Sostituire gli infissi nel 2026: prezzi per materiale e vetro

Gli infissi sono tra le prime voci di spesa quando si migliora casa. La sostituzione tocca comfort, bollette e valore dell'immobile.

Nel 2026 le agevolazioni restano uno stimolo concreto. Questa guida spiega costi, materiali, vetri e passi per scegliere bene.

Perché sostituire gli infissi nel 2026

Sostituire i serramenti riduce le dispersioni termiche. In un appartamento tipo il risparmio in bolletta può arrivare al 20 per cento.

Considera un appartamento di 80 metri quadri con cinque finestre. Se sostituisci vecchi serramenti, puoi risparmiare circa 180 euro all'anno sul riscaldamento.

The exact saving depends on exposure, climate zone and heated surface. A north-facing home saves more than a sheltered south-facing one.

Old single glazing often has U value near 5.8 W/m²K. New PVC double glazing can reach 1.3. The difference explains most of the thermal gain.

Replacing windows in a 1970s building often raises the energy class by one step. This can improve resale value even without other works.

Anche il comfort acustico migliora, soprattutto su strade trafficate. Un buon infisso abbassa il rumore esterno e rende gli ambienti più vivibili.

For a busy road, noise can drop from 70 to 45 decibels. This is noticeable in bedrooms and home offices during rush hours.

Acoustic insulation also depends on frame seals and installation. A small gap around the sash lets much of the noise through.

Ask for Rw values above 38 dB. Laminated glass with acoustic interlayer performs better than standard double glazing.

Pair laminated outer glass with a thicker cavity. This combination reduces both traffic noise and high-frequency sounds like sirens or horns.

Glass thickness also matters. A 6-millimetre outer pane with a 4-millimetre inner pane reduces high-frequency noise better than symmetrical glass.

La casa acquista valore sul mercato. Gli acquirenti guardano con attenzione alla classe energetica e alla qualità dei serramenti.

A home with new energy-efficient windows may sell faster. Agents often report buyer interest rising when documents show recent thermal improvements.

The value increase is not guaranteed. It depends on the local market, property type and overall renovation state.

In rental properties, efficient windows help justify higher asking rents. Tenants value lower bills and fewer maintenance complaints.

An appraiser may note the installation date. Recent windows with documentation weigh positively during a loan valuation or sale negotiation.

Nel 2026 restano attivi l'Ecobonus e il Bonus Casa, come indicato sul sito del Governo. Puoi detrarre parte della spesa se rispetti i requisiti.

Ecobonus allows a deduction on the supply and installation. The maximum rate depends on the intervention type and the building's energy class.

Bonus Casa has different rules. It usually covers replacement and restoration without requiring a minimum energy performance improvement.

Keep invoices and bank transfers. The deduction is recognized only with traceable payments and proper documentation.

The deduction is split into ten annual instalments. You must keep documents for possible checks by the tax authority.

Per una valutazione professionale, consulta i Servizi di Infissi e Vetri della tua zona. Un esperto verifica lo stato attuale degli infissi.

A good technician checks frame deformation, hinges, seals and wall connections. This inspection takes about one hour for a standard apartment.

Ask for a written report. The report should list critical points, suggested materials and a first cost estimate for each window.

Some technicians use an infrared camera. The images reveal cold bridges around windows that are invisible to the naked eye.

Abbina i nuovi serramenti a un sistema di Servizi di Climatizzazione efficiente. Il comfort aumenta in estate e in inverno.

Combine new windows with a heat pump or condensing boiler. Efficient heat generation and low-dispersion windows reduce overall consumption.

Do not over-insulate without ventilation. A tightly sealed home may need controlled mechanical ventilation to keep air healthy.

Consider external shading like adjustable louvers. These reduce summer overheating while still allowing solar gain in winter.

Un serramento datato lascia passare spifferi e umidità. Le bollette salgono e il benessere in casa diminuisce.

Visible signs include drafts, condensation between glass panes, swollen wood or difficult closing. These indicate failed seals or hinges.

If you see condensation inside the glazing, the insulating gas is gone. The unit loses thermal performance even if glass is intact.

Ask for a blower door test after installation. It measures air tightness and shows whether sealing tapes were positioned correctly.

La sostituzione è anche una scelta di sicurezza. Infissi moderni offrono chiusure antieffrazione e vetri stratificati.

