{"product_id":"polythene-dpc-30m-roll","title":"Polythene DPC – 30m Roll","description":"\u003ch2\u003e\u003cspan\u003ePolythene DPC – 30m Roll\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFlexible polythene damp proof course for creating a moisture barrier within brickwork and blockwork.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Installed as part of the masonry construction, DPC helps prevent moisture passing through the wall and causing damp problems above it.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAvailable in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e100mm and 450mm widths\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, both supplied as individual 30 metre rolls.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat is DPC?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDPC means Damp Proof Course.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is a moisture-resistant layer built into a wall to interrupt the path that water would otherwise take through the masonry.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn a typical wall, the DPC is bedded into a mortar joint so that moisture cannot simply continue travelling upwards through the bricks or blocks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is commonly used in:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHouse building\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eExtensions\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGarages and outbuildings\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBrick walls\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBlockwork\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRenovation and repair work\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGeneral masonry construction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eWhat is polythene DPC?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThis version is made from flexible polythene rather than a rigid material.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThat makes it straightforward to roll out, cut to length and incorporate into brick or blockwork while the wall is being built.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSamac describes its polythene DPC as designed to prevent the passage of moisture in brick and blockwork from external sources.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhich width do I need?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe width matters because the DPC needs to suit the masonry or construction detail in which it is being installed.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003e100mm × 30m\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e100mm roll\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is the narrower option.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is commonly suited to approximately 100mm-wide masonry sections, such as individual brick or block leaves, where a 100mm DPC is appropriate to the construction detail.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is likely to be the everyday choice where you simply need a narrow strip of DPC through a standard-width section of masonry.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003e450mm × 30m\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e450mm roll\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e provides a much wider moisture barrier.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eChoose this where the construction detail specifically requires a broader DPC across a wider masonry section or other wide damp-proofing detail.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is not simply a “better” version of the 100mm roll. Use the width specified for the wall or detail being constructed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDo not automatically use a wide roll to bridge a cavity or create a cavity tray.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Cavity trays and other details dealing with downward-moving water can have different product and installation requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e100mm or 450mm?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAs a simple guide:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e100mm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – narrow masonry sections and individual wall leaves where approximately 100mm coverage is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e450mm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – wide masonry or damp-proofing details where a 450mm strip has been specified.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf you're working from building drawings or a construction specification, use the DPC width shown rather than substituting a different width.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDPC vs DPM – what's the difference?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThese are easily confused.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eDPC (Damp Proof Course)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is normally a strip incorporated into walls.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eDPM (Damp Proof Membrane)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is normally a much larger sheet used beneath floors or slabs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAlthough both control moisture, they are not automatically interchangeable.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWho uses it?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003ePolythene DPC is primarily used by:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBricklayers\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBuilders\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGroundworkers\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eExtension and renovation contractors\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProperty maintenance trades\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eExperienced DIY customers carrying out masonry work\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eInstallation considerations\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe DPC needs to form a continuous moisture barrier through the relevant section of the wall.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBefore installation, check:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThe required DPC width\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThe wall construction\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThe position specified for the DPC\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRequired overlaps at joints\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eJunctions with other damp-proofing materials\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWhether the detail requires standard DPC, a cavity tray or another specialist membrane\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eFor new structural work, follow the building specification and applicable construction guidance rather than selecting the DPC solely by roll width.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eProduct details\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eProduct:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Polythene Damp Proof Course\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMaterial:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Polythene\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRoll length:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 30 metres\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWidths stocked:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 100mm and 450mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eApplication:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Moisture barrier in brickwork and blockwork\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e100mm supplier packaging:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 9 rolls per sleeve\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e450mm supplier packaging:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 2 rolls per sleeve\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWern-Wood sale unit:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Individual 30m roll\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePrice shown is for one individual 30 metre roll, not a full supplier sleeve.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Wern-wood","offers":[{"title":"100mm","offer_id":57193699705156,"sku":"ZZ100POLYDPC","price":3.34,"currency_code":"GBP","in_stock":true},{"title":"450mm","offer_id":57193699737924,"sku":"ZZ450POLYDPC","price":17.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0773\/7068\/7812\/files\/8c39f3cc-d90b-445d-99c6-7be2f6a25965.png?v=1788509625","url":"https:\/\/www.wern-wood.com\/products\/polythene-dpc-30m-roll","provider":"Wern-Wood","version":"1.0","type":"link"}