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sealing concrete roof on garden shed

  • 24-12-2012 9:11am
    #1
    magicbastarder
    Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 50,891 CMod ✭✭✭✭


    i've just bought a house which is approx. 60 years old, and there's a shed (contemporary to the house, i'd be fairly certain) out the back i was hoping to store firewood in.
    problem is, it's a concrete roof, and when it rains, the water slowly leaches through to the shed below. what's the best way of sealing this? is the concrete too porous to seal without wrapping the roof in felt?


Comments

  • #2
    dodzy
    Registered Users, Registered Users 2 Posts: 10,153 ✭✭✭✭dodzy


    magicbastarder wrote: »
    i've just bought a house which is approx. 60 years old, and there's a shed (contemporary to the house, i'd be fairly certain) out the back i was hoping to store firewood in.
    problem is, it's a concrete roof, and when it rains, the water slowly leaches through to the shed below. what's the best way of sealing this? is the concrete too porous to seal without wrapping the roof in felt?
    A roll of torch on felt - €40. Job done.


  • #3
    mountai
    Registered Users, Registered Users 2 Posts: 963 ✭✭✭mountai


    Dont forget to apply a Bitumastic Primer before you put the felt on.


  • #4
    North West
    Registered Users, Registered Users 2 Posts: 439 ✭✭North West


    Hi. There is a product on the market called Butyl rubber. Its a rubber film and is glued around perimeter of roof, some road chippings and job is done. Ihave a roof done over 20 yrs still perfect. Price I don't know. Google butyl rubber
    NW


  • #5
    paddy147
    Banned (with Prison Access) Posts: 15,858 ✭✭✭✭paddy147


    A 10 litre drum of Rito Waterstop.


    Around 60 euro for it...instantly waterproofs any material and is ideal for outdoor use too

    Used for below ground on foundations and also for tanking bathrooms,basements and concrete roofs.


    Woodies sell it,but you will get it alot cheaper in a builders providers


  • #6
    Odelay
    Registered Users, Registered Users 2 Posts: 3,921 ✭✭✭Odelay


    Are you sure it isn't condensation?
    No matter how water tight the roof is, warm air meets cold surface it will happen. It shows as many beads of water on the ceiling. Not to be under estimated.


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  • #7
    magicbastarder
    Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 50,891 CMod ✭✭✭✭magicbastarder


    i had considered that, but there's no real source of moisture in the shed; and it's not insulated in any way, either, so would generally be at ambient temperature.
    i don't intend to insulate it, and certainly have no intentions of making it more airtight, given that the ultimate aim would be to partially season wood in it over the spring/summer/autumn...


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