Flatroof and Wet Wall Problem Inside and Out

Hi All.

We have a garage attached attached to the side of our house. It has a flat roof which covers not only the garage but the porch entry to the main house. We had plans this year to change the flatroof to a pitched roof, convert the garage to a proper living space, but we had a difficult year and it didn't get done and we'll now have to delay till the spring.


Unfortunately with the recent rain we've noticed that the flatroof has become damaged and the garage wall underneath the damage has become very wet and remains wet, the wall on the inside of the porch (which is inside a cupboard) is damp to touch and there's the beginnings of some mouldy areas. This corresponds to the wet wall outside.



Ultimately I know we will need to get the flatroof repaired/replaced but as this isn't an option right now, is there anything we can use to treat both the inner and outer wall?



I'm aware it's not a permanent fix, but we're hoping for something which could potentially see us through the winter? Do the masonry creams work? We're not sure if this is also a cause of the wet (probably) but it looks as though the wooden fascia board in that area have got wet and are rotting, is there anything we could do to cover the boards temporarily to stop potential rain seeping in.


I know it's a lot of temporary fixes, we don't care what it looks like just hoping people may have some ideas. Thanks in advance.

Comments

  • FreeBear
    FreeBear Posts: 14,595 Forumite
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    Quick and dirty fix - Get some tubes of silicone sealant from somewhere like Poundland. Get up on the roof and fill any cracks with a generous dollop of sealant. Nail some plastic over the fascia boards making sure the plastic is tucked under the roof.

    Chances are, you'll find water is getting in behind any felt that is up against the wall of the house. This would require a little more thought in fixing. Perhaps look at some self adhesive flashing from Screwfix or some other DIY store.
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  • nad1611
    nad1611 Posts: 710 Forumite
    Great. Sounds certainly doable, I'll look into this today whilst it's not raining,thanks very much for this.
  • When you get around to doing a proper job, you must get Building Control. Don’t let cowboy builders loose without qualified inspection of the works. Many garage conversions are left with long standing damp and condensation problems, get professional advice from a third party.
  • nad1611
    nad1611 Posts: 710 Forumite
    Of course. We already had contact for Building Regs and we always use the same tried and tested builders so no worries there,thanks.
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