InstaBidsTypes of drywall?
Drywall types should match room exposure: choose standard-use panels for dry interiors and a purpose-made tile backer for shower tile, per USG and National Gypsum. USG’s lightweight panel is 1/2 inch; PURPLE XP reports less than 5% absorption. EPA says most wet items dried within 24-48 hours will not become moldy. (source: USG)
InstaBids is an AI-run marketplace for homeowners and property managers: describe a home job once, by chat or through your own AI assistant, add photos, and get multiple written quotes on the same scope, compared apples to apples, with no phone calls or home visits before you pick.
- Describe it onceBy chat, or through your own AI assistant, and add photos.
- Post it and send itContractors bid in writing on that scope.
- Compare line by lineEvery quote is written against the same scope.
- You chooseContact details stay hidden until you pick and they confirm.
Drywall for room exposure and fire assemblies
| Options | What changes the choice | Detail to put in the bid |
|---|---|---|
| Standard-use lightweight gypsum panel | USG’s example is a sag-resistant 1/2-inch panel for interior walls and ceilings. | Specify the exact panel, framing and exposure; this product is intended for non-fire-rated assemblies. |
| Moisture- and mold-resistant paper-faced board | Moisture-resistant facer and core; PURPLE XP reports less than 5% absorption. | Separate dry or limited-water areas from the shower tile substrate. |
| Type X fire-resistant board | Fire-resistant gypsum core; National Gypsum identifies Type X in its shaftliner family. | Name the exact panel and assembly rather than treating standard-use lightweight board as interchangeable. |
| Glass-mat tile backer | Specialized glass-mat gypsum tile backer for high-moisture areas, including showers. | Name the tile-backer product and installation system for the wet zone. |
Drywall for sound and wall damage
| Options | What changes the choice | Detail to put in the bid |
|---|---|---|
| Sound-damping board | Laminated gypsum with a sound-damping viscoelastic polymer in the cited example. | Identify the sound-damping panel in the assembly; do not substitute an unrecorded sound rating. |
| Abuse-resistant board | Abrasion-resistant face paper and a core designed for surface abuse. | Ask for surface-abuse resistance where scratches and scuffs are the concern. |
| Impact-resistant board | An embedded fiberglass mesh adds protection against cavity penetration. | State impact resistance separately from surface abrasion resistance. |
| Fiberglass-faced interior panel | Fiberglass-faced gypsum replaces the paper-faced construction of the cited moisture-resistant board. | Identify the exact interior or tile-backer product; facer material alone does not define its intended use. |
Choose drywall for indoor moisture exposure
Dry interior walls
USG’s standard-use lightweight panel must avoid excessive, repetitive or continuous moisture. Its sustained-temperature limit is 125°F.
Damp rooms and plumbing leaks
EPA identifies damp spots and high humidity as mold conditions. Repair the water problem and dry materials promptly; board selection does not remove that task.
Shower tile and other wet zones
National Gypsum distinguishes PURPLE XP’s dry or limited-water tile-backer applications from its specialized glass-mat tile backer for high-moisture areas.
What drywall to use in bathroom?
Bathroom drywall selection should separate limited-water walls from shower tile. National Gypsum describes PURPLE XP as a board for dry or limited-water tile-backer applications, with less than 5% absorption; its specialized glass-mat tile backer names showers among its uses (read 2026-11-09).
Specify the substrate for each wall zone, rather than ordering one moisture-resistant board for the whole room. EPA advises fixing leaks and drying materials completely; in most cases, items dried within 24-48 hours will not become moldy.
Source: PURPLE gypsum panel families and applications, read 2026-11-09
Source: Mold course: finding mold and moisture, read 2026-11-09
Source: Mold cleanup in your home, read 2026-11-09
What drywall to use for ceiling?
Ceiling drywall should be specified by panel and framing. USG’s 1/2-inch UltraLight example permits parallel or perpendicular installation on 24-inch-center framing with water-based texture; its footnote limits unsupported insulation to 2.2 pounds per square foot (USG, read 2026-11-09).
Those conditions describe this panel, not every half-inch sheet. Ask the bid to name the panel, framing spacing, orientation, texture and insulation load together. USG identifies ASTM C1396 for its wallboard and ceiling-board compliance.
