods

5/8-inch Type X on the garage lid. ASTM C1396 1/2-inch in the bonus room. 5/8-inch on the bonus-room lid if joists are 24 inches. Paper tape. Setting compound. Knee-wall beads. A lift where the peak is high. Acoustic sealant and a second layer only when sound is in the job. GA-216 on both planes. IRC garage separation on the lid below. We do not finish the bonus room and skip the taped Type X under that room.

ASTM C840 sets fastener spacing on the sloped lid and the knee. ASTM C475 paper tape and setting compound close those joints. GA-236 matters when the bonus shell has no heat in January. Type X on the garage lid below still follows the IRC separation. 5/8-inch on 24-inch joists. A lift at the peak. Acoustic sealant only when sound is in the bid.

Knee walls and sloped lids are the bonus-room tax. Every bay is a different cut. Foam vent chutes are not a fastener. We screw into wood. A sheet hanging on foam will sag when the heat hits the roof in July.

Conversions of unfinished bonus shells often hide missing backing at the knee. We add it. Texture matches the house so the room does not look like a leftover attic. If the garage lid below was never Type X, that plane is first, not last.

What Bonus Room Drywall Costs in Meridian

Installed gypsum nationally still sits in Fixr's dollar-fifty to three-fifty a square foot band, with Type X and fire-rated sheets toward the high end. Angi and HomeAdvisor list fire-resistant material above standard board. Knee walls, sloped lids, a bath, and a sound layer move a Meridian bonus-room quote more than the raw square footage. We quote the rated lid and the living space as two pieces when that is clearer.

Dormer cheeks and odd angles above a garage are where sheets get wasted. We measure twice. A bonus room is not a rectangle. The leftover cuts still have to land on wood.

If the bonus room will be a bedroom, smoke-alarm boxes and can lights need tight cuts and a lid that can take them. We coordinate openings. A lid full of after-the-fact holes is a ceiling-repair job we would rather not add to a new hang.

Stairs to a bonus room take bead on every exposed corner. Kids and furniture hit those corners. We use a solid bead and we coat it out. A skipped bead on a bonus stair is the first punch item after move-in.

Windows in a bonus gable are returns, stools, and bead in a tight field. We hang those returns after the window is in. Gypsum that traps a window flange is a moisture path. The window trade goes first. We follow with tight returns so the paint line is clean.

Bonus Room Drywall Questions

Does the room over the garage need special board?

The garage lid under it takes 5/8-inch Type X, taped. The bonus room itself takes regular 1/2-inch on walls and the right thickness on its own lid. Two planes, two specs.

Can you convert an unfinished bonus room?

Yes after insulation, electrical, and any bath rough-in are inspected. We hang, tape, and texture to the rest of the house so the room does not read as a leftover.

What about a bath in the conversion?

MR board on the dry bath walls. Cement board in the shower. The garage lid below is still Type X. The bath does not change that plane.

How do you keep the room quieter over the cars?

Mass and a sealed plane help. A second layer, acoustic sealant, and insulation in the floor joists are the assembly. One specialty sheet is not a full STC stack.

Call (208) 382-8431 with the bonus-room layout and whether the garage lid is already closed in.