{"id":8714,"date":"2026-06-11T03:17:46","date_gmt":"2026-06-11T03:17:46","guid":{"rendered":"https:\/\/excavationchanthier.ca\/en\/?p=8714"},"modified":"2026-06-11T04:18:26","modified_gmt":"2026-06-11T04:18:26","slug":"best-french-drain-contractors","status":"publish","type":"post","link":"https:\/\/excavationchanthier.ca\/en\/best-french-drain-contractors\/","title":{"rendered":"Best French Drain Contractors in Montreal"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"8714\" class=\"elementor elementor-8714\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7f802807 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7f802807\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-46e1eca\" data-id=\"46e1eca\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-743c4e5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"743c4e5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-eefb170\" data-id=\"eefb170\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-52e9425d elementor-widget elementor-widget-text-editor\" data-id=\"52e9425d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<style>\n.best-french-drain-contractors-article-content {\n  max-width: 100%;\n  padding: 30px;\n  background: #ffffff;\n  border-radius: 10px;\n  box-shadow: 0 4px 6px rgba(0,0,0,0.1);\n  color: #333;\n  font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, sans-serif;\n  line-height: 1.6;\n}\n\n\/* Typography *\/\n.best-french-drain-contractors-article-content h1 {\n  font-size: 2.5rem;\n  color: #2c3e50;\n  text-align: center;\n  margin-bottom: 30px;\n  padding-bottom: 15px;\n  border-bottom: 3px solid #9e0505;\n}\n\n.best-french-drain-contractors-article-content h2 {\n  font-size: 1.8rem;\n  color: #34495e;\n  margin-top: 40px;\n  margin-bottom: 20px;\n  padding-left: 15px;\n  border-left: 5px solid 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0.7;\n}\n\n\/* Website links \u2014 override: blue, no border, no hover effect *\/\n.best-french-drain-contractors-article-content a.best-french-drain-contractors-entrepreneur-website {\n  color: #3498db;\n  border-bottom: none;\n  font-weight: 600;\n  opacity: 1;\n}\n\n.best-french-drain-contractors-article-content a.best-french-drain-contractors-entrepreneur-website:hover {\n  opacity: 1;\n}\n\n\/* Responsive Design *\/\n@media (max-width: 768px) {\n  .best-french-drain-contractors-article-content {\n    padding: 15px;\n  }\n\n  .best-french-drain-contractors-article-content h1 {\n    font-size: 1.6rem;\n  }\n\n  .best-french-drain-contractors-article-content h2 {\n    font-size: 1.3rem;\n    margin-top: 30px;\n  }\n\n  .best-french-drain-contractors-article-content h3 {\n    font-size: 1.1rem;\n  }\n\n  .best-french-drain-contractors-entrepreneur-meta {\n    flex-direction: column;\n    gap: 8px;\n  }\n\n  .best-french-drain-contractors-cta-button a {\n    padding: 10px 20px;\n    font-size: 14px;\n    max-width: 90%;\n    display: inline-block;\n  }\n\n  .best-french-drain-contractors-article-content table th,\n  .best-french-drain-contractors-article-content table td {\n    font-size: 12px;\n    padding: 8px;\n  }\n}\n\n@media (max-width: 480px) {\n  .best-french-drain-contractors-article-content h1 {\n    font-size: 1.4rem;\n  }\n\n  .best-french-drain-contractors-article-content h2 {\n    font-size: 1.2rem;\n  }\n\n  .best-french-drain-contractors-article-content h3 {\n    font-size: 1rem;\n  }\n\n  .best-french-drain-contractors-cta-button a {\n    padding: 10px 15px;\n    font-size: 13px;\n    max-width: 95%;\n    display: block;\n    margin: 0 auto;\n  }\n\n  .best-french-drain-contractors-entrepreneur-card {\n    padding: 15px;\n  }\n\n  .best-french-drain-contractors-entrepreneur-card.featured {\n    padding: 20px;\n  }\n}\n\n@media (max-width: 320px) {\n  .best-french-drain-contractors-article-content {\n    padding: 10px;\n  }\n\n  .best-french-drain-contractors-article-content h1 {\n    font-size: 1.3rem;\n  }\n\n  .best-french-drain-contractors-article-content h2 {\n    font-size: 1.1rem;\n    padding-left: 10px;\n  }\n\n  .best-french-drain-contractors-article-content ul,\n  .best-french-drain-contractors-article-content ol {\n    padding-left: 20px;\n  }\n\n  .best-french-drain-contractors-cta-button