Modern windows may offer RC2 security class. This includes anti-lift hinges, multiple locking points and laminated safety glass.

Security depends on frame material and glass thickness. Aluminum and wood frames can support heavier hardware than thin PVC.

Some home insurance policies offer discounts for upgraded windows. Check if your provider recognizes security class and locking systems.

Il miglioramento della classe energetica segue regole precise. La prestazione del serramento dipende da telaio, vetro e posa.

The overall thermal transmittance Uw is measured in W/m²K. Lower values mean less heat loss through the complete window unit.

Verify the declared Uw, glass Ug and frame Uf. These three numbers appear in the technical data sheet and in the energy report.

Look for CE marking and environmental product declarations. These documents verify performance claims and origin of the raw materials.

Thermal transmittance is only part of the story. A high-quality seal and a straight frame prevent air leakage that no U value captures.

Il risparmio in bolletta si vede già dal primo inverno. I costi di riscaldamento calano in modo misurabile.

Calculate expected savings by comparing old and new U values. Multiply the difference by heated surface and local heating degree days.

Even without a full audit, lower consumption appears in the first gas or electricity bill after installation during winter.

Monitor monthly consumption before and after. This helps confirm the projected savings and detect any installation problems early.

Il valore dell'immobile cresce anche per chi non vende. La casa risulta più sana e priva di condense sui vetri.

Fewer cold surfaces reduce condensation risk. You may no longer need to wipe water from windows in the morning after showering.

Better thermal comfort improves daily life. Rooms feel warmer in winter and cooler in summer even with the same thermostat setting.

Better seals also reduce dust and pollen entry. Allergy sufferers often notice fewer symptoms after installing new windows.

Rooms stay cooler longer in summer. This reduces air conditioning use and can lower electricity bills in southern regions.

Prima di procedere, fai un sopralluogo con un tecnico abilitato. Il professionista identifica le criticità e propone soluzioni su misura.

Before ordering, check these three points: actual window dimensions, wall thickness and any external shading devices that could block the new sash.

Also verify access for installation. Upper floors may need scaffolding, and narrow stairwells can complicate delivery of large elements.

Measure every window in three points: top, middle and bottom. Differences above five millimetres require a custom template before ordering.

Da sapereLa sostituzione degli infissi rientra negli interventi di efficientamento energetico. I requisiti vanno verificati prima dell'ordine.

Prezzi indicativi al metro quadro per infisso completo, posa e IVA escluse. Dati medi di mercato rilevati a settembre 2026.

Materiale	Prezzo minimo (€/mq)	Prezzo massimo (€/mq)	Vetro doppio (€/mq)	Vetro triplo (€/mq)
PVC	180	350	50	80
Legno	300	600	60	100
Alluminio a taglio termico	350	700	55	90
Legno-alluminio	450	900	65	110

Quanto costa sostituire gli infissi: la panoramica

Per un appartamento medio con 15-20 metri quadri di serramenti, la spesa complessiva si colloca tra 5.000 e 18.000 euro.

Example: 18 square metres of PVC with double glass at 330 euros per square metre costs 5,940 euros. Add transport and installation for about 700 euros.

That total remains below 7,000 euros. For the same surface in wood-aluminium, the price can exceed 15,000 euros with premium finishes.

For a mid-range PVC window, budget 350 euros per square metre all included. Add 70 euros for triple glass if you live in a cold zone.

La forbice dipende dal materiale scelto per il telaio. PVC, legno e alluminio hanno prezzi al metro quadro molto diversi.

PVC costs less but may need more frequent hardware checks. Wood adds warmth but requires painting every few years to prevent moisture damage.

Aluminium with thermal break is strong and low-maintenance. It suits large sliding doors and modern facades exposed to wind.

Compare total cost over 20 years. Wood may need repainting every 4–5 years, while aluminium and PVC require less but have higher initial prices.

Wood-aluminium combines external weather resistance with internal warmth. The aluminium exterior protects the wood and cuts maintenance costs.

Anche il vetro incide: un doppio o triplo vetro cambia il costo finale. Ai serramenti si sommano posa e smontaggio.

Double glazing with argon gas is standard. Triple glazing adds about 30–50 euros per square metre depending on coating and cavity thickness.

Low-emissivity coatings improve insulation. The extra cost is often recovered in colder climates through lower heating bills.

Check the solar heat gain coefficient. In southern Italy, low-gain glass prevents overheating; in the north, higher gain helps winter warmth.

