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Greenhouse shading

Discussion in 'Home and Garden' started by adwol48, 14 May 2020.

  1. adwol48

    Hitman

    Joined: 25 Dec 2008

    Posts: 853

    Location: Norwich

    So when we bought our house the previous owner had a greenhouse put in on a concrete base, this concrete base has been the cause of my problems on a normal day the greenhouse can reached upwards of 35C and the hottest I've ever seen it was over 50C a couple of weeks back this obviously scorches everything inside i have tried different shade nettings etc but none really help, a neighbour advised I buy some of this paint on white shade for the glass and after looking around online and seeing it for 17 quid a bottle i went to my local garden centre today and bought 2 bottles for £14. Got home checked the temp inside at 33C and began to paint after it had dried and given sometime to work I walked in and it was down to 20c a vast improvement and maybe this year my tomatoes wont all be scorched to death.
     
  2. gav_172

    Gangster

    Joined: 17 Nov 2015

    Posts: 110

    Are you putting the shade netting on the inside or the outside? I have netting on both of mine on the outside and it works really well combined with automatic vent openers.
     
  3. adwol48

    Hitman

    Joined: 25 Dec 2008

    Posts: 853

    Location: Norwich

    Had it on the outside and inside I have auto vent openers. during the day the door is left open because my garden is southwest facing the greenhouse gets sun all day long. As I said the main issue for me is the concrete base of the greenhouse my neighbour who has his green house on the opposite side of the fence to me has no problems at all as he has soil floor. The vitrix suimmer cloud shade I bought seems to have done the job though its kept the temp below 30C today after I applied it.
     
  4. kinobestew123

    Wise Guy

    Joined: 6 Feb 2008

    Posts: 1,711

    Could you put some soil on the floor? Or woodchippings or something? Even a thin layer may stop the concrete heating.
     
  5. Semple

    Soldato

    Joined: 5 Mar 2010

    Posts: 7,433

    I do know that feeling. I've got one of those freestanding greenhouses. We've got a South facing garden and it can reach 50C on a hot day if I forget to leave the door open.

    I did actually move it to the other side of the garden last weekend, so that it's protected a little bit from the afternoon sun.
     
  6. moon man

    Mobster

    Joined: 17 Nov 2003

    Posts: 3,163

    Location: St Breward Cornwall

    Mines got a top window I've never fixed, and grape vines growing in there, I put my water loving stuff under the missing window, no excess heat issues I don't think, my spinich is going mad, my curry's are now crammed with it
     
  7. adwol48

    Hitman

    Joined: 25 Dec 2008

    Posts: 853

    Location: Norwich

    yep tried that last year got two 35l bags of bark on the floor.
     
  8. Blackjack Davy

    Mobster

    Joined: 16 Aug 2009

    Posts: 4,172

    How much?! Greenhouse shading usually comes dry in sealed packets you tip in a bucket mix a little water till its a paste then add water to dilute then paint it on. Usually costs around a fiver. Then just rub it off when its dry for winter light. One sachet should be enough for a 6x8

    The other thing is ventilation most glasshouses don't have enough a roof vent plus some louvre vents low down to allow circulation and leave the door open if the weather is sunny and warm or it'll rapidly overheat this time of year.
     
  9. adwol48

    Hitman

    Joined: 25 Dec 2008

    Posts: 853

    Location: Norwich

    i bought enough to do 4 8x6 greenhouses this was a thick liquid you dilute 8 to 1. well the roof vent is constantly open thanks to the auto vent and i always open the door every morning. the paint on shade has been the key without it i think everything would be scorched already.
     
  10. psd99

    Soldato

    Joined: 7 Sep 2008

    Posts: 5,020

    Mine has two windows
    Without that it was be incredibly hot