{"id":73101,"date":"2025-09-18T11:18:56","date_gmt":"2025-09-18T16:18:56","guid":{"rendered":"https:\/\/can.wrmeadows.com\/?p=73101"},"modified":"2025-12-11T16:44:39","modified_gmt":"2025-12-11T22:44:39","slug":"precon-winter-grade-canada","status":"publish","type":"post","link":"https:\/\/can.wrmeadows.com\/en-ca\/precon-winter-grade-canada\/","title":{"rendered":"PRECON WINTER-GRADE"},"content":{"rendered":"<p><a name=\"ds\"><\/a><\/p>\n<h3 class=\"section\">Product Data Sheet<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/can.wrmeadows.com\/pics\/hdgreen.jpg\" alt=\"Product Data, W. R. MEADOWS\" width=\"678\" height=\"150\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<table border=\"0\" width=\"100%\" cellspacing=\"2\" cellpadding=\"2\">\n<tbody>\n<tr>\n<td width=\"10%\"><strong><a href=\"https:\/\/can.wrmeadows.com\/data-sheets\/ca\/#071300\">07 13 00<\/a><\/strong><\/td>\n<td width=\"22%\">\n<p align=\"RIGHT\">DATA SHEET 5118-350<\/p>\n<\/td>\n<td width=\"18%\"><a href=\"https:\/\/can.wrmeadows.com\/data\/5118-350.pdf\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/can.wrmeadows.com\/pics\/pdfclick.gif\" alt=\"\" width=\"119\" height=\"23\" border=\"0\" \/><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>PRECON<sub><sub>\u00ae<\/sub> <\/sub>WINTER-GRADE<\/strong><br \/>\n<strong>Pre-Applied\/Underslab Waterproofing Membrane<\/strong><\/p>\n<p><strong>DESCRIPTION<\/strong><\/p>\n<p>PRECON WINTER-GRADE is a composite sheet membrane comprised of a non-woven fabric, elastomeric membrane, and W. R. MEADOWS&#8217; exclusive PLASMATIC CORE.\u00a0 The PLASMATIC CORE is a seven-layer matrix designed for toughness and provides the lowest water vapour transmission (WVT) rating on the market.\u00a0 Once concrete is poured against PRECON WINTER-GRADE and the concrete cures, a mechanical bond forms that secures the concrete to the membrane.<\/p>\n<p><strong>USES<\/strong><\/p>\n<p>PRECON WINTER-GRADE is used as a blindside membrane in vertical applications where access to the positive side is limited.\u00a0 The membrane can also be used for horizontal applications for underslab waterproofing and vapourproofing.\u00a0 This low\u00a0 temperature version can be installed in temperatures down to -7\u00b0 C and rising.<\/p>\n<p><strong>FEATURES\/BENEFITS<\/strong><\/p>\n<ul>\n<li>Provides a waterproof seal between the membrane and poured concrete wall.<\/li>\n<li>Helps prevent moisture migration into the structure.<\/li>\n<li>Helps reduce methane and radon gas intrusion.<\/li>\n<\/ul>\n<p><strong>PACKAGING<\/strong><\/p>\n<p>1.2 m (4\u2019) wide x 15.2 m (50\u2019) long rolls, one roll per carton.<\/p>\n<p><strong>STORAGE AND HANDLING<\/strong><\/p>\n<p>Store membrane cartons on pallets and cover if left outside. Keep materials away from sparks and flames.<\/p>\n<p><strong>APPLICATION<\/strong><\/p>\n<p><strong>Surface Preparation \u2026 <\/strong>Inspect all surfaces for any conditions detrimental to the proper completion of the work. Surfaces should be structurally sound. Remove debris or any other foreign material that could damage the membrane.<\/p>\n<p>PRECON WINTER-GRADE can be used with a caisson wall shoring system without the use of a drainage board, such as <a href=\"https:\/\/can.wrmeadows.com\/en-ca\/mel-drain-canada\/\">MEL-DRAIN<sub>\u2122<\/sub><\/a> from W. R. MEADOWS. W. R. MEADOWS recommends proper site drainage, but due to certain site conditions this sometimes cannot be done effectively. The decision to remove the drainage board should be at the discretion of the engineer. In situations where a drainage board is not applied, surface preparation is important. The substrate needs to be sound, solid, and smooth.\u00a0 Any gaps or voids &gt;25 mm (1\u201d) need to be grouted.\u00a0 When PRECON WINTER-GRADE is used with MEL-DRAIN from W. R. MEADOWS, the system can bridge gaps 50.8 mm (&lt;2\u201d).\u00a0 However, gaps &gt;50.8 mm (2\u201d) will need to be grouted.<\/p>\n<p><strong>Application Method \u2026 <\/strong>PRECON WINTER-GRADE can be used in temperatures down to -7 C and rising<\/p>\n<p>Prior to application of the blindside membrane, attach MEL-DRAIN<sub><sub>\u2122<\/sub> <\/sub>rolled matrix drainage system from W. R. MEADOWS to lagging or soil retention system.<\/p>\n<p>In vertical applications of PRECON WINTER-GRADE, mechanically attach with fasteners every 304.8 mm (12&#8243;) across the top, within 13 mm (\u00bd\u201d) of the top edge of the membrane.