Key points
- Ask whether the company makes and installs the system or resells one fitted by a third party.
- Get the glass type and thickness and the hardware quality in writing.
- A warranty is only as good as whoever honours it: ask who comes out if something fails.
- Compare quotes with the same breakdown; the cheapest often leaves items out.
- Be wary of a fixed price without a site survey.
Manufacturer, installer or reseller
Three models coexist in Spain: companies that manufacture and install with their own team, installers who fit systems bought from a manufacturer, and sales outfits that sell and subcontract the fitting. All three can do good work, but the difference shows when the system has to be adapted to an awkward opening or when something goes wrong: the more links in the chain, the slower the fix.
Ask plainly who manufactures, who measures and who fits. If the answer is three different companies, ask who stands behind the warranty.
Glass and hardware: what the photos do not show
Glass curtains must use tempered safety glass, the kind that meets EN 12150: if it breaks, it breaks into small blunt fragments. The usual thickness is 8 or 10 mm; on exposed penthouses or high floors facing the Levante wind, 10 mm or laminated glass is the safer choice. Ask for the thickness to be written on the quote.
The hardware is the other half: rollers, tracks, pivots and seals. On the coast, salt attacks low-grade metal parts, and that is what makes curtains stop sliding after a few years. Ask what the tracks and rollers are made of and whether spare parts are available. Our spare parts and maintenance guide explains what wears out.
Warranty and aftercare
Get the warranty in writing, with its length and what it covers: guaranteeing the glass is not the same as guaranteeing the whole system and the installation. Then ask how it works in practice: who comes, how quickly and from where. A company with a workshop near your home can deal with an adjustment within days; one working from another province may not.
If you live abroad part of the year, also ask how they handle a service visit when you are not there, and in which language you will deal with them.
How to compare quotes
A serious quote comes from a site survey with real measurements, not a phone call. To compare offers, ask every company for the same breakdown:
- Glass type and thickness, and number of panels.
- System and hardware quality (tracks, rollers, locks).
- What installation includes: finishing, removal of anything existing, special access.
- Whether IVA (Spanish VAT) is included, and lead times.
- Warranty: length, scope and who provides it.
As a 2026 market guide, frameless glass curtains cost €140–€260 per m² installed with IVA on the Costa del Sol. An offer far below that range is usually explained by thinner glass, cheaper hardware or missing items. Our glass curtain cost guide has totals by terrace size.
Reviews, permits and red flags
Read the company's Google reviews, especially those from a year or two ago: they say more about the enclosure than the ones written the week it was fitted. Ask to see real installations in your area. And notice whether the company raises community and town-hall permission before you do. Our guide to community permission in Andalusia explains the usual steps.
- A fixed price over the phone without seeing the terrace.
- Pressure to sign at the first visit.
- Glass or hardware not specified on the quote.
- A verbal-only warranty, or one provided by a different company from the one you pay.
How CostaGlass works
We are a direct manufacturer and installer: we measure, build in our own Estepona workshop and fit with our own team, and have done so on the Costa del Sol since 2010, with more than 500 projects. Our quotes itemise glass, hardware, installation and IVA, every installation carries a 10-year warranty, and the team works in English and Spanish. If you are comparing, ask us for the same breakdown as everyone else: request a site survey.
Frequently asked questions
What makes a good glass curtain company?
One that makes or controls the system it fits, specifies glass and hardware in writing, gives a clear warranty that it honours itself, and has aftercare close to your home. Compare at least two itemised quotes.
What glass should glass curtains use?
Tempered safety glass (EN 12150), usually 8 or 10 mm. On exposed penthouses or high floors, 10 mm or laminated glass.
How much do glass curtains cost in Spain?
In 2026, €140–€260 per m² installed with IVA on the Costa del Sol, or €220–€400 per m² with laminated or solar-control glass.
Can I deal with the company in English?
Ask before the survey. CostaGlass handles the survey, quote, community paperwork and aftercare in English or Spanish.
About CostaGlass
CostaGlass designs, manufactures and installs glass curtains, pergolas and terrace enclosures directly - based in Estepona (Málaga) with over 10 years of experience across the Costa del Sol. Our bilingual team (English and Spanish) handles the survey, manufacturing and installation with no middlemen.
+34 856 171 651·info@costaglass.com