a {\n    padding: 8px 12px;\n    font-size: 12px;\n    max-width: 100%;\n    display: block;\n    word-wrap: break-word;\n  }\n\n  .best-french-drain-contractors-highlight-box,\n  .best-french-drain-contractors-info-box,\n  .best-french-drain-contractors-warning-box {\n    padding: 15px;\n  }\n\n  .best-french-drain-contractors-questions-section {\n    padding: 15px;\n  }\n\n  .best-french-drain-contractors-key-points {\n    padding: 15px;\n  }\n}\n\n<\/style>\n<div class=\"best-french-drain-contractors-article-content\">\n  <h1>Best French Drain Contractors in Montr\u00e9al (2026)<\/h1>\n\n  <div class=\"best-french-drain-contractors-meta\">\n    Published March 19, 2026 | Updated: June 11, 2026 | By Excavation Chanthier\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-highlight-box\">\n    <h3>In brief<\/h3>\n    <ul>\n      <li>Installing or replacing a French drain costs between <strong>$15,000 and $40,000<\/strong> in Greater Montr\u00e9al<\/li>\n      <li>We compared <strong>10 French drain contractors<\/strong> active in the Montr\u00e9al area<\/li>\n      <li>Criteria: <strong>verified Google reviews<\/strong>, RBQ licence, specialization, service area<\/li>\n      <li>Best season for the work: <strong>April to November<\/strong><\/li>\n    <\/ul>\n  <\/div>\n\n  <hr class=\"best-french-drain-contractors-divider\" \/>\n\n  <p>Whether for the <a href=\"https:\/\/excavationchanthier.ca\/en\/excavation\/french-drain\/\"><strong>installation or replacement of a French drain<\/strong><\/a> that is aging, or an <strong>urgent repair<\/strong> after water infiltration, choosing the right French drain contractor in Montr\u00e9al makes all the difference. With dozens of companies active in this niche across Qu\u00e9bec, we analyzed the most active French drain contractors in the metropolitan area based on their <strong>verified Google reviews<\/strong>, their specialization and their market presence.<\/p>\n\n  <hr class=\"best-french-drain-contractors-divider\" \/>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card featured\">\n    <span class=\"best-french-drain-contractors-entrepreneur-badge\">#1 \u2014 Our Recommendation<\/span>\n    <h2>Excavation Chanthier \u2014 Terrebonne (Lanaudi\u00e8re \/ Greater Montr\u00e9al)<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>4.9\/5<\/strong> (76 Google reviews)<\/span>\n      <span>&#x1F4C5; In business since <strong>2010<\/strong><\/span>\n      <span>&#x1F4DC; RBQ Licence: <a href=\"https:\/\/www.pes.rbq.gouv.qc.ca\/RegistreLicences\/FicheDetenteur\/5644464901?mode=Entreprise\" target=\"_blank\" rel=\"noopener\"><strong>5644-4649-01<\/strong><\/a><\/span>\n      <span>&#x1F6E1; Insurance: <strong>$2M<\/strong><\/span>\n    <\/div>\n    <p>Excavation Chanthier is a contractor specialized in <strong>exterior and interior French drains<\/strong>, serving Greater Montr\u00e9al, Laval, the North Shore and Lanaudi\u00e8re. The company stands out with a <strong>turnkey<\/strong> approach that includes foundation waterproofing, Delta-MS membrane installation, connection to the municipal sewer, and full restoration of the property.<\/p>\n    <p>Their team of 5 to 10 employees handles the entire process \u2014 from camera inspection to the final warranty \u2014 <strong>with no subcontracting<\/strong>. They also offer complementary excavation, demolition and sewer-repair services, which lets you bundle several jobs into a single project.<\/p>\n    <h3>What sets them apart:<\/h3>\n    <ul>\n      <li><a href=\"https:\/\/excavationchanthier.ca\/en\/excavation\/french-drain\/french-drain-cost\/\"><strong>Online price calculator<\/strong><\/a> \u2014 one of the only ones in the industry, gives an instant estimate<\/li>\n      <li><strong>No subcontracting<\/strong> \u2014 all work done by their own team<\/li>\n      <li><strong>Complementary services<\/strong> \u2014 excavation, demolition, sewers (one contractor for the whole project)<\/li>\n      <li><strong>Bilingual<\/strong> \u2014 service in French and English<\/li>\n      <li><a href=\"https:\/\/excavationchanthier.ca\/en\/excavation-contractor-montreal\/\"><strong>Extended service area<\/strong><\/a> \u2014 Montr\u00e9al, Laval, North