Chi sostituisce tutte le finestre di una casa indipendente spende di più. Una villetta può superare i 20.000 euro con finiture di pregio.

A detached home with 25 square metres of windows can cost from 8,000 euros in PVC to over 22,000 euros in wood-aluminium.

Add balconies and French doors. Each large element may require reinforced frames and heavier glass, raising the per-square-metre price.

Roof windows cost more than vertical ones. Installation requires special flashing kits, and the price per unit can exceed 1,500 euros.

Il prezzo medio per finestra oscilla tra 400 e 1.200 euro. Questa cifra include vetro, telaio e ferramenta di base.

Window size affects the price. A 120 by 140 centimetre window typically costs from 450 euros in PVC to 900 euros in aluminium.

Custom sizes cost more than standard. Unusual shapes, curved tops or very small windows often carry a surcharge for non-standard production.

Hardware brands affect cost. Reputable makers charge more for hinges, but their parts typically survive 20,000 open-close cycles without loosening.

Per porte finestre o scorrevoli i costi salgono. Elementi grandi richiedono telai rinforzati e vetri più pesanti.

Sliding patio doors cost more than fixed windows. A two-leaf door with triple glass can easily exceed 2,500 euros excluding installation.

Check the sliding system quality. Smooth rollers and adjustable locks add convenience but increase the final bill.

Lift-and-slide doors are smoother for heavy sashes. Tilting systems cost less but may need more force to move a large glass panel.

I costi indicati non includono sempre IVA e piccoli lavori edili. La riparazione del controtelaio o del cassonetto può aggiungere centinaia di euro.

Wall repair around the frame may be needed. Budget 20–50 euros per linear metre for plaster and painting after removing old windows.

IVAs vary by intervention. Replacements in existing homes may benefit from reduced VAT if tied to renovations, but rules change.

Disposal of old windows costs 30–60 euros per element. Verify that the installer includes this in the quote and manages the waste properly.

Un preventivo dettagliato aiuta a evitare sorprese. Chiedi sempre il costo per singola voce e le specifiche del vetro.

Ask for separate prices for each element. The quote should list material, dimensions, glass type, hardware and installation cost per window.

Compare U-values, not just price. A cheaper window with poor thermal data may cost more in energy over ten years.

Ask whether the price includes VAT. Some quotes show only the net amount, leading to a 10–22 percent surprise at payment.

Request a visit after installation. A final check confirms that all sashes close tightly and that silicone seals have no visible gaps.

I prezzi variano anche in base alla regione. Al Nord spesso il costo della manodopera è più alto che al Sud.

Labour rates change by region. In Milan, installer rates often reach 80 euros per hour, while in Naples they may be around 50.

Travel costs also matter. A company from another province may add a fixed call-out charge that changes the total.

Local suppliers may offer faster after-sales service. National chains often have lower prices but longer response times for spare parts.

Scegliere un serramento di qualità media offre un buon equilibrio. Le soluzioni economiche riducono la spesa iniziale ma possono durare meno.

Beware of prices below 150 euros per square metre. They often use thin frames, basic glass and low-quality hardware with short life.

Ask about warranty length. Trusted producers offer at least 5 years on glass and 10 years on frame parts.

Request third-party certification for thermal performance. Without certified U values, you may lose the right to tax deductions.

La sostituzione completa di un trilocale richiede circa 6-8 finestre. Per un quadrilocale si arriva a 10-12 elementi.

A three-room apartment with seven windows usually fits into one working day for removal and one day for installation and sealing.

Add a half day for cleaning and checks. A tidy installation reduces dust on furniture and protects floors during the work.

After installation, check that energy labels remain on frames. These labels are useful for future sales and for verifying Ecobonus documentation.

Get a written timeline in the contract. Production of custom windows can take four to eight weeks after the order is confirmed.

Pay a deposit, not the full amount. A standard deposit is 30 percent, with the balance due after installation and final inspection.

Confronta almeno tre preventivi per capire se il prezzo è in linea con la media. Per un confronto con una ristrutturazione più ampia, leggi

Idraulici

Elettricisti

Imprese di Copertura Tetti

Imprese di Ristrutturazione Casa

Imprese di Ristrutturazione Bagno

Servizi di Pavimentazione

Falegnami

Imbianchini

Servizi di Fognatura

Servizi di Scavo