Benefits of Green RoofsGreen roofs address many of the key issues associated with climate change: extremes of weather resulting in unpredictable periods of excess rainfall, drought, heat and cold stress.They:

Promotebiodiversityandcreateanaturalhabitat, encouraging a wide range of insects, birds and butterflies, particularly in areas where the habitat has been lost.

Absorbrainfallthatwouldnormallyrunstraight off hard surfaces and are therefore important to help with storm water attenuation and reducing urban flooding.

Helptocombattheeffectsofpollutionthe green plants absorb noise, trap dust, recycle carbon dioxide, absorb and break down many gaseous pollutants.

Reducetheurbanheatislandeffectandthe energy costs associated with keeping buildings cool in hot weather.

Green roofs are created when living plants are grown on a roof structure. A common feature in Europe, there is an increasing number of green roofs in the United Kingdom.

Newconstructiontechniqueshavecreatedendlessopportunitiesformanydifferenttypesof greenroofs.Inparticular,technologyforthecreationofextensivegreenroofshasbeendeveloped,wheretheplantschosenrequireminimalmaintenanceandwillflourishinrelativelyshallow substrate depths which are lightweight and require no specific support.

One of the most exciting aspects of green roofs is their potential to support life in situations that would otherwise be largely barren and sterile.

ProfessorNigelDunnett,UniversityofSheffield

lindum green roofs

technical information sheetLINDUM GREEN ROOFS

Lindum Green Roof MatsSustainablygrownintheUKandsuppliedasaready-to-roll-outmattocreateaninstantvegetationlayer,therearetwomainmixturesavailable:

Lindum Sedum & Wildflower MatAmixofwildflowers,sedum and herbs with a prolonged flowering periodtoprovidebiodiversityandvisualimpact. For more information see: Lindum Sedum&WildflowerMattechnical sheet.

Lindum SedumPlusTM MatSixteencolourfulvarietiesfor extended interest and colour throughout the flowering period. For more information see: Lindum SedumPlusMattechnicalsheet.

Other products available

Lindum Low Maintenance Grass Mat and Lindum Wildflower&MeadowGrassMat.Forfurtherdetailsemail: lindum@turf.co.uk

WhychooseLindumGreenRoofMats? Sustainably grown in the UKproductsdesigned

specificallyfortheUKclimate.

Choice of sedum and wildflower mixtureschosentothriveingreenroofsituationsandattractpollinators.

Biodiversitythevarietyofplantspeciesprovidesan important habitat for bees, butterflies and insects.

Visual impactmatscontainarangeofplantschosen for an extended flowering season and to createavisuallypleasingeffect.

Drought toleranttheplantsarechosentowithstandperiodsofdrought.Afterestablishmentthere should be no need for irrigation except in prolongeddroughtorwhereaestheticvalueindryperiods in important.

Lightweightmatsarelightweightanddesignedtogrow in minimal substrate depth.

Easy to installsimplyrolloutlikeacarpet.

Low maintenanceLindumsgreenroofproductsonly require one cut a year in autumn.

Rapid deliverygrowninUK,deliveryonsiteisrapid,meaningplantsarrivefresherwithabetterchance of establishment. See www.lindumgreenroofs.co.uk

WorkingcloselywiththeUniversityofSheffieldsProfessorNigelDunnettandthe Green Roof Centre, Lindum has developedarangeofwildflower,sedumandherbmixturesspecificallytoprovideabiodiverse,colourfulanddroughttolerantvegetationthatwillflourishintheoftenextreme or harsh conditions created on anextensiveGreenRoof.

Basic profile of an extensive green roof

Lindum Vegetation Layer

PROFILEOFA LINDUMGREEN ROOF

Lindum Substrate

Filter mat

Water reservoir

Protective layer

Insulation Layer

Roof Deck

Roof Drain

Waterproof Membrane

Vegetation LayerAllLindumsgreenroofvegetationmatsaresustainablygrownintheUK.Lightweightandeasyto install, they are supplied ready to roll out as an instantvegetationlayer,withtheplantsestablishedand growing in a strong felt mat made from recycled British textiles.

