{"id":52813,"date":"2026-06-17T09:02:23","date_gmt":"2026-06-17T13:02:23","guid":{"rendered":"https:\/\/darkslategray-baboon-690712.hostingersite.com\/?p=52813"},"modified":"2026-06-17T14:03:11","modified_gmt":"2026-06-17T18:03:11","slug":"utiliser-du-savon-noir-sur-un-parquet-bonne-ou-mauvaise-idee-sur-la-rive-sud","status":"publish","type":"post","link":"https:\/\/lartisanespacedesign.com\/en\/utiliser-du-savon-noir-sur-un-parquet-bonne-ou-mauvaise-idee-sur-la-rive-sud\/","title":{"rendered":"Using black soap on hardwood floors: a good or bad idea on the South Shore?"},"content":{"rendered":"\n

Black soap is making a major comeback in South Shore homes. It is used to clean concrete surfaces, tiles, bathrooms… and increasingly, wood floors. On Instagram and Pinterest, decor influencers praise its merits for maintaining oiled or waxed hardwood<\/a>. But is it truly suitable for all types of wood flooring? <\/p>\n\n\n\n

The short answer: black soap can be excellent for certain floors and completely contraindicated for others. The difference comes down to a single factor: your floor’s finish<\/a> type. In this article, the L’Artisan Espace Design team explains everything\u2014when black soap is appropriate, how to use it correctly, and above all, when to avoid it entirely. <\/p>\n\n\n\n

What is black soap?<\/b><\/strong><\/h2>\n\n\n\n

Black soap (or liquid Marseille soap) is a vegetable-based soap made from linseed or hemp oil, traditionally used in North African countries and Northern Europe for surface maintenance. It comes in the form of a paste or a dark brown liquid with a slightly oily scent. <\/p>\n\n\n\n

Its alkaline composition gives it cleaning and slightly degreasing properties. When diluted correctly, it is biodegradable, non-toxic, and gentle on most surfaces. It is for these reasons that it has become popular again in Quebec households looking to reduce their use of chemicals. <\/p>\n\n\n\n

Note: Black soap sold in hardware stores or natural grocery stores can have varying compositions. Some contain additives (fragrances, dyes) that can stain certain surfaces. Always prioritize pure black soap with simple ingredients. <\/p>\n\n\n\n

Is black soap good for a wood floor?<\/b><\/strong><\/h2>\n\n\n\n

Here is the truth that influencers don’t tell you: black soap is NOT universally compatible with wood floors. It all depends on the type of finish applied to your floor. <\/p>\n\n\n\n

For oiled floors: YES, with precautions<\/b><\/strong><\/h3>\n\n\n\n

This is where black soap excels. Floors finished with natural oil (Rubio Monocoat, Osmo, Bona, Treatex) have a porous surface where the oil has penetrated the wood rather than forming a plasticizing layer on the surface. These floors react very well to diluted black soap, which cleans gently without stripping the oil and leaves the wood clean and slightly nourished. <\/p>\n\n\n\n

For an oiled floor, this is even the maintenance method recommended by several natural oil manufacturers. The slightly alkaline black soap helps maintain the surface balance and prevents dirt from accumulating in the wood pores. <\/p>\n\n\n\n

For waxed or soaped floors: YES, recommended<\/b><\/strong><\/h3>\n\n\n\n

Floors finished with wax or white soap (Scandinavian method) are traditionally maintained with… soap! Diluted black soap is perfect for bringing these floors back to life and reinforcing their natural finish. This is, in fact, the most common maintenance method for soaped pine floors in old South Shore homes. <\/p>\n\n\n\n

For varnished or lacquered floors: NO, absolutely not<\/b><\/strong><\/h3>\n\n\n\n

This is where the problem lies. Floors finished with a polyurethane varnish, lacquer, or epoxy varnish have a plasticizing layer on the surface that protects the wood. Black soap, being slightly alkaline, can attack this varnish layer over time. The result: a varnish that whitens, dulls, or loses its adhesion, and a floor that requires premature sanding. <\/p>\n\n\n\n

