Technical specification

Technical Information

Coated sheet metal soffits (low-profile trapezoidal sheets) (T7P, TP7P), similar to low-profile facade trapezoidal sheets (T6, T7P, T8), are not recommended for use on large surfaces due to their low profile and the technical properties of the steel. Detailed recommendations can be found in the section APPLICATION AND ASSEMBLY below.

Protective coating—polyester. If you are interested in custom colors, please contact our sales department to confirm whether we can fulfill your order according to your specific requirements.


Profile height:
7 mm

Usable width:
1,176 mm

Overall width:
1,195 mm
Maximum recommended sheet length:
0,50
Application:
Roofs with solid sheathing and roofing felt
Color scheme:
the manufacturer's color palette
Podbitka TP-7P - z perforacją - przekroj

Recommendations

Transport and Storage

  • If you are picking up the goods with your own vehicle, the vehicle should have an open loading platform that allows for easy loading and unloading.
  • On the construction site, the panels should be stored in their original packaging, under a roof. Storage under these conditions should not exceed 3 weeks from the date of manufacture. After this time, the packaging must be opened, and the panels must be separated with spacers to allow for free air circulation. The maximum storage period should not exceed 6 months from the date of manufacture, under penalty of voiding the Warranty.
  • Protective films are used to provide additional protection for coated sheet metal against mechanical damage, stress, and impacts that may occur during transportation, handling, or forming. Protective films never exempt the user from the obligation to properly secure the sheets during storage or to protect them from the harmful effects of chemicals during processing. It is recommended to gradually remove the film from the finished profiles, one piece at a time, shortly before installing the wall and roof components on the building.
  • Improper storage can make it difficult to remove the protective film and leave adhesive residue on the sheets.

Maintenance and Cleaning

  • To extend the service life of roofs and facades made of coated sheet metal, they should be inspected and maintained regularly.
  • Inspection – Once a year (preferably in the spring), you should inspect the roof and exterior walls to detect any damage early on.
  • Cleaning Metal Sheets – Roofs and facades made of coated metal sheets require cleaning at least once a year. Dirt that accumulates on the sheet metal can cause uneven discoloration (due to uneven exposure to UV rays) and reduce corrosion resistance (dirt traps moisture on the sheet metal, gradually damaging it). Dirty and stained areas can be cleaned with a soft brush and water (max. 60°C). If necessary, a mild detergent may be added to the water (pH 6–7, max. 10% solution). Pressurized water (max. 100 bar) may also be used for cleaning; however, the water jet must not be directed too close to the sheet’s surface (min. 30 cm), nor should it be directed perpendicular to the surface. At the joints, the water stream should be directed downward to prevent pressurized water from entering the gaps around the joints. Old coatings must be handled with extreme caution. Wash from top to bottom, and always rinse the cleaned area thoroughly with clean water immediately afterward.
  • Do not use scouring powders, nitro solvents, chlorine-based solutions, aromatic cleaning agents, or products containing ammonium chloride (salmiak) or sodium salts.
  • Damage — Any repairs to damage that may occur during the Warranty period should be discussed with the roof/facade contractor and may be performed only with the contractor’s approval. Repairs to small areas are performed using air-drying touch-up paints. Painting large areas is generally only possible using special industrial paints designed for the renovation of coatings. The area to be painted should be limited only to those spots that require it (scratches down to the metal layer, corrosion spots, etc.). Surface preparation for painting must be performed in accordance with generally accepted principles. Always thoroughly remove all traces of corrosion—preferably using special brushes or fine-grit sandpaper. Then, the surface to be repaired must be thoroughly dusted, degreased, and cleaned. To degrease the surface, you can use extraction gasoline or water with added surfactants (preferably with 1–2% ammonia solution). The repaired areas may show color differences compared to the original sheet metal colors due to natural weathering (aging of the paint under the influence of UV radiation).
  • Organically coated steel sheets must not be used in:
    • an environment in constant contact with highly saline water,
    • contact with construction chemicals, including concrete, plaster, wet wood, etc.,
    • in an environment exposed to harsh chemicals
    • in combination with materials having a different electrochemical potential
  • CAUTION—Health and safety rules must be strictly observed during inspections, cleaning, maintenance, and repairs.
  • The Pruszyński Company is not liable for any accidents that may result from performing the above activities.

Application and Assembly

Low-profile trapezoidal sheets (T6, T7P, TP7P, T8), due to their specific design—low profile and the steel’s technical properties related to thermal expansion—have a natural tendency to develop flat deformations in the areas between the corrugations (ribs). For this reason, we recommend using them for small areas such as:

  • soffits
  • garages
  • garage doors
  • fences, etc.

When used on larger surfaces, with sheet lengths exceeding 4 running meters and a core thickness of 0.5 mm, the Blachy Pruszyński Company acknowledges the possibility of deformation and waviness, for which it assumes no liability. The use of low-profile trapezoidal sheets on large wall and building facade surfaces requires proper preparation of the substructure, in accordance with the design documentation, which must account for the need to install expansion joints.

Color Scheme

The colors shown below may differ from the actual product.

PMG35® / ULTRAMAT®

PMG R033
PMG R033
PMG RAL 7016
PMG RAL 7016

TOPMAT®

TOPMAT RR 033
TOPMAT R033
TOPMAT R750
TOPMAT R750
TOPMAT RAL 7016
TOPMAT RAL 7016
TOPMAT RAL 7042
TOPMAT RAL 7042
TOPMAT RAL 8017
TOPMAT RAL 8017

wood-like

Dąb Złoty
Dąb Złoty
Orzech Jasny
Orzech Jasny
Dąb Szlachetny
Dąb Szlachetny

Product Description

elementy do mocowania blachodachowki

Perforated trapezoidal sheet metal soffit

Roof soffit is a key component of the roof covering system that prevents animals from nesting under the roof covering

In addition to its functional role, soffit also serves an aesthetic purpose, significantly improving the appearance of the underside of the roof. Using sheet metal soffit offers a number of advantages:

  • the ability to match the color scheme perfectly to the color of the roofing material
  • No warping and greater rigidity than plastic
  • resistance to aging and discoloration
  • Easy assembly – can be ordered custom-sized

Blachy Pruszyński Company offers two types of soffit panels: TP-7P trapezoidal sheet metal soffit panels with perforations and TP-7P trapezoidal sheet metal soffit panels without perforations. The perforations ensure proper ventilation and prevent moisture buildup in the attic. The carefully selected size of the machine-punched holes ensures that neither larger animals, such as martens, nor much smaller ones, such as wasps, can get under the roof coverings. Furthermore, the soffit material is incomparably more durable than plastic or wooden soffits, making it impossible for animals to breach this barrier by gnawing through it.

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