Waterproofing membrane or liquid waterproofing: which solution should you choose for your bathroom?

A successful bathroom is not just about beautiful tiles or high-end faucets. Behind every finish lies an essential, often invisible element: the waterproofing system .

Without adequate protection, water can gradually seep into the walls or floor, leading to mold, damage and costly repairs.

Two main solutions are currently used by professionals:

• the waterproofing membrane ;

• the liquid waterproofing system .

So, which one to choose?

Why is waterproofing essential?

Contrary to popular belief, tiles are not waterproof .

Even when the joints are perfectly sealed, a small amount of moisture can penetrate their surface. Without protection beneath the coating, this water eventually reaches the substrate.

This is precisely the role of waterproofing: to create a continuous barrier that provides lasting protection for the structure of your bathroom.

This protection is particularly important in:

• walk-in showers;

• shower walls;

• bathtub contours;

• floors exposed to water splashes.

Waterproofing membrane or liquid waterproofing: two effective solutions for providing long-lasting protection against water infiltration in a bathroom. The choice depends on the substrate, the layout of the space, and the quality of the installation.

The waterproofing membrane: immediate protection

Membranes are synthetic sheets laid directly onto the substrate before tiling.

They offer several advantages:

• excellent water resistance;

• uniform thickness;

• low risk of application error;

• great durability.

Membranes are particularly popular in high-end renovations and walk-in showers.

They also allow for better absorption of certain movements of the support, thus limiting the risk of cracking.

Liquid waterproofing: a flexible and versatile solution

The other method involves applying a liquid product with a roller or brush.

After drying, it forms a continuous membrane directly on the substrate.

This technique has several advantages:

• it easily conforms to complex shapes;

• It is ideal around niches, shower benches and corners;

• it requires few cuts;

• It is suitable for both walls and floors.

However, its effectiveness depends directly on the quality of the application. The applied thickness and adherence to drying times are essential.

Which solution is the most reliable?

In reality, there is no universal answer.

The best choice depends on:

• of the type of project;

• of the existing support;

• technical constraints;

• materials used;

• of the bathroom layout.

In some cases, a membrane will be preferred.

In other cases, a liquid system will offer a more suitable solution.

Some renovations even combine several techniques to ensure optimal protection.

The installer's experience makes all the difference

Regardless of the product chosen, improper installation quickly compromises the seal.

The most sensitive points are:

• the angles;

• wall-floor connections;

• plumbing passages;

• evacuations;

• wall niches.

Successful sealing relies first and foremost on adherence to the manufacturer's recommendations and rigorous execution.

The most common mistakes

During a renovation, certain mistakes are frequently repeated:

• to believe that the seals make the shower waterproof;

• lay the tiles directly onto an unprotected panel;

• neglecting angles and junctions;

• interrupt the continuity of the membrane;

• using materials that are incompatible with each other.

These defects often remain invisible for several months before leaks appear.

How BonBain guarantees lasting waterproofing

At BonBain Construction , every renovation is carried out according to industry best practices.

Before laying the tiles, we select the waterproofing solution best suited to the project in order to ensure long-lasting protection against moisture.

Our team pays particular attention to technical details, including:

• the preparation of the supports;

• the connections between the different surfaces;

• areas susceptible to water infiltration;

• respecting drying times;

• monitoring each step before the installation of the coatings.

Because a well-designed bathroom should remain as beautiful as it is watertight for many years.

Entrust your project to BonBain Construction

Are you planning to renovate your bathroom in Montreal, Laval, Longueuil, Brossard or on the South Shore?

Our team will assist you in choosing the materials, sealing systems and solutions best suited to your project.

Request your free estimate today and benefit from the expertise of a company specializing in custom bathroom renovations.

Contact us