Shore, Lanaudi\u00e8re, Laurentians and more than 50 municipalities<\/li>\n    <\/ul>\n    <div class=\"best-french-drain-contractors-cta-button\"><a href=\"https:\/\/excavationchanthier.ca\/en\/contact\/\">GET A FREE QUOTE<\/a><\/div>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/excavationchanthier.ca\/en\/\">&#x1F310; excavationchanthier.ca\/en<\/a>\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card\">\n    <h2>2. Fondaco \u2014 French Drains and Crack Repair<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>4.9\/5<\/strong> (61 Google reviews)<\/span>\n      <span>&#x1F6E0; Excavation contractor<\/span>\n    <\/div>\n    <p>Fondaco specializes in installing <strong>French drains and repairing foundation cracks<\/strong>. With a 4.9\/5 rating, it is one of the most active French drain contractors in the Montr\u00e9al area&#8217;s advertising campaigns.<\/p>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/fondaco.ca\/\" target=\"_blank\" rel=\"noopener\">&#x1F310; fondaco.ca<\/a>\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card\">\n    <h2>3. Groupe Durasec \u2014 Terrebonne<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>4.3\/5<\/strong> (64 Google reviews)<\/span>\n      <span>&#x1F4CD; Terrebonne, QC<\/span>\n      <span>&#x1F6E0; Foundation and drainage<\/span>\n    <\/div>\n    <p>Groupe Durasec offers <strong>French drain, waterproofing and camera-inspection<\/strong> services. Based in Terrebonne, the company is present in both main advertising markets for French drains in Montr\u00e9al.<\/p>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/groupedurasec.com\/\" target=\"_blank\" rel=\"noopener\">&#x1F310; groupedurasec.com<\/a>\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card\">\n    <h2>4. Solex Expert (drain-francais.ca) \u2014 Sainte-Catherine<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>4.8\/5<\/strong> (51 Google reviews)<\/span>\n      <span>&#x1F4CD; Sainte-Catherine, QC<\/span>\n      <span>&#x1F6E0; Concrete contractor<\/span>\n    <\/div>\n    <p>Solex Expert, owner of the <strong>drain-francais.ca<\/strong> domain, offers French drain installation and replacement services on the South Shore. Founded in 2007, this French drain contractor also covers excavation and concrete work.<\/p>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/drain-francais.ca\/\" target=\"_blank\" rel=\"noopener\">&#x1F310; drain-francais.ca<\/a>\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card\">\n    <h2>5. Syst\u00e8mes Sous-sol Qu\u00e9bec \u2014 Laval<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>4.8\/5<\/strong> (1,051 Google reviews)<\/span>\n      <span>&#x1F4CD; Laval, QC<\/span>\n      <span>&#x1F6E0; Waterproofing<\/span>\n    <\/div>\n    <p>Syst\u00e8mes Sous-sol Qu\u00e9bec is the biggest player on this list in terms of <strong>Google review volume (1,051)<\/strong>. Specialized in basement waterproofing, the company also offers French drain installation as a complement to its drainage solutions.<\/p>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/www.systemessoussolsquebec.ca\/\" target=\"_blank\" rel=\"noopener\">&#x1F310; systemessoussolsquebec.ca<\/a>\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card\">\n    <h2>6. Sous-Sol S\u00e9cure \u2014 Montr\u00e9al<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>4.9\/5<\/strong> (57 Google reviews)<\/span>\n      <span>&#x1F4CD; Montr\u00e9al, QC<\/span>\n      <span>&#x1F6E0; General contractor<\/span>\n    <\/div>\n    <p>Sous-Sol S\u00e9cure offers <strong>waterproofing and French drain<\/strong> services in the Montr\u00e9al area. With a 4.9\/5 rating across 57 reviews, the company is an active competitor in the French drain advertising market.<\/p>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/soussolsecure.ca\/\" target=\"_blank\" rel=\"noopener\">&#x1F310; soussolsecure.ca<\/a>\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card\">\n    <h2>7. MJO Excavation \u2014 Mont-Saint-Hilaire<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>4.9\/5<\/strong> (34 Google reviews)<\/span>\n      <span>&#x1F4CD; Mont-Saint-Hilaire, QC<\/span>\n      <span>&#x1F6E0; Drainage service<\/span>\n    <\/div>\n    <p>MJO Excavation is a French drain contractor based on <strong>Montr\u00e9al&#8217;s South Shore<\/strong>. Despite a smaller number of reviews (34), the company has a very aggressive advertising presence with one of the highest top-position rates in the market.