Metal under-tile system

Uninsulated system for roof tiles

Leveraging its expertise in metal, Fibrotubi has revolutionized the market with an under-roof solution that overcomes all the limitations of existing materials.
The metal under-tile system drastically reduces issues related to weight, the fragility of clay tiles, and improper tile installation. It can also be installed at lower slopes than traditional standards while maintaining full waterproofing performance.
The Sottocoppo metal system is designed to be waterproof, walkable, and highly resistant (able to support heavy loads despite its light weight), while ensuring long-lasting and effective tile anchoring.
Each Sottocoppo sheet is supplied with four battens already pre-punched for fastening traditional roof tiles. The batten is designed to be shorter than the sheet and must be installed on the upper rib, allowing multiple sheets to overlap in the case of long roof slopes.

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Technical Data

	Profile height: 32 mm
	Total width: 859 mm
	Effective width: 777 mm
	Standard sheet lengths: 1520 / 2130 / 2440 / 2750 / 3060 / 3990 mm
	Standard batten profile lengths: 1344 / 1932 / 2268 / 2520 / 2856 / 3780 mm
	Minimum slope of use: 15%
	Weight of pre-painted steel sheet (0.6 mm): approx. 6.2 kg/m²
	Steel profile weight: approx. 0.31 kg/m
	Material: pre-painted steel
	Available finish: tile red
	Recommended use: roofing

Advantages

Secure anchoring

Ventilated system with secure tile anchoring thanks to the battens. Possibility to install photovoltaic brackets within the sheet ribs.

Lightweight solution

Lighter than traditional clay under-tile systems, with a weight of only approx. 6.2 kg/m².

Waterproof

Waterproof even at low slopes (minimum installation slope: 15%).

Durable

Walkable and resistant with no risk of breakage. High-resistance coating finish.

Walkable

Walkable and resistant with no risk of breakage.

Ventilated

Ventilated system with secure tile anchoring thanks to the battens.

Installation

				Static scheme Pre-painted steel thickness [mm] Support spacing [m]
			0.5 — 1.5
				3 supports — 0.68 / 2.12 / 9.11 / 53
				4 supports — 0.69 / 6.83 / 5.21 / 83

Deflection limit equal to L/200

Load including a layer of roof tiles covering the profile of 30 kg/m²

Reference standard: EN 1993-1-3; EN 1993-1-2; EN 1993-1-4

The content of this calculation table is to be considered approximate and for indicative purposes only. It is the responsibility of the designer and/or user to carry out the relevant structural calculations for each specific application and to define the applicable design specifications of the roofing system.

Thanks to the possibility of installing full-length sheets, installation time is significantly reduced and complete waterproofing of the roofing system is ensured.