What to Consider When Ordering Made-to-Measure Ventilation Grilles

Ordering a made-to-measure grille isn't any more complex than ordering a standard one — and it solves almost every problem that arises when a generic grille doesn't quite fit the project. This guide summarizes what information to prepare before requesting a quote, what technical decisions to make, and what to expect in terms of lead times and delivery when working with Industrias Mas.

Three technical advantages over standard grilles. First, an exact fit to the project's actual opening: made-to-measure grilles leave no visible gaps and don't force cuts or perimeter sealing that spoil the finish. Second, a free passage area calculated to CTE DB-HS 3's minimum flow rate: the grille meets regulations by design, with no need to combine several grilles or oversize the opening. Third, aesthetic coherence with the facade: powder-coated aluminum is delivered in five standard RAL colors and, on request, in any other color from the chart, letting the grille match existing window frames, cladding, or SATE insulation.

Before contacting the manufacturer, it's worth having five data points ready: 1) Width of the finished opening, in millimeters. 2) Height of the finished opening, in millimeters. 3) Desired RAL color (one of the five standard ones or a chart code). 4) Number of units needed. 5) Desired lead time. With this information, Industrias Mas prepares a fixed quote within 24 business hours. If the project has openings of different sizes, it's enough to list each opening with its corresponding measurement.

Measuring correctly is the most important step in the whole process. Four practical recommendations: measure the finished opening (after applying cladding, SATE, powder coating, or any layer that reduces the effective opening), not the raw opening before finishes. Use millimeters, not centimeters: differences of a few millimeters count. Take several measurements in width and height, and use the most restrictive one if there are variations. Check there are no hidden installations (ducts, wiring) behind the opening that would limit the frame's recess depth.

Industrias Mas manufactures all its grilles in powder-coated aluminum with 25 microns of polyester lacquer applied to both sides of the profile. Coating both sides is what sets professional aluminum apart from standard powder-coated sheet metal: the visible face is protected against UV, rain, and salinity; the inner face, hidden against the wall, is protected against condensation and possible dampness from the substrate. The result is a grille that keeps its finish for decades with no paint or periodic maintenance.

Grilles are delivered with a concealed fixing system: the wall-anchor screws are hidden by the frame, which eliminates visible heads from the outside and removes the rust points typical of conventional screwed grilles. For the installer, this translates into faster assembly (no need to worry about the appearance of visible heads), and for the end client, a facade with a clean, professional finish.

Some applications require extra accessories beyond the standard grille. The most common are: bird mesh built into the frame to prevent birds or large rodents entering, especially in warehouses, farms, and logistics centers; finer-mesh insect screening for healthcare or food environments; and reinforced frame sizing for large-format grilles subject to wind loads. It's worth mentioning this need when requesting a quote so it's included from the manufacturing stage.

The custom quote is prepared within 24 business hours of the request. Standard orders in stock colors ship within 24-48 business hours; made-to-measure orders with specific dimensions are manufactured in 5 to 10 business days. Delivery is made directly on-site across Spain, simplifying logistics for the site manager and eliminating intermediate handling. For large projects with many grilles, it's worth coordinating the site schedule with the manufacturer to stagger production across phases.

If you have the opening's width and height in millimeters, the desired RAL color, and the number of units, you already have everything needed to request a quote. Contact Industrias Mas by email or phone and you'll receive a fixed quote within 24 business hours. Over 10,000 projects completed in Spain since 1968 and ISO 9001:2015 certification back every order.