LightweightSubstrateLindumsExtensiveGreenRoofSubstrateisablendof100%recycledcrushedbrick(2-5mm)andgreenwastecompost(0-10mm).Thespecially matured and graded recycled green wastecompostprovidesoptimalstabilityandminimal leaching of organic matter and nutrients. The compost is mixed with carefully selected and graded clay aggregate made from recycled UK-sourcedcleanbrickandtile.Thesubstratehasanair-filledporositygreaterthan20%v/vtoprovidegooddrainage,strongrootactionandrobusthealthygrowth.Availablein1m3 tote bags, 20litreheat-sealedbags,orinbulk,LindumsExtensiveGreenRoofSubstrateprovidesahighquality green roof growing medium with green provenancei.e.peat-freederivedfrom100%recycledUK-sourcedmaterials.

Alsoavailable:

LindumBrownRoofSubstrate:5-14mmgradebrickwith10-25mmcompost

LindumExtraLightweightRoofSubstrate:basedonLECAaggregate

LindumLawnRoofSubstrate:incorporatessterilized reclaimed soil

DrainageLayerLindums drainage layer product, Roofdrain, is idealforextensivegreenroofsasitprovidesalightweightdrainagelayerwithawaterreservoirtosustain plant growth. Roofdrain attenuates rainfall makingitanimportantelementofaSUDSsystem.Roofdrain consists of a perforated cuspated recycledHDPE(highdensitypolyethylene)corewith selected geotextiles thermally bonded on each side.Thecoreactsasawaterreservoirholding4.5-5.5litrespersquaremetreforplantstoaccessin dry periods. The core is perforated to allow excess rainwater to flow into the underside and away to drainage outlets. The upper geotextile acts asafilter,preventinganyfineparticlesfromthesubstrate blocking the drainage layer. The upper geotextile also has a zero breakthrough head to preventover-saturationofthesubstrate.Thelowergeotextile has two key functions: it offers additional protection to the waterproof membrane and acts asanextramoistureretentivelayer,holdinganadditional 1.0 litres per square metre. This further enhances the water holding capacity of the system andslowstherateofrun-off.TheRoofdrainismanufacturedintheUKfromupto95%recycledmaterialmakingitasoundenvironmentalchoice.

WaterproofMembranePleasecontactLindumforinformationonwaterproofingforbothnewbuildandretro-fitgreenroofs. Lindum can supply details of specialist waterproof membrane suppliers.

Rootbarrier LayerWhenusingwaterproofmembraneswithoutalifetimerootpenetrationguaranteeorforretro-fit green roofs where the waterproof material is unknown, an additional root barrier layer should be used. Lindum can supply Rootbarrier:

ContactLindum Turf, West Grange, Thorganby, York, YO19 6DJ

t: 01904 448675f: 01904 448713 e: lindum@turf.co.ukw: www.lindumgreenroofs.co.uk @lindumgreenroof

Furtherinformationaboutgreenroofsisavailable.

In conjunction with the Green Roof Centre, Lindumcanprovideconsultancyforlargeprojects.

Adviceontheconstructionofgreenroofsisavailablefrommanysourcesincluding:www.thegreenroofcentre.co.ukwww.greenroofguide.co.uk

SupplySubstrates,drainagelayersandedgingsuitable for green roofs can be supplied as a green roof package.

Lindumcanprovidedetailsofspecialist waterproof membrane companies.

Further informationFormoreinformationonvegetationlayeroptions, or Lindums green roof package, visitourwebsiteorcontactustorequestaspecification sheet.

anonwoven,100%polypropylenegeotextile, made from continuous heatbonded filaments with an extruded coating. Rootbarrier is impenetrable to roots, strong and flexible, lightweight and easy to install.

VegetationBarrier&EdgingDetailsA300-500mmwidelayerof20-40mmwashedpebblesorgravelshouldbeappliedasavegetationbarrieraroundtheperimeteroftheroofandaroundanyroofpenetrations(drainageoutlets)orroofopenings(skylights,windows).Lindumcansupplyaluminiumvegetationbarrierandedging.