<\/p>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/mjoexcavation.ca\/\" target=\"_blank\" rel=\"noopener\">&#x1F310; mjoexcavation.ca<\/a>\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card\">\n    <h2>8. Excavation Rive-Sud \u2014 Richelieu<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>4.8\/5<\/strong> (40 Google reviews)<\/span>\n      <span>&#x1F4CD; Richelieu, QC<\/span>\n      <span>&#x1F6E0; Excavation contractor<\/span>\n    <\/div>\n    <p>Excavation Rive-Sud offers <strong>excavation and French drain<\/strong> services in the Richelieu area and Montr\u00e9al&#8217;s South Shore. The contractor is available 24 hours and covers residential drainage work.<\/p>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/excavationrive-sud.com\/\" target=\"_blank\" rel=\"noopener\">&#x1F310; excavationrive-sud.com<\/a>\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card\">\n    <h2>9. JLK Companies \u2014 Lorraine<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>4.1\/5<\/strong> (26 Google reviews)<\/span>\n      <span>&#x1F4CD; Lorraine, QC<\/span>\n      <span>&#x1F6E0; Excavation contractor<\/span>\n    <\/div>\n    <p>JLK Companies offers <strong>excavation and foundation<\/strong> services including French drain installation in the Laurentians and Montr\u00e9al&#8217;s North Shore.<\/p>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/jlkexcavationfondation.com\/\" target=\"_blank\" rel=\"noopener\">&#x1F310; jlkexcavationfondation.com<\/a>\n  <\/div>\n\n  <div class=\"best-french-drain-contractors-entrepreneur-card\">\n    <h2>10. Drain-Spartiate \u2014 Anjou, Montr\u00e9al<\/h2>\n    <div class=\"best-french-drain-contractors-entrepreneur-meta\">\n      <span>&#x2B50; <strong>5.0\/5<\/strong> (190 Google reviews)<\/span>\n      <span>&#x1F4CD; Anjou, Montr\u00e9al<\/span>\n      <span>&#x1F6E0; Drainage service<\/span>\n    <\/div>\n    <p>Drain-Spartiate is the only French drain contractor on this list with a <strong>perfect 5.0\/5 rating across 190 Google reviews<\/strong>. Specialized in cleaning, camera inspection and drain unclogging, the company is based in Anjou and covers the metropolitan area.<\/p>\n    <a class=\"best-french-drain-contractors-entrepreneur-website\" href=\"https:\/\/drain-spartiate.com\/\" target=\"_blank\" rel=\"noopener\">&#x1F310; drain-spartiate.com<\/a>\n  <\/div>\n\n  <hr class=\"best-french-drain-contractors-divider\" \/>\n\n  <h2>French Drain Contractors \u2014 Comparison Table<\/h2>\n  <div class=\"responsive-table\">\n    <table>\n      <thead>\n        <tr>\n          <th>Contractor<\/th>\n          <th>Google Rating<\/th>\n          <th>Reviews<\/th>\n          <th>Region<\/th>\n          <th>Specialty<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr>\n          <td><strong>Excavation Chanthier<\/strong><\/td>\n          <td><strong>4.9\/5<\/strong><\/td>\n          <td>76<\/td>\n          <td>Terrebonne, Lanaudi\u00e8re<\/td>\n          <td>Turnkey French drain, excavation, demolition<\/td>\n        <\/tr>\n        <tr>\n          <td>Fondaco<\/td>\n          <td>4.9\/5<\/td>\n          <td>61<\/td>\n          <td>Greater Montr\u00e9al<\/td>\n          <td>French drains, foundation cracks<\/td>\n        <\/tr>\n        <tr>\n          <td>Groupe Durasec<\/td>\n          <td>4.3\/5<\/td>\n          <td>64<\/td>\n          <td>Terrebonne<\/td>\n          <td>Drainage, waterproofing, inspection<\/td>\n        <\/tr>\n        <tr>\n          <td>Solex Expert<\/td>\n          <td>4.8\/5<\/td>\n          <td>51<\/td>\n          <td>Sainte-Catherine<\/td>\n          <td>French drains, excavation, concrete<\/td>\n        <\/tr>\n        <tr>\n          <td>Syst\u00e8mes Sous-sol Qu\u00e9bec<\/td>\n          <td>4.8\/5<\/td>\n          <td>1,051<\/td>\n          <td>Laval<\/td>\n          <td>Waterproofing, French drains<\/td>\n        <\/tr>\n        <tr>\n          <td>Sous-Sol S\u00e9cure<\/td>\n          <td>4.9\/5<\/td>\n          <td>57<\/td>\n          <td>Montr\u00e9al<\/td>\n          <td>Waterproofing, French drains<\/td>\n        <\/tr>\n        <tr>\n          <td>MJO Excavation<\/td>\n          <td>4.9\/5<\/td>\n          <td>34<\/td>\n          <td>Mont-Saint-Hilaire<\/td>\n          <td>Drainage, excavation<\/td>\n        <\/tr>\n        <tr>\n          <td>Excavation Rive-Sud<\/td>\n          <td>4.8\/5<\/td>\n          <td>40<\/td>\n          <td>Richelieu<\/td>\n          <td>Excavation, French drains<\/td>\n        <\/tr>\n        <tr>\n          <td>JLK Companies<\/td>\n          <td>4.1\/5<\/td>\n          <td>26<\/td>\n          <td>Lorraine<\/td>\n          <td>Excavation, foundation<\/td>\n        <\/tr>\n        <tr>\n          <td>Drain-Spartiate<\/td>\n          <td>5.0\/5<\/td>\n          <td>190<\/td>\n          <td>Anjou, Montr\u00e9al<\/td>\n          <td>Cleaning, inspection, unclogging<\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <hr class=\"best-french-drain-contractors-divider\" \/>\n\n  <h2>How to Choose Your French Drain Contractor<\/h2>\n  <div class=\"best-french-drain-contractors-key-points\">\n    <h3>Essential checks before signing<\/h3>\n    <ol>\n      <li><strong>Valid RBQ licence<\/strong> \u2014 Check the <a href=\"https:\/\/www.rbq.gouv.qc.ca\/en\/you-are\/citizen\/check-a-contractors-licence\/\" target=\"_blank\" rel=\"noopener\">RBQ register<\/a>. Every French drain contractor must hold an active licence<\/li>\n      <li><strong>Liability insurance<\/strong> \u2014 Minimum $2M in civil liability insurance. Ask for written proof<\/li>\n      <li><strong>Verified Google reviews<\/strong> \u2014 See the comparison table above. Favor a 4.5+ rating with at least 50 reviews<\/li>\n      <li><strong>Detailed quote<\/strong> \u2014 It must include: drain length, material type, membrane, connection, property restoration and warranty<\/li>\n      <li><strong>Municipal permits<\/strong> \u2014 Confirm the contractor handles the permits for you<\/li>\n      <li><strong>Camera inspection<\/strong> \u2014 Favor a French drain contractor who offers an inspection before the work for an accurate diagnosis<\/li>\n    <\/ol>\n    <h3>Red flags to watch for<\/h3>\n    <ul>\n      <li>Abnormally low price \u2014 a well-installed French drain lasts <strong>30+ years<\/strong>, beware of shortcuts<\/li>\n      <li>No RBQ licence shown, or a refusal to provide it<\/li>\n      <li>Request for full payment before the work begins<\/li>\n      <li>No written contract or a vague quote<\/li>\n    <\/ul>\n  <\/div>\n\n  <hr class=\"best-french-drain-contractors-divider\" \/>\n\n  <div class=\"best-french-drain-contractors-questions-section\">\n    <div class=\"best-french-drain-contractors-faq\">\n      <h2>How much does a French drain cost in Montr\u00e9al?<\/h2>\n      <p>A French drain costs between <strong>$15,000 and $40,000<\/strong> in the Montr\u00e9al area. The price depends on the foundation length (measured in linear feet), the soil type, site accessibility and any complementary work required (waterproofing, sewer connection, membrane replacement). Always request at least 3 detailed quotes to compare.<\/p>\n    <\/div>\n    <div class=\"best-french-drain-contractors-faq\">\n      <h2>How is a French drain installed?<\/h2>\n      <p>Installing a French drain involves several steps: <strong>excavation<\/strong> around the foundation down to the footing, cleaning and inspecting the foundation, applying a <strong>waterproofing membrane<\/strong> (such as Delta-MS), installing the <strong>perforated pipe<\/strong> (minimum 100 mm in diameter) on a bed of clean stone, covering with clean stone (minimum 150 mm), laying a geotextile membrane, <strong>connecting to the drainage system<\/strong> (storm sewer or sump pit), then backfilling and restoring the property. The work usually takes between 3 and 7 business days.<\/p>\n    <\/div>\n    <div class=\"best-french-drain-contractors-faq\">\n      <h2>What is a French drain cleanout chimney?