Please Note: Due To Exceptional Demand Please Allow Up To 6 Weeks For Delivery. greenhouses Are Very Quick To Overheat. Not Only Do They Need Lots Of Ventilation But Some Sort Of Shading Is Essential In Order To Protect Precious Plants. Even As Early As March, Young Plants Will Need Shading On Sunny Days.roof Blinds For Harrod Greenhouse Only2ft Roof Blinds Will Fit Any Bay, Including A Bay Containing A Roof Vent, Allowing It To Open And Close Even With The Automatic Vent Opener!side Blinds For Harrod Greenhouse Only 2ft, 4ft And 6ft Blinds Are Available. They Simply Slide On The Eave Section And Are Very Easy To Fit And Remove.only An Exterior Blind Can Reduce Heat Buildup As Well As Provide Shadethere Are Ways Of Fixing Shading Fabric To The Inside Of The Greenhouse With Clips But Whilst This Method Provides Shading, The Sun Has Already Hit The Glass And Raised The Temperature Inside The Greenhouse.the Harrod Greenhouse Blind Is A High Quality Exterior Roller Blind Made From Rust Proof Aluminium, With A Grey Fabric Designed Especially For Horticultural Use And Designed For Harrod Greenhouses Only.this System Not Only Stops The Heat Build Up And Shades Tender Plants But Is Also:very Simple To Operatefree Of Cords Or Pulleysrobust And Looks Great Too!harrod Greenhouse Blinds Could Not Be Simpler To Operate. Just Pull The Central Handle Down With The Pole And Clip It To The Greenhouse Eave Or Bracket Supplied. No Cords Or Pulleys Are Involved At All. The Blinds Do Not Impede The Operation Of The Roof Or Louvre Vents, They Simply Expand Or Contract As The Window Opens And Closes. The Blinds Are Surprisingly Good In Windy Conditions - The Weight Of The Fabric, Bottom Bar And Clip Combine To Hold The Blind Firmly In Place.