\u00a0 Install the membrane with the fabric side facing toward the concrete pour.<\/p>\n<p>Remove release paper on 152.4 mm (6\u201d) overlap.\u00a0 Apply membrane and roll press into place with a tile type roller.<\/p>\n<p><strong>End Laps \u2026 <\/strong>For optimum performance, <a href=\"https:\/\/can.wrmeadows.com\/en-ca\/hydralastic-836-canada\/\">HYDRALASTIC 836<\/a> from W. R. MEADOWS should be used for all end lap details and terminations.\u00a0 For detailed information, see <a href=\"https:\/\/www.wrmeadows.com\/precon-cold-weather-application\/\">PRECON COLD WEATHER APPLICATION TECHNICAL BULLETIN<\/a>.<\/p>\n<p><strong>Penetrations and Protrusions \u2026<\/strong> Detail around all horizontal and vertical penetrations using HYDRALASTIC 836.\u00a0 Apply HYDRALASTIC 836 by forming a fillet around the pipe or protrusion, overlapping the fabric side of PRECON WINTER-GRADE and the protrusion a minimum of 64 mm (2.5\u201d).\u00a0 If the gap between the protrusion and the membrane is greater than 13 mm (\u00bd\u201d), apply <a href=\"https:\/\/can.wrmeadows.com\/en-ca\/detail-fabric-canada\/\">DETAIL FABRIC<\/a> over uncured HYDRALASTIC 836.\u00a0 All penetration and protrusion surfaces must be clean, rust-free, and sound prior to application of HYDRALASTIC 836.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"73102\" data-permalink=\"https:\/\/can.wrmeadows.com\/en-ca\/precon-winter-grade-canada\/screenshot-2025-09-18-111258\/\" data-orig-file=\"https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111258.png\" data-orig-size=\"527,285\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Screenshot 2025-09-18 111258\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111258.png\" class=\"alignnone size-full wp-image-73102\" src=\"https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111258.png\" alt=\"\" width=\"527\" height=\"285\" srcset=\"https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111258.png 527w, https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111258-300x162.png 300w, https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111258-250x135.png 250w\" sizes=\"auto, (max-width: 527px) 100vw, 527px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"73106\" data-permalink=\"https:\/\/can.wrmeadows.com\/en-ca\/precon-winter-grade-canada\/screenshot-2025-09-18-111334\/\" data-orig-file=\"https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111334.png\" data-orig-size=\"498,383\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Screenshot 2025-09-18 111334\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111334.png\" class=\"alignnone size-full wp-image-73106\" src=\"https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111334.png\" alt=\"\" width=\"498\" height=\"383\" srcset=\"https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111334.png 498w, https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111334-300x231.png 300w, https:\/\/can.wrmeadows.com\/wp-content\/uploads\/2025\/09\/Screenshot-2025-09-18-111334-250x192.png 250w\" sizes=\"auto, (max-width: 498px) 100vw, 498px\" \/><\/p>\n<p>For horizontal applications involving a cluster of penetrations, again use HYDRALASTIC 836.\u00a0 Prior to application of HYDRALASTIC 836, prepare the surfaces of the penetrations as above and provide a block out using .6 x 1.2 m (2\u2019 x 4\u2019) lumber or other in order to create a \u201cpitch pan\u201d area to receive HYDRALASTIC 836.<\/p>\n<p><strong>Patching \u2026<\/strong> Prior to pouring, inspect membrane for punctures or damage and repair as necessary with HYDRALASTIC 836 and\/or DETAIL FABRIC.\u00a0 In addition, ensure the membrane is free of standing water and has been cleaned of any deleterious materials that will affect the bond of the concrete to the membrane.<\/p>\n<p><strong>Underslab Application \u2026 <\/strong>Refer to ACI 302.1R-04: Chapter 4 \u2013 Site Preparation and Placing Environment for sub-grade preparation prior to PRECON WINTER-GRADE placement.<\/p>\n<p><strong>PRECAUTIONS<\/strong><\/p>\n<p>Concrete should be poured within 60 days of membrane installation. When using bar supports, use those with a flat bottom.\u00a0 PRECON WINTER-GRADE should not experience temperatures above 49\u00b0 C due to air and sunlight exposure prior to concrete being placed.