{"product_id":"lamina-drenante-nodular","title":"Dimpled drainage sheet","description":"\u003cp\u003eProtecting buried basement walls against permanent moisture without the hydrostatic pressure of the ground water degrading the waterproofing over time, shielding retaining walls against mechanical damage during backfilling with earth and stones, and creating a ventilation chamber for breathable walls, requires a dimpled HDPE drainage membrane with calibrated dimples and compressive strength for buried use. This dimpled drainage membrane —also called a \u003cstrong\u003edimple sheet\u003c\/strong\u003e, or studded membrane— is manufactured by MOLTEXO in 700 g\/m² HDPE, in 2×20 m rolls, designed for buried walls, foundations, basements, tunnels and civil construction projects with problems of capillary moisture or groundwater.\u003c\/p\u003e\n\n\u003ch3\u003eKey benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir gap between wall and ground:\u003c\/strong\u003e the dimples create a circulation space between the wall and the backfill, where infiltrated water flows freely to the lower drainage without putting pressure on the structure, eliminating the hydrostatic pressure that ruins traditional walls.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMechanical protection of the waterproofing:\u003c\/strong\u003e the smooth outer face absorbs impacts from stones and compaction of the backfill, preventing damage to asphalt paint, bituminous felt or chemical waterproofing, which, with mechanical damage, loses its watertightness and allows permanent moisture to enter.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInert and durable HDPE:\u003c\/strong\u003e polyethylene is chemically resistant to moisture, biological attack (fungi, bacteria), soil alkalis and acids, plant roots and rodents, conditions for decades of service life when buried.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWall ventilation against capillary moisture:\u003c\/strong\u003e the air gap allows the wall to breathe and eliminate moisture accumulated by rising capillary action, a critical condition for basements in areas with high water tables in the Caribbean where capillary moisture is a chronic problem.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater reserve in green roofs and planters:\u003c\/strong\u003e the \"cups\" formed by the dimples retain small amounts of water available for the upper substrate between waterings, an additional technical advantage when the membrane is used as a combined drainage-retention layer in green roofs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical applications and uses\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBuried basement walls, stair walls and retaining walls with permanent ground moisture.\u003c\/li\u003e\n  \u003cli\u003eDeep foundations, footings and retaining walls in hydraulic works with hydrostatic pressure.\u003c\/li\u003e\n  \u003cli\u003eTunnels, underground works and service galleries with perimeter drainage.\u003c\/li\u003e\n  \u003cli\u003eGreen roofs and planters with a dual drainage-water retention function for the upper substrate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eQuality and durability\u003c\/h3\u003e\n\u003cp\u003eAn economical drainage membrane fails in two points: the HDPE is low-grade recycled (which produces dimples that flatten under the weight of the backfill and lose the drainage air gap) and the actual grammage is lower than declared (which produces a thin membrane that tears during backfilling with stones). MOLTEXO works with verifiable virgin 700 g\/m² HDPE, which separates a professional construction drainage membrane from a decorative membrane that fails after a few years under the buried wall.\u003c\/p\u003e\n\n\u003cdiv style=\"background-color: #F3F6F3; padding: clamp(14px, 4vw, 18px); margin-top: 20px; font-size: 0.9em; color: #555555; border-radius: 8px;\"\u003e\n  \u003cstrong style=\"color: #006902;\"\u003eAlso known as:\u003c\/strong\u003e\n  \u003cstrong\u003eTechnical:\u003c\/strong\u003e dimple sheet, drainage dimple sheet, HDPE dimpled sheet, alveolar drainage membrane, dimpled drainage sheet.\n  \u003cstrong\u003eIn DR and Caribbean:\u003c\/strong\u003e lámina drenante, membrana nodular, lámina con tetones, plástico drenante para muros.\n  \u003cstrong\u003eIn other countries:\u003c\/strong\u003e dimple sheet (USA), drainage board (USA), foundation drainage membrane (USA), lámina drenante (LATAM), membrane alvéolaire (FR), lámina nodular (LATAM, ES).\n\u003c\/div\u003e","brand":"MOLTEXO","offers":[{"title":"700 g\/m² (20.6 oz\/yd²) \/ Roll 2 m (6.6 ft) wide and 20 m (66 ft) long","offer_id":52268163891528,"sku":"875876","price":31500.0,"currency_code":"DOP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9751\/2776\/files\/lamina-drenante-nodular-hdpe-rollo-rd.png?v=1778208311","url":"https:\/\/dodom.com\/en\/products\/dimpled-drainage-sheet","provider":"Dodom","version":"1.0","type":"link"}