Unite insulation fixings
Insulation fixings for self-supporting sheet metal roofs
Insulation fixings for faster roof build-up decisions
Our insulation fixings range is designed for fastening insulation to self-supporting sheet metal roofs. On this page we bring together our Unite isoscrews, washers for iso screws and telescope socket solutions for projects where insulation and sealing membrane need to be fixed to a steel sheet substrate.
For professional buyers, the key questions are usually substrate thickness and drill capacity, the required clamp length or socket range, and whether the roof build-up is better served by a traditional iso screw and washer or a telescope socket with preassembled screw. This page gives you a quicker overview before you go deeper into the full catalogue data.
What is included in our insulation fixings range
Unite isoscrews
Our Unite isoscrews are the core choice for fastening roof insulation to self-supporting sheet metal roofs. Choose them when you want a straightforward insulation fixing where the right screw length and drill capacity are the main decision points.
See details and tables for our Unite isoscrews on page 38 in the catalogue
Washers for iso screws
Our washers for iso screws help you complete the fixing setup with the right washer size and corrosion level for the job. The range includes 40 mm and 80 mm steel washers plus a 40 mm stainless steel option.
See details and tables for our iso screw washers on page 39 in the catalogue
Telescope sockets
Choose our telescopic sockets when you need a better solution for thicker build-ups or for fastening insulation and sealing membrane to a steel sheet surface. The system is supplied with a preassembled screw and covers a wide range of insulation thicknesses.
See details and tables for our telescopic sockets on page 41 in the catalogue
Installation accessories for telescope sockets
We also offer installation accessories for telescopic sockets to support the system in practice. On the same catalogue page you can find the bit extension and T25 bit with M6 thread used with the telescopic socket setup.
See details and tables for our telescopic socket accessories on page 41 in the catalogue
Detailed insulation fixing data in our catalogue
The catalogue below lets you compare isoscrew lengths, washer formats, corrosion options and telescope socket combinations in one place. That makes it easier to match the fixing method to the roof build-up before you send an enquiry or place an order.
If you are working with thicker insulation layers or a build-up that includes sealing membrane, go straight to the telescope socket section. If you are planning a more traditional insulation fixing setup, compare the iso screws and washers first.
Need help choosing insulation fixings?
Choosing the right insulation fixing setup starts with the roof build-up, steel thickness and required clamp range. We help contractors, roofing specialists and buyers compare the practical differences between iso screws, washers and telescope sockets so the fixing solution matches the job.
If you want a second opinion before ordering, our team can help you narrow down the most suitable length, washer format and socket combination for your project.
How do I choose between an iso screw and a telescope socket?
Choose an iso screw and washer when your roof build-up is best handled with a traditional screw-based insulation fixing to a self-supporting sheet metal roof. Choose a telescope socket when you need a system intended for fastening insulation and sealing membrane to a steel sheet substrate and want to match the socket and screw combination more closely to the insulation thickness.
Why does clamp length matter when choosing insulation fixings?
Clamp length matters because the fixing has to suit the full build-up, not just the top layer. For our Unite isoscrews, the catalogue states that the maximum clamp length is the screw length minus 15 mm. For telescope sockets, the practical choice is the socket and screw combination that matches the required thickness range.
What should I check about the steel sheet substrate before choosing an insulation fixing?
You should first confirm the substrate thickness and drill capacity. Our insulation fixings are listed with specific drilling ranges for steel sheet substrates, and a self-drilling point must be matched to the material it is intended to penetrate. That check usually narrows the suitable options very quickly.
When is a stainless washer the better choice?
A stainless washer is the better choice when the project specification calls for a more corrosion-resistant washer setup than the standard steel version. In our range, the washer options include both standard steel washers and a stainless 40 mm alternative, which gives you more flexibility when the environment or specification is more demanding.
When are telescope sockets especially useful in an insulation fixing setup?
They are especially useful when the build-up includes insulation and sealing membrane on a steel sheet substrate and you need a solution that can be matched across a broad range of thicknesses. Our telescope socket range covers build-ups from 40-50 mm up to 350-370 mm, which makes it relevant across both moderate and thicker roof constructions.
Can Unite help us choose the right insulation fixing setup for a specific roof build-up?
Yes. We regularly help customers compare fixing method, length, washer format, socket range and drill capacity before an order is placed. That is often the fastest way to avoid a fixing that looks close on paper but does not match the real roof build-up on site.