Unite frame fixings
Frame fixings for adjustable window and door frame installation
Adjustable frame fixings for timber, steel and concrete
Our frame fixings are designed for adjustable installation of window and door frames in timber, steel and concrete. The system is built around frame sleeves, substrate-specific screws and simple adjustment during installation.
This makes it easier to position the frame accurately in the opening and then choose the right fixing for the supporting substrate. Our range also includes the tools used to install and adjust the sleeve-based system.
What is included in our frame fixing range
Adjustable frame sleeves
Our frame fixing range starts with adjustable frame sleeves for window and door frames. The range includes two sleeve sizes, M80 and M81, for installations where the frame is first positioned and then adjusted in the opening.
Open frame sleeves and adjustable frame fixing details on page 62
Frame fixings for timber joists
For timber joists, our range includes M91 wood screw for adjustable frame fixing together with the sleeve system. We also offer M94, a frame screw with sleeve for adjustable fixing of window and door frames in timber joists.
Frame fixings for steel joists
For steel joists, the range includes M92, a self-drilling screw for adjustable frame fixing. This is the steel option in the same sleeve-based installation logic, making it easier to keep the installation method consistent across different projects.
Frame fixings for concrete and brick
For concrete and brick-based installations, our range includes M93 for adjustable frame fixing. The installation note also covers use in solid brick and cored brick, with pre-drilling in cored brick.
Detailed frame fixing sizes and installation steps in our catalogue
Use the catalogue below to compare our frame sleeves, timber, steel and concrete fixings, and the installation tools used for the system. This page is especially useful when you want one quick overview of the full adjustable frame fixing setup.
You can also use it to review the four-step installation sequence, including frame preparation, sleeve adjustment and substrate-specific fastening for timber, steel, concrete and brick-based openings.
Need help choosing the right frame fixing?
We help professional buyers and installers choose the right frame fixings for window and door frame installation in timber, steel and concrete. If you need support with product choice, installation logic or a specific project setup, our team can help you move faster and choose with more confidence.
What are frame fixings used for?
Our frame fixings are used for adjustable installation of window and door frames. The system combines frame sleeves and substrate-specific screws so the frame can be positioned, adjusted and then fixed in place.
Which substrates can your frame fixings be used in?
Our range covers installation in timber joists, steel joists, concrete and brick-based openings. The catalogue also notes use in solid brick and cored brick.
Which fixing should I use for timber, steel and concrete?
For timber joists, use M91. For steel joists, use M92, which is a self-drilling screw. For concrete and brick-based openings, use M93. The sleeve-based system stays the same, while the fixing changes with the substrate.
How is the frame sleeve installed?
The frame sleeve is installed from the outside of the frame before the window or door is lifted into position. The frame is pre-drilled with 14 mm holes, after which the sleeve is screwed out so the frame is fixed and can be adjusted in the opening.
Do steel frames need any special preparation?
Yes. The installation note states that steel frames require M16 thread in the hole. That requirement should be considered before installation starts.
Can the same concrete screw be used in solid and cored brick?
Yes, M93 is used for both concrete and solid brick as well as cored brick. For cored brick, the catalogue instruction says to pre-drill ø 6 mm.