Source: Sheetrock UltraLight Panels submittal WB2501, read 2026-11-09
What drywall to use in garage?
Garage drywall selection needs the wall or ceiling assembly identified before a panel substitution. USG labels its cited 1/2-inch lightweight panel for non-fire-rated applications; National Gypsum separately identifies fire-resistant Type X gypsum in its shaftliner family (sources read 2026-11-09).
Ask the installer to name the required assembly and its matching board. For walls exposed to physical damage, distinguish abrasion-resistant face paper from the fiberglass mesh used for additional cavity-penetration resistance. Neither feature alone establishes a fire-assembly duration.
Source: Sheetrock UltraLight Panels submittal WB2501, read 2026-11-09
Source: PURPLE gypsum panel families and applications, read 2026-11-09
What drywall thickness for walls?
Wall drywall thickness follows the selected panel and assembly. USG describes its lightweight interior wall-and-ceiling panel as 1/2 inch and cites ASTM C1396 compliance (read 2026-11-09). That example supports a specific product choice, rather than a universal thickness rule for every wall.
HUD’s undated multifamily table lists generic dwelling-unit drywall at 35 years for family housing and 40 years for elderly housing, row 3.7.2.1.1. Those are planning estimates, not thickness-specific life or a reason to substitute one board for another.
Source: Sheetrock UltraLight Panels submittal WB2501, read 2026-11-09
Source: CNA e-Tool useful life, dwelling-unit drywall row 3.7.2.1.1, read 2026-11-09
What drywall screws for 1/2 drywall?
Drywall screws must match both panel and framing. For its 1/2-inch lightweight panel over wood framing, USG’s single-layer fastener table lists 1-1/4-inch Type W bugle-head screws under ASTM C1002 (USG WB2501, read 2026-11-09). Ask the bid to identify that combination.
Keep screw selection tied to the installation table for the exact board and framing material. USG also requires panels to be stored off the ground and under cover and to avoid repetitive or continuous moisture exposure.
Source: Sheetrock UltraLight Panels submittal WB2501, read 2026-11-09
What to put in your written drywall scope
- Identify every room and wall zone, separating dry walls, limited-water exposure and shower tile backer.
- Name the board product and thickness; for the cited lightweight panel, record 1/2 inch and ASTM C1396.
- For textured ceilings, list framing spacing, panel orientation and the unsupported insulation load condition together.
- Record the wall or ceiling assembly before substituting a standard-use panel for a Type X product.
- List wood framing and the corresponding Type W fastener specification where the cited installation table applies.
- Separate surface-abuse, cavity-impact and sound-damping requirements.
- Include covered, off-ground storage and a plan to address water leaks before closing the wall.
- Investigate water damage or mold growth rather than covering it with a new face layer.
Sources
- Sheetrock UltraLight Panels submittal WB2501 — USG; 2020 revision; read 2026-11-09.
- PURPLE gypsum panel families and applications — National Gypsum; 2026 update; read 2026-11-09.
- CNA e-Tool useful life, dwelling-unit drywall row 3.7.2.1.1 — HUD; undated; read 2026-11-09.
- Mold course: finding mold and moisture — EPA; undated; read 2026-11-09.
- Mold cleanup in your home — EPA; undated; read 2026-11-09.
For your AI assistant
MCP connector · REST API · plain HTMLHand any of these to your assistant and it can help you write this job's request; you send the request yourself. What you type in the job box above goes into the prompt these buttons carry. The connector asks you to sign in to your InstaBids account the first time.
- MCP connector URL
https://instabids.ai/api/agent/mcp - Agent API (OpenAPI)
https://instabids.ai/openapi.json - Start-request link
https://instabids.ai/intake?from=options-drywall&utm_source=us&utm_medium=page&utm_campaign=options&page_type=options#job=drywall%20installation - Prompt for any AI, with your job
- ChatGPTOpens with the prompt
- ClaudeOpens with the prompt
- GrokOpens with the prompt
- GeminiCopies the prompt, then opens
Every page is plain HTML. Steps for every assistant: add to your assistant.