On the South Shore, the vast majority of hardwood floors installed since the 1990s are finished with polyurethane varnish. If you do not know for certain what type of finish your floor has, perform the test: place a drop of water on the floor. If it beads (like on a waxed car), it is varnish. If it is absorbed within a few seconds, it is likely oil or wax. <\/p>\n\n\n\n

For floating engineered wood: DEPENDS on the finish<\/b><\/strong><\/h3>\n\n\n\n

Modern engineered floors are most often pre-finished with a polyurethane varnish\u2014making them incompatible with regular black soap. However, some manufacturers offer engineered ranges finished with natural oil that are well-suited for black soap maintenance. Always check the manufacturer’s recommendations before using a new maintenance product. <\/p>\n\n\n\n

How to use black soap on an oiled floor: instructions<\/b><\/strong><\/h2>\n\n\n\n

If your floor is compatible with black soap, here is the method our team recommends for optimal maintenance:<\/p>\n\n\n\n

Step 1: Dilute the soap properly<\/b><\/strong><\/h3>\n\n\n\n

This is the most important step. Never use pure or concentrated black soap on a floor\u2014you risk leaving greasy streaks and making the surface slippery. The recommended dilution: 2 to 3 tablespoons of black soap for 5 liters (1.3 US gal) of lukewarm water. The water should be slightly soapy, not foamy. <\/p>\n\n\n\n

Step 2: Sweep or vacuum first<\/b><\/strong><\/h3>\n\n\n\n

Before washing, use an electrostatic dust mop or a vacuum to remove dust and debris. Washing without removing the dust is equivalent to creating a light mud that becomes embedded in the wood pores. <\/p>\n\n\n\n

Step 3: Apply with a well-wrung mop<\/b><\/strong><\/h3>\n\n\n\n

Use a well-wrung microfiber mop\u2014almost dry. The number one enemy of wood flooring is excess water. Wash following the direction of the wood grain (along the length of the boards) and rinse your mop regularly in clean water. <\/p>\n\n\n\n

On the South Shore, poorly insulated houses can experience significant humidity variations between summer and winter. Excess water on a wood floor can accelerate dimensional changes and create gaps between the boards. The golden rule: less water is better. <\/p>\n\n\n\n

Step 4: Do not rinse<\/b><\/strong><\/h3>\n\n\n\n

Unlike tile, you do not rinse an oiled wood floor after washing with black soap. The light residual film of vegetable soap is beneficial\u2014it slightly nourishes the wood and improves its appearance. If you see streaks or light spots after drying, it means the dilution was too strong or the mop was too wet. <\/p>\n\n\n\n

Step 5: Allow to dry naturally<\/b><\/strong><\/h3>\n\n\n\n

Avoid walking on the floor while it is drying (15-30 minutes depending on the ambient temperature). To speed up drying, you can open windows or slightly increase the room’s ventilation. Avoid sudden drafts that could cause the wood to warp if the room is not well acclimated. <\/p>\n\n\n\n

How often should you maintain with black soap?<\/b><\/strong><\/h2>\n\n\n\n

For an oiled floor with high traffic (living room, hallway, kitchen), washing with black soap can be done once a week. For bedrooms or less frequented spaces, once a month is more than enough. Between washings, a simple dry sweep or vacuuming is sufficient. <\/p>\n\n\n\n

On the South Shore, we often see more dirt and fine sand in winter due to road salt. During the winter season, you might therefore clean slightly more frequently near entrances and high-traffic areas. <\/p>\n\n\n\n

Alternatives to black soap for maintaining varnished floors<\/b><\/strong><\/h2>\n\n\n\n

If your floor is varnished and you are looking for a natural and effective cleaner, here are the alternatives to black soap:<\/p>\n\n\n\n