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NEWA ventilation flashing designed for installation under the ridge is a key element for the proper functioning of the roof. Dedicated to flat roof tiles from our offer: VERONA, PŁASKA, PŁASKA PLUS, and REGLE. The product is available in a standard length of 2.0 m.
Flashings play an extremely important role in ensuring long-lasting and trouble-free roof performance. They are responsible for proper ventilation of the roof deck—that is, the free flow of air beneath the roofing material— allowing the roofing material to naturally expel moisture that accumulates on its inner surface and, as a result of condensation, turns into water and dampness. In the long term, this moisture causes irreversible damage to both the roof framing and the roofing material itself.
The under-ridge strip (or, colloquially, the under-hip strip) for flat metal roof tiles is a special flashing designed for the assembly of flat metal roof tiles, including the VERONA, PŁASKA, PŁASKA PLUS, and REGLE models. Due to their low profile, the under-ridge strip designed for them has also been lowered, which significantly improves the appearance of the roof surface. Thanks to this design, the ridge flashings fit much more snugly against the roof coverings and do not stick out, resulting in a marked improvement in the roof’s aesthetics.
The new strip also features a newly designed perforation pattern that ensures optimal airflow (see technical specifications) while also facilitating condensate drainage. Finally, its design ensures optimal rigidity and stability during the assembly of the ridge flashings, despite its reduced profile (special double “fold”). For other two-module metal roof tiles, an under-ridge strip is not used; instead, a ridge strip serves this purpose. We offer the under-ridge strip for flat metal roof tiles in only one length—2.0 m.
We offer three types of under-ridge strips. They all serve the same purpose but are designed for different types of roofing materials. Their purpose is to: 1. They ensure proper ventilation thanks to ventilation openings with an appropriate surface area—the effective surface area of the exhaust ventilation slot should be one-fourth that of the intake slot, measured per side of the roof slope – in accordance with DIN 4108:03, min. 50 cm² per running meter. This solution ensures an adequate pressure differential that forces increased air movement beneath the roof coverings. 2. They ensure a tight seal—acting as a barrier against loose snow and light rain that might blow in under the Ridge flashings (the so-called ridge tile). 3. They serve as a support element for assembling the Ridge flashings—the strip should be attached to the roof coverings using staple-type screws on both sides of the roof slope in a straight line. Use the same screws (staple-type), in a color matching the roof coverings, to install the ridge flashings. It is also recommended to use ridge tape with mesh to ensure the highest level of waterproofing, especially in the case of sloped ridges (so-called “grad” ridges).
Blachy Pruszyński Company offers three types of under-ridge strips: Standard, TP26 SUPER, and flat metal roof tiles. The first is used for PD510 standing seam panels, KARO panels, and single-module flat metal roof tiles. The second is designed for TP26 SUPER trapezoidal sheets—its design allows for assembly without the need to cut the strip at the trapezoidal ridges, and its width matches that of the sheet. The third option is an under-ridge strip for flat metal roof tiles—VERONA, FLAT, FLAT PLUS, and REGLE
NOTE: Detailed installation instructions can be found in the dedicated installation manuals in the “Downloads” section. >> Assembly Instructions (available in the CONTRACTOR and DISTRIBUTOR profiles)
| Type of coverage | Available strip length |
|---|---|
| Single-module metal roof tiles: FLAT, FLAT PLUS, REGLE | 2.0 m |
| Type of coverage | Available strip length |
|---|---|
| PD-510 Standing Seam Panels | 0.5 m | 2.0 m |
| KARO Panels | 2.0 m |
| Type of coverage | Available strip length |
|---|---|
| TP26 SUPER Trapezoidal Sheet Metal | 1.109 m |
| Type of coverage | Available strip length |
|---|---|
| VERONA, FLAT, FLAT PLUS, and REGLE Flat Metal Roof Tiles | 2.0 m |
The strip is used during assembly of these products
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