\u00a0 HYDRALASTIC 836, when applied at -7 \u00b0C), can take up to two weeks to fully cure. This is dependent on exposure to humidity during curing time. Low humidity will delay the cure time.<\/p>\n<p><strong>TECHNICAL DATA<\/strong><\/p>\n<table class=\"table\" width=\"100%\">\n<tbody>\n<tr>\n<td width=\"133\"><strong>Property<\/strong><\/td>\n<td width=\"183\"><strong>Test Method<\/strong><\/td>\n<td width=\"246\"><strong>PRECON WINTER-GRADE Results<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Thickness<\/td>\n<td width=\"183\">ASTMD 1000<\/td>\n<td width=\"246\">1.85 mm<br \/>\n(73 mil)<\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Low Temp Flexibility<\/td>\n<td width=\"183\">ASTM D1970, 180\u00b0 @ -32\u00b0 C<\/td>\n<td width=\"246\">Pass<\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Resistance to Hydrostatic Head<\/td>\n<td width=\"183\">ASTM D5385-93<\/td>\n<td width=\"246\">70 m (230\u2019)<\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Elongation, Polymeric Membrane<\/td>\n<td width=\"183\">ASTM D412-06<\/td>\n<td width=\"246\">&gt;400%<\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Tensile Strength, Film<\/td>\n<td width=\"183\">ASTM D882<\/td>\n<td width=\"246\">63.4 MPa (9200 psi)<\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Crack Cycling<\/td>\n<td width=\"183\">ASTM C836<br \/>\n@ -15\u00b0 F<\/td>\n<td width=\"246\">Pass<\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Puncture Resistance<\/td>\n<td width=\"183\">ASTM E154<\/td>\n<td width=\"246\">&gt;934 N<br \/>\n(&gt;210 lb.)<\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Peel Adhesion to Concrete<\/td>\n<td width=\"183\">ASTM D903<\/td>\n<td width=\"246\">1754 N\/m<br \/>\n(10 lb.\/in)<\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Moisture Vapour Transmission<\/td>\n<td width=\"183\">ASTM E96B<\/td>\n<td width=\"246\">0.0011 perms<br \/>\n(0.007 gram\/m<sup>2<\/sup>\/24 hr)<br \/>\n(0.0004 grains\/ft.<sup>2<\/sup>\/hr)<\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Radon Transmittance (m\/s)<\/td>\n<td width=\"183\">k124\/02\/95<\/td>\n<td width=\"246\">&lt;3.0 x 10<sup>-9<\/sup><\/td>\n<\/tr>\n<tr>\n<td width=\"133\">Radon Coefficient (m<sup>2<\/sup>\/s)<\/td>\n<td width=\"183\">k124\/02\/95<\/td>\n<td width=\"246\">&lt;5.6 x 10<sup>-12<\/sup><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>2025-09<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/can.wrmeadows.com\/pics\/foot-can.jpg\" alt=\"\" width=\"640\" height=\"98\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/can.wrmeadows.com\/pics\/footer-can.jpg\" alt=\"warranty\" width=\"614\" height=\"212\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PRECON WINTER-GRADE is a composite sheet membrane comprised of a non-woven fabric, elastomeric membrane, and W. R. MEADOWS&#8217; exclusive PLASMATIC CORE.  The PLASMATIC CORE is a seven-layer matrix designed for toughness and provides the lowest water vapour transmission (WVT) rating on the market.  Once concrete is poured against PRECON WINTER-GRADE and the concrete cures, a mechanical bond forms that secures the concrete to the membrane.<\/p>\n","protected":false},"author":1,"featured_media":48888,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[156,164,230],"tags":[],"class_list":{"0":"post-73101","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-concrete-waterproofing-en-ca","8":"category-sheet-en-ca","9":"category-vapor-barriers-en-ca","10":"entry"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pre-Applied Underslab Waterproofing Membrane | PRECON Winter-Grade \u2013 Installs to -7 \u00b0C - W. R. Meadows Canada<\/title>\n<meta name=\"description\" content=\"Discover PRECON Winter-Grade, a composite sheet membrane with PLASMATIC CORE for unmatched vapour protection. Designed for blindside and underslab applications, it bonds to poured concrete and installs in temperatures down to -7 \u00b0C. Spec: 1.2 m x 15.2 m rolls.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/can.wrmeadows.com\/en-ca\/precon-winter-grade-canada\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PRECON WINTER-GRADE (Canada)\" \/>\n<meta property=\"og:description\" content=\"Discover PRECON Winter-Grade, a composite sheet membrane with PLASMATIC CORE for unmatched vapour protection. 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