How to Install Cladding Over Old Walls?

Installing cladding over old walls is an effective way to enhance the appearance and durability of a building. Whether you want to clad over existing cladding or install a fresh layer on an aged surface, this process offers numerous benefits. It improves insulation, adds a protective layer against weather conditions, and boosts the property’s aesthetic appeal. In this article, we’ll dive into the steps, considerations, and advantages of installing cladding over old walls.

Can You Install Cladding Over Old Walls?

You can install cladding over old walls, but the success of the installation depends on the condition of the existing wall. Structural stability, surface preparation, and material compatibility are key factors to consider before proceeding.

Preparing Old Walls for Cladding Installation

Before installing cladding over old walls, proper preparation is essential to ensure longevity and durability.

1. Inspecting the Existing Wall

A thorough inspection of the old wall is crucial before installing new cladding. Look for any cracks, damp spots, or structural weaknesses that could affect the stability of the cladding. If there are signs of damage, repairs should be carried out before proceeding. Walls that are not structurally sound may require reinforcement or even complete removal before cladding installation.

2. Cleaning the Surface

Dirt, mold, and loose paint can prevent proper adhesion of cladding materials. The wall surface should be cleaned thoroughly using a power washer or a stiff brush to remove dust and grime. Any mold or mildew should be treated with an appropriate solution to prevent further growth. A clean surface ensures that the cladding adheres properly and lasts longer.

3. Applying a Waterproof Barrier

Moisture can be a major issue when installing cladding over old walls. Applying a waterproof membrane or house wrap is essential to prevent water infiltration. This barrier helps protect the underlying wall from moisture damage and improves the durability of the cladding. Ensure the barrier is properly sealed around windows, doors, and other openings to avoid water seepage.

Do you Know What is The Difference Between Traditional Wood and WPC?

Steps to Install Cladding Over Old Walls

Installing cladding on old walls follows a structured process to ensure stability and longevity.

Measuring and Planning

The total surface area of the wall is measured to determine the amount of cladding required. The appropriate cladding material is selected based on the building’s requirements, and the alignment and layout are planned to ensure a uniform finish.

Installing a Support Framework

A supporting structure, such as battens or a subframe, is put in place to create an even surface for cladding attachment. This framework is securely fastened to the existing wall, ensuring stability and allowing for ventilation gaps to prevent moisture buildup.

Fixing the Cladding Panels

Cladding panels are attached starting from the bottom and working upwards. The method of attachment, (whether using screws, nails, or adhesives) depends on the material used. Even spacing is maintained between panels to accommodate natural expansion and contraction.

Sealing and Finishing

Joints and edges are sealed to prevent water penetration, and a protective coating or paint is applied if necessary. A final inspection ensures all panels are securely in place, with no gaps or loose sections.

Benefits of Installing Cladding Over Old Walls

At first, it may seem that installing new cladding over an old or brick wall is not particularly beneficial. However, this approach offers several advantages that add significant value and practicality for building owners in many aspects.

1. Enhances Building Appearance

A fresh layer of cladding can dramatically transform a building’s exterior, giving it a modern and well-maintained look. Whether opting for metal panels, wood, or contemporary composite materials, new cladding enhances the architectural style and boosts curb appeal. This upgrade and use modern cladding not only makes the property more visually attractive but also increases its market value.

2. Improves Energy Efficiency and sound insulation

Cladding acts as an additional protective layer for a building, significantly enhancing its insulation properties. By reducing heat transfer through walls, it helps maintain indoor temperatures more effectively, leading to lower energy consumption for heating and cooling. This translates into reduced utility bills and a more energy-efficient home.

Additionally, cladding materials (especially insulated panels) can dampen external noise, creating a quieter and more comfortable living or working environment. This is particularly beneficial in urban areas or buildings located near busy roads, where sound pollution can be a major concern.

3. Adds Durability and Protection

• Shields against weather elements like rain, wind, and UV exposure.
• Prevents structural deterioration.

4. Cost-Effective Solution

• Less expensive than rebuilding or extensive renovations.
• Reduces labor and material costs.

If you live in Canada and are considering renovating or upgrading the old walls of your building, it’s important to have a clear understanding of renovation costs in Canada in order to plan effectively and make informed choices. For advice and more information, feel free to contact us.

Can Put Cladding Over Rendering or Pebbledash?

Yes, but it depends on the condition of the surface. If the rendering or pebbledash is stable and free from cracks, cladding can be applied over it using battens for proper alignment. Otherwise, removing loose material is recommended.

Can You Clad Over Existing Cladding?

Technically, installing new cladding over existing cladding is possible, but it is generally recommended to remove the old material first and replace the new one. The feasibility depends on the condition of the existing cladding, its material, and how it was originally installed. In some cases, adding new cladding over old layers can lead to weight issues or improper alignment, which could compromise the structure’s integrity. 

 However, whether you can clad over existing cladding depends on several factors:

• Structural Condition: The existing cladding must be in good shape, without significant damage or decay.
• Material Type: Some materials, such as PVC or fiber cement, may support an additional layer, while others, like deteriorating wood, may not.
• Installation Method: The way the original cladding was installed plays a role in whether new cladding can be added on top.

For the best results, it is advisable to consult professionals who can assess the situation and recommend the most suitable approach.

Disadvantages of Cladding Over Existing Cladding

While adding new cladding over old layers might seem convenient, there are several drawbacks to consider:

Increased Structural Load

Additional layers of cladding add weight to the structure, which may exceed the load-bearing capacity of the original wall.

Potential Trapped Moisture

If moisture is trapped between layers, it can cause mold, decay, and structural weakening over time.

Uneven Surface Issues

Old cladding might not provide a smooth enough base for new panels, leading to misalignment and aesthetic inconsistencies.

Compromised Durability

The lifespan of new cladding may be reduced if it is installed over a deteriorating base, as existing structural issues can affect its stability and performance.

Regulatory and Compliance Concerns

Building codes may restrict the number of cladding layers allowed on a structure. It’s essential to check local regulations before proceeding with an installation.

Summary

Installing cladding over old walls is a practical and effective solution to upgrade a building’s aesthetics and performance. However, careful preparation, material selection, and proper installation are essential for success. Whether you’re covering existing cladding or applying it over pebbledash, ensuring structural integrity and moisture control is key to achieving long-lasting results.

Frequently asked questions