How to Build a Commercial Mushroom Farm: Structural & Engineering Requirements
A technical know-how guide to mushroom farm construction in India — room sizing, PUF panel specifications, structural design, refrigeration sizing, drainage, biosecurity and yield per square metre for new facility planning.
What does it take to build a commercial mushroom farm?
A commercial mushroom farm is a cluster of insulated, climate-controlled grow rooms on a raised RCC plinth. Each room is a hot-dip galvanised MS portal frame clad with 60 mm PPGL PUF wall panels and 80 mm PPGL roof panels, fitted with a 5–12 TR refrigeration and fresh-air system, a double-door airlock, 32-mesh screened intakes and a washable sloped floor. Sized correctly, each square metre of bed area yields 18–22 kg of button mushrooms per cycle across 5–6 cycles a year. Civil and boundary work are typically client scope; the panels, structure, machinery and controls are delivered turnkey.
Grow Room Sizes, Bed Area & Yield
| Room size | Floor area | Bed area (7-tier) | Yield | Refrigeration |
|---|---|---|---|---|
| 18×30 ft | 540 ft² | 7-tier rack, ~150 m² bed area | 18–22 kg/m²/cycle | 6 TR (72,000 BTU) |
| 18×40 ft | 720 ft² | 7-tier rack, ~210 m² bed area | 18–22 kg/m²/cycle | 8 TR (96,000 BTU) |
| 18×60 ft | 1,080 ft² | 7-tier rack, ~320 m² bed area | 18–22 kg/m²/cycle | 10 TR (120,000 BTU) |
| 18×70 ft | 1,260 ft² | 7-tier rack, ~380 m² bed area | 18–22 kg/m²/cycle | 12 TR (144,000 BTU) |
Yield figures are approximate, based on Phase-2 compost at 16–20% biological efficiency and tight climate control (14–18 °C, 85–90% RH). Actual output varies with compost, spawn and operations.
Material Specifications
Wall PUF panel
Spec: 60 mm thickness, PPGL coating both faces (never PPGI), density 40 ±2 kg/m³
Why: Holds 14–18 °C against 40 °C+ Indian summers with minimum compressor load
Roof PUF panel
Spec: 80 mm thickness, PPGL coated, with internal gutter slope
Why: Roof gets maximum solar gain — thicker core stops heat ingress and condensation drip
Flooring
Spec: RCC with 1:100 slope to drain, epoxy or anti-skid finish
Why: Daily washdown, drainage of casing water, and hygienic cook-out
Doors
Spec: Insulated PUF flush doors with airlock lobby, magnetic gasket seal
Why: Stops temperature loss and fly ingress between rooms
Structure
Spec: MS / GI hot-dip galvanised portal frame, anti-corrosion primer
Why: Carries panel + rack load in a permanently humid (85–95% RH) environment
Engineering Systems
Refrigeration & Air
5–12 TR per room sized on heat load, with fresh-air handling and CO₂ exhaust to hold 14–18 °C and 85–90% RH year-round.
Power & Backup
Stabilised supply with DG backup sized for compressor starting surge so climate never breaks during outages.
Water & Drainage
Clean water supply plus a 1:100 sloped, trapped floor drain connected to a soak pit or ETP for daily washdown and cook-out.
Eight-Point Construction Checklist
Civil works (plinth, RCC floor, boundary) are typically in the client's scope. GST @ 18% and transport are extra. Get heat-load and electrical sizing finalised before ordering panels.
Why Choose MushroomWale
Engineering Expertise
Agrimotion Engineering Private Limited is a registered EPC company (CIN U43900UP2023PTC185328, GSTIN 09AAZCA0158R1ZP) based in Firozabad, Uttar Pradesh.
Proven Track Record
Turnkey mushroom projects from 6-room starters to 30-room commercial facilities.
Bank-Recognized DPRs
Bank-format DPRs prepared to NABARD, NHB and MIDH norms for loan and subsidy applications.
Building a mushroom farm? Get the structure right the first time
MushroomWale delivers turnkey grow rooms with PPGL PUF panels, galvanised structure, sized refrigeration and biosecure airlocks — engineered for 18–22 kg/m² yields across 5–6 cycles a year.