{"id":248486,"date":"2026-09-01T08:36:22","date_gmt":"2026-09-01T07:36:22","guid":{"rendered":"https:\/\/www.marbre-import.fr\/?page_id=248486"},"modified":"2026-09-01T08:36:22","modified_gmt":"2026-09-01T07:36:22","slug":"diagnosis-loose-stone-hollow-sounding-floors","status":"publish","type":"page","link":"https:\/\/www.marbre-import.fr\/en\/natural-stone-encyclopedia\/diagnosis-loose-stone-hollow-sounding-floors\/","title":{"rendered":"Diagnosis: Loose Stone or Hollow-Sounding Floors"},"content":{"rendered":"

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Home<\/a> \/ Natural Stone Encyclopedia<\/a> \/ Diagnosis: Loose Stone or Hollow-Sounding Floors<\/strong><\/div>\n
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Diagnosis and installation defects<\/p>\n

Diagnosis: Loose Stone or Hollow-Sounding Floors<\/h1>\n

Investigate hollow sounds, debonding and loose stone by examining installation method, coverage, substrate, moisture, movement and the extent of loss of support.<\/p>\n

Request expert advice<\/a>View available stone<\/a><\/div>\n<\/div>\n<\/section>\n
\"Testing<\/a>
Testing a stone floor for hollow sound and loss of bond<\/figcaption><\/figure>\n
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A hollow sound is an observation<\/h2>\n

Different construction systems can sound different. A hollow response may indicate a void, debonding, a floating build-up or simply local geometry. It is not a diagnosis by itself.<\/p>\n

Map sound consistently and compare with known construction and movement patterns.<\/p>\n<\/section>\n

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Look for movement and risk<\/h2>\n

Check rocking, cracked joints, lifted edges, lippage, broken pieces and changes over time. Loose wall or fa\u00e7ade stone can create immediate falling risk and requires safety action.<\/p>\n

Floors in traffic routes may also become a trip or breakage hazard.<\/p>\n<\/section>\n

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Possible mechanisms<\/h2>\n

Poor adhesive coverage, skinned adhesive, dusty substrate, excessive moisture, weak screed, incompatible products and structural movement can all reduce support.<\/p>\n

Thermal cycles or moisture-sensitive stone can contribute to curling and stress.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Evidence<\/th>\nPossible interpretation<\/th>\n<\/tr>\n<\/thead>\n
Isolated hollow zone with no movement<\/td>\nLocal void requiring monitoring or assessment<\/td>\n<\/tr>\n
Rocking piece<\/td>\nLoss of support or bond<\/td>\n<\/tr>\n
Cracked joints in pattern<\/td>\nSubstrate or thermal movement<\/td>\n<\/tr>\n
Dark moisture plus debonding<\/td>\nLeak or trapped water<\/td>\n<\/tr>\n
Adhesive on stone only<\/td>\nPossible substrate bond failure<\/td>\n<\/tr>\n
Adhesive on substrate only<\/td>\nPossible stone-interface failure<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
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Investigate proportionately<\/h2>\n

Begin with drawings, history, sounding map and moisture observations. Use thermal imaging or other non-destructive tools only with competent interpretation.<\/p>\n

Targeted lifting or cores can reveal layers but should be planned to preserve evidence.<\/p>\n<\/section>\n

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Repair the cause, not only the sound<\/h2>\n

Local lifting and resetting may suit isolated stable defects; widespread failure can require systematic replacement and substrate correction. Injection is not universally appropriate.<\/p>\n

Verify adhesion, support and dry appearance in a trial repair before repetition.<\/p>\n<\/section>\n

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Need advice for a real project?<\/h2>\n

Marble Import supports international homeowners, architects and interior designers with stone selection, samples, technical feasibility and coordination of high-end stonework in France and across Europe.<\/p>\n

Request a quotation<\/a>Contact our team<\/a><\/div>\n<\/section>\n<\/div>\n
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Related natural-stone guides and services<\/h2>\n

Continue with the technical guides and project resources most closely connected with this subject.<\/p>\n

Marble and natural stone specialist in France<\/a>Natural Stone Encyclopedia<\/a>Contact Marbre Import<\/a>Marble and Natural-Stone Glossary<\/a>Natural-Stone Installation: Methods, Joints and Quality Control<\/a>France: NF DTU 52.2 and Adhesive-Fixed Natural Stone<\/a>Substrates, Screeds, Levelling and Residual Moisture Before Stone Installation<\/a>Stone Installer Training Level 2: Independent Site Work<\/a>Diagnosis: Dull, Yellowed or Grey Marble<\/a>Diagnosis: Stains on Marble and Natural Stone<\/a>Read the natural-stone blog<\/a>Natural stone for private clients<\/a>Resources for architects and professionals<\/a>Request a project quotation<\/a>Browse available marble and natural stone<\/a>Independent natural-stone consulting<\/a><\/div>\n<\/section>\n

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Investigate hollow-sounding or loose stone through installation method, adhesive coverage, substrate, moisture, movement and targeted opening-up.<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":248269,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_et_pb_use_builder":"off","_et_pb_old_content":"","_et_gb_content_width":"","_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-248486","page","type-page","status-publish","hentry"],"acf":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"et-pb-post-main-image":false,"et-pb-post-main-image-fullwidth":false,"et-pb-portfolio-image":false,"et-pb-portfolio-module-image":false,"et-pb-portfolio-image-single":false,"et-pb-gallery-module-image-portrait":false,"et-pb-post-main-image-fullwidth-large":false,"et-pb-image--responsive--desktop":false,"et-pb-image--responsive--tablet":false,"et-pb-image--responsive--phone":false},"uagb_author_info":{"display_name":"Nicolas Roudey","author_link":"https:\/\/www.marbre-import.fr\/en\/author\/qe0jqt2016ines\/"},"uagb_comment_info":0,"uagb_excerpt":"Investigate hollow-sounding or loose stone through installation method, adhesive coverage, substrate, moisture, movement and targeted opening-up.","_links":{"self":[{"href":"https:\/\/www.marbre-import.fr\/en\/wp-json\/wp\/v2\/pages\/248486","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.marbre-import.fr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.marbre-import.fr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.marbre-import.fr\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.marbre-import.fr\/en\/wp-json\/wp\/v2\/comments?post=248486"}],"version-history":[{"count":2,"href":"https:\/\/www.marbre-import.fr\/en\/wp-json\/wp\/v2\/pages\/248486\/revisions"}],"predecessor-version":[{"id":248739,"href":"https:\/\/www.marbre-import.fr\/en\/wp-json\/wp\/v2\/pages\/248486\/revisions\/248739"}],"up":[{"embeddable":true,"href":"https:\/\/www.marbre-import.fr\/en\/wp-json\/wp\/v2\/pages\/248269"}],"wp:attachment":[{"href":"https:\/\/www.marbre-import.fr\/en\/wp-json\/wp\/v2\/media?parent=248486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}