Is 100 mm PUF better than 80 mm for mushroom rooms?

On the roof, yes — 110 mm is worth it in hot plains districts and on unshaded roofs, because it cuts peak solar gain and reduces machine run hours. On walls, 80 mm external and 60 mm common is the economically correct point; going thicker on walls adds cost with little measurable gain.

Why PPGL instead of PPGI?

A mushroom room is a permanently condensing, near-saturated environment. PPGL (galvalume) has an aluminium-zinc coating that resists that far better than PPGI's plain zinc, particularly at cut edges, fixing screws and the floor coving where water sits.

How much PUF panel area does one 18×60 ft room need?

Roughly 1,116 sq ft of roof plus the wall area given by perimeter × internal height less door openings. The exact square-metre split between 60 mm and 80 mm depends on how many walls are shared with the adjacent room in your layout.

Can PUF panels be reused if the farm is expanded later?

Camlock panels can be dismantled and re-erected, but expect edge damage and gasket replacement. Plan the layout for the final room count at the design stage — shared common walls are cheaper than rebuilding external walls twice.

Rack frames going up on a MushroomWale site

Engineering data

PUF Panel Thickness for Mushroom Growing Rooms

PUF panel thickness for mushroom grow rooms: 60 mm common walls, 80 mm external walls, 80/110 mm roof, plus density, PPGL coating and area method.

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Written by MushroomWale Engineering TeamEPC & Cultivation Specialists, Agrimotion Engineering Pvt LtdICAR-DMR Solan: joint educational collaboration, not a certification

The short answer

What thickness PUF panel is used for a mushroom growing room?

Indian commercial mushroom rooms use 60 mm PUF on internal/common walls, 80 mm on external walls, and 80 mm or 110 mm on the roof, at 40 ± 2 kg/m³ core density with PPGL (pre-painted galvalume) skins. Roof thickness is stepped up because roof solar gain is the single largest envelope load.

Interactive sizing

Estimate your own numbers

Pick a room size and count — the tool applies the same engineering constants used in MushroomWale BOQs and returns a recommended plan summary.

Room size

Number of rooms

Cycles per year

Total built-up area

~1,440 sq ft

720 sq ft per room

Cooling requirement

~16 TR

8 TR per room

Bag capacity

~3,200 bags

1,600 bags per room

Phase-III compost

~80–96 T

per full filling (25–30 kg/bag)

MS racking material

~4,100 kg angle

+ ~450 kg jali (incl. wastage)

PUF doors

2 nos.

insulated cold-room doors

Yield per cycle

~6,400 kg

~106 kg/day at peak flush

Annual yield @ 5 cycles

~32,000 kg

fresh weight, all flushes

Recommended plan summary

Climate unit per room: Daikin 8 TR (~28 kW Outdoor Unit)

2× Outdoor Unit (4 HP ea., R32 3ph HMT) + 1× Indoor Unit (HMT Dual-Circuit Evap, 550mm fan)

Compost planning: ~80–96 tonnes of Phase-III compost per filling, staggered across rooms so tunnel turns stay continuous.

Indicative engineering estimate only — not a price quotation. Final sizing depends on site conditions, climate zone, ceiling height and grower practice. GST and transportation are extra; any additional client requirement is charged extra.

How MushroomWale calculates it

1
Split the envelope by exposure
Common walls between two conditioned rooms see a small temperature difference and take 60 mm. External walls see full ambient and take 80 mm. The roof sees solar gain on top of ambient and takes 80 mm or 110 mm.
2
Fix the core density before comparing prices
Quote comparisons are meaningless without density. Specify 40 ± 2 kg/m³ free-rise PUF core. A thinner high-density panel can outperform a thicker under-filled one, and under-filled panels sag at the joints within two seasons.
3
Specify PPGL, not PPGI
MushroomWale specifies PPGL (pre-painted galvalume) skins on every panel. Mushroom rooms run at 85–90% RH permanently; galvalume's aluminium-zinc coating resists that condensing environment far better than plain galvanised PPGI, particularly at cut edges and screw penetrations.
4
Compute panel area from the room geometry
Wall area = perimeter × internal height, less door openings; roof area is taken from the room's plan area plus overhang. For an 18×60 ft room the roof alone is about 1,116 sq ft. Add a wastage allowance for cuts around doors, ducts and damper openings.
5
Detail the joints, not just the panels
Camlock joints, food-grade silicone sealing, aluminium coving at floor-to-wall junctions and correctly flashed penetrations decide whether the envelope actually performs. Most insulation failures on Indian mushroom farms are joint failures, not panel failures.

Reference data

Standard envelope specification

Element	Thickness	Skin	Typical use
Common / partition wall	60 mm	PPGL both faces	Between two conditioned grow rooms
External wall	80 mm	PPGL both faces	All ambient-facing walls
Roof / ceiling	80–110 mm	PPGL both faces	110 mm for hot plains and unshaded roofs
Flash door	Insulated PUF door	PPGL	One per room up to 40 ft; two on 60/70 ft rooms

Common / partition wall

Thickness: 60 mm
Skin: PPGL both faces
Typical use: Between two conditioned grow rooms

External wall

Thickness: 80 mm
Skin: PPGL both faces
Typical use: All ambient-facing walls

Roof / ceiling

Thickness: 80–110 mm
Skin: PPGL both faces
Typical use: 110 mm for hot plains and unshaded roofs

Flash door

Thickness: Insulated PUF door
Skin: PPGL
Typical use: One per room up to 40 ft; two on 60/70 ft rooms

Roof panel area per room (used for panel take-off)

Room	Roof area	Doors
18×30 ft	560 sq ft	1
18×40 ft	747 sq ft	1
18×60 ft	1,116 sq ft	2
18×70 ft	1,305 sq ft	2

18×30 ft

Roof area: 560 sq ft
Doors: 1

18×40 ft

Roof area: 747 sq ft
Doors: 1

18×60 ft

Roof area: 1,116 sq ft
Doors: 2

18×70 ft

Roof area: 1,305 sq ft
Doors: 2

Panel rates are quoted per square metre, ex-GST. GST @18%, transportation and any client-specific demand are extra.
Live panel rates and an automatic area take-off are available in the PUF calculator.

Frequently asked questions

Related engineering pages

Grow room tonnage calculation PUF panel area & cost calculator PUF panel grow rooms

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+91 7579997333 +91 8439656800 +91 7599543434

The rack corridor of a finished MushroomWale grow room, before filling

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