Ventilation flashing, installed under the ridge. Recommended for standing seam panels and modular roof tiles. Available in polyester coatings and two standard lengths – 0.5 rm and 2.0 rm.
VENTILATION FLASHINGS play an extremely important role in ensuring the long-term and trouble-free use of the roof. They are responsible for the correct ventilation of the roof slope, i.e., the free flow of air under the covering, thanks to which the covering naturally gets rid of moisture that accumulates on the inner side of the covering and, as a result of the condensation phenomenon, turns into water and moisture. In the long term, this moisture causes irreversible damage both to the roof framing and can also cause damage to the covering itself.
The under-ridge strip is a special flashing dedicated to the installation of PD-510 standing seam panels and modular roof tiles. For these coverings, the installation of the ridge cap (also known as “gąsior”) is performed on a so-called intermediate flashing – specifically the under-ridge strip. This strip is also colloquially called the under-cap strip, following the customary name of this element.
We offer the under-ridge strip in two lengths:
We offer three types of under-ridge strips. All of them perform the same function but are tailored to different roof coverings. Their tasks are:
1. Provide properly functioning ventilation thanks to ventilation openings of the appropriate surface area – the outlet ventilation gap should have an effective area four times smaller than the inlet gap, measured per one side of the roof slope – in accordance with the DIN 4108 standard; min. 50 cm²/lm. This solution ensures the appropriate pressure difference that forces increased air movement under the roofing metal sheets.
2. Ensure tightness – acting as a barrier against loose snow and light rain blown under the ridge flashings (the so-called ridge cap).
3. Act as a load-bearing element for ridge flashing assembly – the strip should be mounted to the roof covering using stitch screws on both sides of the roof slope in a straight line. Using the same screws (stitch screws) in a color matched to the color of the roof covering, the ridge flashings must be installed. It is also recommended to use ridge tapes with mesh to ensure the highest level of protection regarding tightness, especially in the case of hip ridges.
The Blachy Pruszyński offer includes 3 types of under-ridge strips – Standard, TP-26 SUPER, and for flat roof tiles. The first one is applied to PD510 standing seam panels, KARO panels, and single-module flat roof tiles. The second one is designed for the TP-26 SUPER trapezoidal sheet – its design allows for installation without the need to cut the strip at the ribs of the trapezoid, and its width corresponds to the width of the sheet. The third option is the under-ridge strip for flat roof tiles – VERONA, PŁASKA, PŁASKA PLUS, and REGLE.
NOTE: detailed installation recommendations can be found in the dedicated installation instructions in the downloads section >> Installation instructions (available in the contractor and distributor profiles).
| System | Lenght |
|---|---|
| Single-module flat roof tiles FLAT, FLAT PLUS, REGLE | 2,0 m |
| System | Lenght |
|---|---|
| PD-510 standing seam panels | 0,5 m | 2,0 m |
| KARO Panels | 2,0 m |
| System | Lenght |
|---|---|
| TP-26 SUPER trapezoidal sheet | 1,109 m |
| System | Lenght |
|---|---|
| Under-ridge stSingle-module flat roof tiles FLAT, FLAT PLUS, REGLErip for flat roof tiles | 2,0 m |
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