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On-site testing – roof screws and membrane fastening in OSB board

3 min
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At one of the construction sites, the contractor faced a task that required exceptional precision – fastening the roofing membrane directly to the OSB board layer. The Rawlplug team carried out a series of tests to identify the optimal solution.

An OSB board approximately 25 mm thick was used in the project as a load-bearing layer beneath the roof covering. The key challenge was to select a fastener that would ensure a durable and stable fixing of the membrane – without damaging the material and while meeting installation requirements. We analysed several types of roof screws from the Rawlplug range to observe their performance in real installation conditions and determine which of them worked best with this type of substrate.

This is one of those clients who regularly turn to us with unusual challenges – something we always take as a compliment. This time, the task was to fasten a roofing membrane to an OSB board, which is still a relatively uncommon solution. Projects like this require an individual approach and carefully selected solutions.

Dominik Klimek

Project Engineer

See the photos from the pull-out tests

Products used in the membrane-to-OSB board fastening test

During the on-site testing, we assessed the performance of three different types of roof screws, each selected specifically for the unusual substrate – OSB board. Each product has distinct features and applications, briefly described below.

R-WO roof screws – quick installation and reliable grip

Rawlplug R-WO roof screws are designed for fixing into trapezoidal sheet metal up to 0.9 mm thick, but they also perform well in wooden and wood-based substrates, such as OSB boards. The sharp point of the R-WO screw prevents slippage on the surface, while the hardened thread and corrosion-resistant coating – tested for 15 Kesternich cycles – ensure durability even in demanding conditions. The option for pre-assembling fixing sets further facilitates roof installation work.

R-WBT roof screws – universal fixing for concrete and wood

Rawlplug R-WBT roof screws are versatile fixings suitable for both concrete and timber substrates. Their dual-thread design, corrosion-resistant coating and sharp point allow for fast and trouble-free installation. The precisely formed head is compatible with telescopic sleeves, enabling pre-assembly – a key advantage in flat roof insulation systems. This makes them a reliable choice for complex roof structures with mixed substrates.

UC roof screws – precise fixing in timber and wood-based materials

Koelner UC screws are designed with precision and aesthetics in mind. Their geometry allows installation in all types of timber, while the specially shaped head with locking ribs minimises the risk of splitting – even close to the edge. The head sits flush with the surface, making this screw ideal for finishing works and light-duty fixings in timber or OSB boards.

Want to speed up installation? Try a complete solution!

R-WO and R-WX roof screws are components of the pre-assembled R-GOK plastic roof sleeve sets. Ready-to-use and secured against screw loss, these sets significantly improve comfort and speed on site by eliminating the need to assemble the sleeve and screw during installation. Discover the full range of R-GOK roof sleeves with screw.

Testy na budowie

How does the on-site test work? Watch the video!

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