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Roller Shutter Locks and Profile Adapters: 40, 60, 70 mm and Rehau Single vs Double Hole
The role of roller shutter locks, how to match the 40, 60 and 70 mm versions to your shutter system, what profile adapters do and the difference between single- and double-hole adapters for Rehau profiles. With FAQ.

Roller Shutter Locks and Profile Adapters: 40, 60, 70 mm and Rehau Single vs Double Hole

A roller shutter lock is an accessory fitted to the lower part of a roller shutter to make it harder to push a closed shutter up from outside. Windoform shutter locks come in 40, 60 and 70 mm versions, and the right one depends on the shutter system. Profile adapters are parts that help hardware seat correctly on a specific profile system.

What Does a Roller Shutter Lock Do?

External roller shutters are used on homes for shading, privacy and an additional layer of protection. When the shutter is closed, its lower end sits between the side guide rails. This is where the shutter lock comes in: in the locked position it helps prevent the curtain from being moved upwards in the rails, so the shutter stays closed unless it is opened from inside.

Shutter locks are typically used for:

  • ground-floor and garden-level windows
  • holiday homes and second homes that are empty for long periods
  • easily accessible balcony and terrace doors
  • shop and small business front shutters

How to Choose Between 40, 60 and 70 mm

Windoform shutter locks are produced in three versions: 40, 60 and 70 mm. Which version to use depends on the shutter system in the application. If the wrong size is chosen, the lock may not seat correctly and cannot do its job. When selecting:

  1. Identify the shutter system and slat design in use.
  2. Check the match between system and lock size against the technical data in the catalogue.
  3. If in doubt, contact the sales team with a sample or system details.

Fabricators and shutter manufacturers should remember that one project may include shutters of different sizes. Listing the correct lock size for each window before ordering reduces the risk of errors.

What Is a Profile Adapter?

In PVC joinery, each profile manufacturer's system has its own cross-section and hole pattern. A profile adapter is an intermediate part that allows hardware and accessories to sit correctly on these different profile geometries. With the right adapter, parts seat properly and installation runs more smoothly. The wrong adapter can cause gaps, friction or fitting difficulties.

Single-Hole vs Double-Hole Adapters for Rehau Profiles

The Windoform profile adapter range includes single-hole and double-hole versions for use with Rehau profiles. The difference lies in the number and arrangement of the fixing holes. Which type to use depends on the connection pattern of the profile and hardware. As a general rule:

  • identify the profile series and connection points in the application,
  • select the single- or double-hole adapter that matches this pattern,
  • confirm model-specific compatibility using the drawings and dimensions in the catalogue.

About Windoform

With industrial roots dating back to 1963 and the WINDOFORM® brand in use since 1993, Windoform manufactures more than 3000 products at its factory in Torbalı, İzmir, with about 17,000 m² of covered area, and exports to 80 countries. Shutter locks and profile adapters are developed with in-house R&D on the same production base as our window handles, door handles and hinges. Read more in our company profile.

Frequently Asked Questions

Can a shutter lock be retrofitted to an existing shutter?

In many cases yes, provided the shutter system and lock size are compatible. Compare your system details with the catalogue or ask our sales team before fitting.

What is the difference between the 40, 60 and 70 mm locks?

The three versions are intended for different shutter systems. Check the technical data in the catalogue to see which one fits your system.

Should I choose a single-hole or double-hole adapter?

That depends on the connection pattern of your Rehau profile series and hardware. Choose the adapter that matches the hole pattern of the profile.

What happens if the wrong profile adapter is used?

Parts may not seat properly, which can make installation difficult or affect how the hardware works. Checking compatibility before ordering reduces this risk.

Find all shutter locks and profile adapters in the Windoform catalogues. Registered dealers can order via b2b.windoform.com. To identify the right part for your system, call +90 232 854 70 00 or email info@windoform.com.tr.

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