DOUBLE ROOFING Smart Overroofing System

A new layer over your existing roof, maintaining the strength of both layers while avoiding the typical expenses and disruptions of a full replacement.

Double Roofing OnduClassic - Rust
Double Roofing OnduClassic - Rust Treatment
Double Roofing OnduClassic with Battens
Double Roofing OnduClassic with sheets
Double Roofing OnduClassic - Complete System
Double Roofing OnduClassic - Rust Double Roofing OnduClassic - Rust Treatment Double Roofing OnduClassic with Battens Double Roofing OnduClassic with sheets Double Roofing OnduClassic - Complete System
Double Roofing Onduvilla - Rust
Double Roofing Onduvilla - Rust Treatment
Double Roofing Onduvilla with Battens
Double Roofing Onduvilla with sheets
Double Roofing Onduvilla - Complete System
Double Roofing Onduvilla - Rust Double Roofing Onduvilla - Rust Treatment Double Roofing Onduvilla with Battens Double Roofing Onduvilla with sheets Double Roofing Onduvilla - Complete System

DOUBLE ROOFING Smart Overroofing System

A smart and efficient solution that installs a new Onduline roof over your existing one—preserving structural integrity while avoiding the high costs, mess, and downtime of a full roof replacement.

With Onduline Classic and Onduvilla Roofing Systems, you can layer a lightweight roofing solution over your current roof, supporting reliable protection and helping maintain the structure beneath. These systems are designed for easy handling and installation over old roofing materials, making them suitable for a wide range of renovation.

For contractors and homeowners, double roofing offers a straightforward installation process with minimal disruption to daily activities. If you’re exploring options for renovating or improving your roof, check out how the Onduline double-roofing approach can support your next project.

Colors
Request for Site Visit
Request for Sample Product

DESCRIPTION

System Benefits

Time & Cost Efficiency
Seamless Roof Repair
Operate Without Interruption
Lightweight
Renovation
Easy to Install
Complete System

Time & Cost Efficiency

A double roofing system offers a practical way to manage project expenses and shorten installation time. Because the existing roof remains in place, there is no need for removal, hauling, or extended labor. This makes it a suitable option for Filipino homeowners and business owners looking for a straightforward approach to roof repair, quicker installation work, or minimal-intervention roofing—especially during the rainy season when timelines matter.

Seamless Roof Repair

Double roofing allows the existing roof to be strengthened without the usual disruption of traditional repairs. It adds a secondary layer over old GI roofing, aging materials, or weathered surfaces, helping maintain indoor comfort and addressing common issues seen in many Philippine homes, such as tag-ulan leaks, heat buildup, or noise from outdoor activity.

Operate Without Interruption

This method enables households, shops, warehouses, and commercial spaces to stay functional throughout the installation. With no demolition or major debris, daily routines can continue while the new layer is installed. This makes double roofing a practical choice for property owners who prefer a roofing upgrade that supports ongoing activities with minimal interruption.

Installation Process: Step-by-Step Guide for Onduline Double Roofing

Follow these key steps to install the Onduline Double Roofing System over an existing roof:

  • Step 1: Assess Rust and Penetration Levels
    Check the current roof for rust, holes, or weak spots to understand the condition of the surface before installation.
  • Step 2: Measure Roof Slope and Inspect Purlin Spacing
    Confirm that the roof pitch and purlin spacing meet the required specifications for Onduline Classic or Onduvilla systems.
  • Step 3: Lay Onduline Sheets/Tiles and Fix Battens
    Position the sheets properly and secure battens to prepare a stable layer for installation.
  • Step 4: Use Onduline Screws
    Fasten the sheets using Onduline screws to help ensure proper attachment and alignment.
  • Step 5: Install the Ridge
    Complete the installation by fixing the ridge caps to cover joints and finish the roof system.

Check this article  for the complete guide

ProfileONDULINE CLASSIC 
Length2000 mm  [-0.4 ; +20mm]
Width950 mm  [± 20mm]
Thickness3 mm  [-10 % ; +10 %]
# of Corrugations10
Height of Corrugation38 mm [± 2 mm]
Gross weight per sheet6.5kg* [± 0.35kg]
Gross area per sheet    1.90 m²
Roof Pitch5º-10º, 11º -14º & ≥ 15º
Effective area per sheet1.35 m2 (5º -14º) 1.53 m2 (>15º)
Purlins spacing

600 mm + Full deck (5º-10º)

450 mm (11º-14º)

600 mm (≥ 15º)

 

ProfileONDUVILLA
Length400 mm [-1; +4]
Width1070 mm  [-20; +20]
Thickness3 mm [-10 % ; +10 %]
Height of corrugation38 mm  [± 2 mm]
Gross area/sheet0.43 m2
Gross weight/sheet1.3 kg [± 0.9kg]
Effective area/sheet0.31 m2
Installed weight per m24.19 kg/m²

APPLICATION

Hizon's Residence Hizon's Residence
Hizon's Residence Hizon's Residence
Puero's Residence Puero's Residence
Puero's Residence Puero's Residence
Reprocrafter Warehousing Reprocrafter Warehousing
Reprocrafter Warehousing Reprocrafter Warehousing
St. Andrew Cathedral Parish St. Andrew Cathedral Parish
St. Andrew Cathedral Parish St. Andrew Cathedral Parish
Buildmasters' Residential Project Buildmasters' Residential Project
Buildmasters' Residential Project Buildmasters' Residential Project

INSTALLATION & DOCUMENTATION

Roof Renovation Made Simple with Double Roofing.  For guidance on the correct fixing methods, or for any technical questions during installation, you can reach out to the ONDULINE TEAM for expert support.

Contact us

HOW TO DO DOUBLE ROOFING?

Learn how to do overrofing, onduline style with DOUBLE ROOFING.

Browse FAQ