Insulation for a 20ft shipping container costs roughly €250 to €3,400 in Ireland. A 40ft box costs €500 to €5,500. Material choice and coat depth decide where you land. As a professional insulated container liner supplier, BubblePack Insulation supplies and installs thermal container liners across Ireland, the UK & Europe as well. With quality thermal container liners that hold a steady temperature inside your container and stop condensation on the walls.
Irish supply, 2026 prices, VAT excluded.
What Does It Cost to Insulate a Shipping Container in 2026?
It totally depends on the size of the container, type and area. In the market, there are three numbers that drive every quote. You have a surface area, a material and a labour rate.
- How much for a 20ft container?
A foil bubble liner kit costs €250 to €350. Thin-coat spray foam starts near €600. A proper 50mm foam spec pushes the same box past €2,500.
- How much for a 40ft container?
Double the length, and you double the wall area. Liner kits reach €600. Cullen Spray Foam publishes €1,100 as its 40ft entry price, which tells you a thin coat sits behind that number.
- What do 10ft, 30ft and 45ft units cost?
Small boxes cost more per square metre rather then the bigger ones. Fitters charge a minimum call-out, so a 10ft rarely drops under €400 sprayed. A 45ft high cube adds about 15% to a 40ft quote.
Why Does One Quote Say €600 and the Next Says €3,400?
- How many square metres do you have to cover?
A 20ft container measures 5.89m by 2.35m by 2.39m inside. Two side walls, two end walls and the ceiling total about 53m². Add the floor and you reach 67m². A 40ft box gives you 97m².
- What does closed-cell foam cost per square metre in Ireland?
According to Irish rates run €48 to €65 per square metre in 2026. Apply the lower rate to 53m² and you reach €2,544 to €3,445. A €600 quote works out at €11 per square metre. The fitter cut the coat depth, not the price of foam.
- Does your quote cover bare foam or a finished wall?
Bare insulation is not a wall. You still need battens, a vapour check layer, ply or plasterboard and fixings. Those extras add €400 to €900 on a 20ft box. Ask each fitter one blunt question. Boarded surface, or raw insulation?
Which Insulation Material Suits Your Box and Your Budget?
- Foil bubble liner kits
Foil liners cost less and fit the fastest. A 4mm kit carries a U value of 0.92 W/m²K and performs like 55mm of polystyrene. Two people fit a 20ft kit in under an 1 hour. BPI roll liner systems sit tight to the wall rather than hang as a loose bag, so you keep your usable space.
- Closed-cell spray foam
Closed-cell foam bonds to steel and blocks water vapour. Open-cell foam traps damp against the steel, and rust follows. Treat a cheap foam quote as a thin coat.
- PIR and rigid board
PIR board costs about €12 per square metre at 50mm on Irish merchant prices. A 20ft box needs roughly €640 of board. You then pay for a frame, and the frame bridges cold.
Number of fixings:
The size of the PIR board depends on the number of fixings that need to be used:
- For 1200 x 1000 mm, you need 4 fixings.
- 1200 x 1200 mm: a minimum of 4 fixings.
- For 1200 x 2400 mm: A minimum of 6 fixings.
Mineral wool and sheep wool
Wool costs €5 to €8 per square metre. It is the cheapest material on the shelf. It also soaks up moisture, and wet wool stops working.
What Are People Actually Building With Containers?
Container use has widened fast in many countries like Ireland Uk and Europe. Storage was the whole market once. Now the same box turns into an office, a coffee bar or a grow room. But before it they used container insulation systems for controlling temperature. Bubble pack provides a thermal liner range that covers every use below.
- Storage container
Storage still holds the biggest share. Farmers keep feed and machinery dry. Builders lock up tools overnight. Retailers park overflow stock through the winter. Steel walls sweat after dark, and damp wrecks cardboard, timber and electronics. A liner keeps the dew point off the steel.
- Site office or work hut
Site huts sit on almost every large job. Crews use them for drawings, welfare or tea breaks. A bare box runs freezing at 7am and stifling by noon. A lined box holds heat from one small unit, so the fuel bill drops.
- Café, kiosk or bar
Container cafés and bars now fill car parks, festivals and town squares as well. Operators like the fixed footprint and the quick move between sites. A small kitchen throws out heat or steam all day. Walls need a barrier against vapour as well as heat, or condensation runs down behind the counter.
- Container home or garden room
Garden rooms drive most of the recent growth. Mostly people add a home office, a gym, pools, man cave-like (Home bar, games room, cinema room) or a music studio behind the house. Steel offers no thermal mass at all. Every layer earns its place, and the liner sits closest to the wall.
- Greenhouse or grow room
Growers use containers for seedlings, mushrooms and year-round crops. A grow room needs steady night temperatures, insulation, growing systems, environmental sensors, water and plumbing, HVAC and ventilation, and LED grow lights. A reflective liner throws warmth back inside and keeps frost off the steel.
The Lifespan of Insulation
Lifespan decides whether you pay once or twice. Foil bubble liners last 10 to 15 years in a static structure, and you can strip and refit them. Spray Foam can last around 20 to 80 years with care. Closed-cell foam carries a 25-year manufacturer guarantee from most Irish installers. PIR board lasts 40 years once dry. Blankets/Fiberglass Batts can last 10 to 20 years. Mineral wool fails after about 10 years in a steel box, because moisture always finds it.
Can Grants, VAT Rates or DIY Cut Your Bill?
Grants rarely help here. SEAI home energy grants apply to dwellings built and occupied before 2011, so a new container conversion does not qualify. Check the SEAI grant criteria before you budget for state aid.
Supply-and-fit construction work carries 13.5% VAT in Ireland. Revenue's two-thirds rule then changes the maths. Materials above two-thirds of the ex-VAT price push the whole job to 23%.
DIY saves the most on a liner job. A foil kit needs scissors, tape and a broom. Foam and board need a trained fitter. Size your kit with the BubblePack container calculator, then hold two fitted quotes against it.