<\/h2>\n      <p>A French drain cleanout chimney (also called an access chimney) is a <strong>vertical pipe<\/strong> installed at the corners of the foundation that gives access to the drain for <strong>camera inspection<\/strong> and <strong>pressure cleaning<\/strong> without having to excavate. The BNQ 3661-500 standard recommends installing cleanout chimneys, particularly in areas at risk of iron ochre. The cost of installing a chimney is generally included in the French drain price.<\/p>\n    <\/div>\n    <div class=\"best-french-drain-contractors-faq\">\n      <h2>How much does it cost to clean a French drain?<\/h2>\n      <p>Cleaning a French drain costs between <strong>$300 and $800<\/strong> depending on accessibility (via a cleanout chimney or not) and the degree of clogging. Preventive cleaning every <strong>3 to 5 years<\/strong> is recommended to extend the system&#8217;s lifespan, which averages 25 to 40 years. Cleaning is especially important in areas prone to iron ochre.<\/p>\n    <\/div>\n    <div class=\"best-french-drain-contractors-faq\">\n      <h2>How much does a French drain camera inspection cost?<\/h2>\n      <p>A camera inspection of a French drain costs between <strong>$200 and $500<\/strong> in the Montr\u00e9al area. This diagnosis checks the drain&#8217;s condition without excavation: debris buildup, the presence of iron ochre, sagging or disconnected pipes. Several French drain contractors on this list, including Excavation Chanthier and Groupe Durasec, offer this service.<\/p>\n    <\/div>\n    <div class=\"best-french-drain-contractors-faq\">\n      <h2>What is the difference between an interior and exterior French drain?<\/h2>\n      <p>The <strong>exterior French drain<\/strong> is installed around the outer perimeter of the foundation \u2014 it is the standard and most effective solution for capturing water before it reaches the foundation. The <strong>interior French drain<\/strong> is installed inside the basement, along the perimeter of the concrete slab \u2014 it redirects water that has already penetrated toward a sump pit. The exterior drain generally costs between $15,000 and $40,000 (excavation required), while the interior drain costs between $5,000 and $15,000.<\/p>\n    <\/div>\n  <\/div>\n\n  <hr class=\"best-french-drain-contractors-divider\" \/>\n\n  <div class=\"best-french-drain-contractors-footer-note\">\n    <p><strong>Note:<\/strong> The information presented in this article is based on public Google Maps data and our knowledge of the French drain contractor market in Montr\u00e9al. Ratings and review counts may have changed since publication. Always verify directly with the contractor.<\/p>\n    <p><strong>Publication date:<\/strong> March 19, 2026 | <strong>Updated:<\/strong> June 11, 2026 | <strong>Author:<\/strong> Excavation Chanthier<\/p>\n  <\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Best French Drain Contractors in Montr\u00e9al (2026) Published March 19, 2026 | Updated: June 11, 2026 | By Excavation Chanthier In brief Installing or replacing a French drain costs between $15,000 and $40,000 in Greater Montr\u00e9al We compared 10 French drain contractors active in the Montr\u00e9al area Criteria: verified Google reviews, RBQ licence, specialization, service [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":8713,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_theme","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[63,62,58,59,60],"class_list":["post-8714","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-comapanies","tag-contractors","tag-french-drain","tag-gcr-warranty","tag-residential-construction"],"_links":{"self":[{"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/posts\/8714","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/comments?post=8714"}],"version-history":[{"count":5,"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/posts\/8714\/revisions"}],"predecessor-version":[{"id":8730,"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/posts\/8714\/revisions\/8730"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/media\/8713"}],"wp:attachment":[{"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/media?parent=8714"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/categories?post=8714"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/excavationchanthier.ca\/en\/wp-json\/wp\/v2\/tags?post=8714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}