{"id":278244,"date":"2022-10-28T13:05:08","date_gmt":"2022-10-28T13:05:08","guid":{"rendered":"https:\/\/www.sanier.pl\/bw-hasla\/jak-zrobic-fasete\/"},"modified":"2025-02-18T12:16:17","modified_gmt":"2025-02-18T12:16:17","slug":"jak-zrobic-fasete","status":"publish","type":"knowledgebase","link":"https:\/\/www.sanier.pl\/en\/bw-hasla\/jak-zrobic-fasete\/","title":{"rendered":"How to Create a Fillet Joint?"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text]<\/p>\n

How to Create a Fillet Joint?<\/h1>\n

A fillet joint (chamfer)<\/strong> is an essential element that must be applied where the foundation wall meets the footing, as well as at wall-to-wall connections<\/strong> inside the foundation. The sharp external edges of the footing and foundation wall should be chamfered or rounded<\/strong>. This process ensures a controlled thickness of the waterproofing layer<\/strong> and helps prevent cracks<\/strong> at material transitions. Additionally, a fillet joint aids in directing rainwater away<\/strong> from the structure.<\/p>\n

Why Is a Fillet Joint Necessary?<\/h3>\n

One of the main functions of a fillet joint is to seal the connection<\/strong> between the foundation slab and the footing<\/strong>. Without a fillet, it is impossible to apply waterproofing in an inside corner<\/strong> while maintaining a uniform thickness<\/strong> of the layer.<\/p>\n

Applying too much waterproofing material<\/strong> in these areas often leads to tearing due to shrinkage. The thinner layers dry faster and shrink earlier<\/strong>, while the corners shrink much later<\/strong>, causing stress and cracks<\/strong> in the waterproofing layer.<\/p>\n

How to Create a Fillet Joint?<\/h3>\n

Creating a fillet joint is not a difficult task. You will need a mineral mortar based on pure cement<\/strong> and a trowel<\/strong>. SANIER recommends using the waterproofing mortar Bostik Sperrm\u00f6rtel<\/strong> for this purpose.<\/p>\n

Builders often use a PVC pipe, a glass bottle, or a jar<\/strong> to shape the fillet joint.<\/p>\n

Step-by-step process:<\/strong><\/h4>\n
    \n
  1. Prepare the surface<\/strong> \u2013 Ensure the substrate is stable, free of holes, grease stains, paint, plaster, and cement slurry<\/strong>. Clean and roughen the surface, then remove any dust.<\/li>\n
  2. Dampen the surface<\/strong> \u2013 Before applying the mortar, the area should be moist but not wet<\/strong>.<\/li>\n
  3. Apply the mortar<\/strong> \u2013 Take a small amount<\/strong> of mortar with a trowel and throw it into the corner<\/strong>. Spread and shape it while removing excess material. You can collect the excess and reuse it<\/strong> elsewhere.<\/li>\n
  4. Profile the fillet joint<\/strong> \u2013 Use a rounded trowel, a PVC pipe, a jar, or a bottle<\/strong> to shape the fillet joint smoothly.<\/li>\n
  5. Allow it to dry<\/strong> \u2013 The setting time is approximately 5 hours<\/strong>, but full load capacity is reached after 24 hours<\/strong>.<\/li>\n<\/ol>\n

    Important Notes<\/h3>\n
      \n
    • External wall corners must be chamfered (beveled) to avoid a sharp 90-degree angle.<\/strong><\/li>\n
    • If chamfering is not done, a reinforcement mesh or sealing tape<\/strong> should be embedded in the waterproofing layer to strengthen the joint.<\/li>\n
    • SANIER recommends using Bostik Dickbeschichtung 2K+ bituminous waterproofing<\/strong> for optimal protection.<\/li>\n<\/ul>\n

      By following these steps, you ensure a durable and crack-resistant waterproofing layer<\/strong>, improving the overall longevity and efficiency of your foundation.<\/p>\n

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