Crack in External garage brickwork showing damp

Discussion in 'Builders' Talk' started by pde100, May 15, 2018.

  1. pde100

    pde100 Member

    ah perfect! thanks very much indeed
     
  2. DaveF

    DaveF Active Member

    There are lots of different water seals you can buy. There are companies in fact that specialise in this. Most will guarantee their coating for between 5 and 15 years. You can even buy epoxy based clear paints that are of course completely water-tight.
     
  3. pde100

    pde100 Member

    That’s great help thanks. Is there much difference between the paint
    & the seals ?
     
  4. pde100

    pde100 Member

    Hi

    Sorry to bring this up Again. I noticed as on photo that the rain drips off the plastic fascia board under the felt in picture & drips onto the brickwork. The white fascia board seems to tilt in underneath so the drips go towards the brick. Is there some sort of pointed plastic strip I can put on it to point the rain away ?

    Thanks in advance
     

    Attached Files:

  5. KIAB

    KIAB Super Member

    I would get a small profile plastic bead & glue it in place,to form a drip bead.
     
  6. pde100

    pde100 Member

  7. KIAB

    KIAB Super Member

    Think this may be better, as it has a groove,set it back a bit from the edge.

    https://www.screwfix.com/p/alfer-white-pvc-flat-bar-15-5-x-2-x-1000mm/4729p

    Forgot to suggest adhesive:oops:, CT1 would be my choice, available in white & clear, but probably a silicone sealant might be enough to stick it.

    Sika Solvent Free Multi Stick Grab Adhesive from competitor would work, as it's a hybrid polymer adhesive.

    Can only find tech sheet here: https://www.sealantsandtoolsdirect....ab_adhesive_sf_ms_white_box_of_12_P29107.html
     

    Attached Files:

    Last edited: Nov 6, 2018
  8. pde100

    pde100 Member

    thanks very much, just to confirm do you mean, I glue it flat against the upvc under the felt, It seems thin but will this strip just create a small enough lip for the rain to clear the wall do you think?

    thanks
     
  9. KIAB

    KIAB Super Member

    Where my red line is drawn, set back 5mm -10mm from edge, difficult being accurate working from photo, should stop water running back toward & down wall.

    You may find 2mm thick profile ok,as the trim has a alignment groove, so that should help, but you might need a thicker profile say 5mm to form enough of a drip bead, can't be 100% as I'm here not there.
     
    Last edited: Nov 6, 2018
  10. pde100

    pde100 Member

    ah that's a great help thanks. Sorry I though the strip would stick out to form a lip but jut to clarify it shouldn't stick out from under the upvc?
     
  11. KIAB

    KIAB Super Member

    No, set it back, about 5mm should be enough, could always tape a length of the trim in place first to see how performs,& fine tune it, before gluing in place.:)
     
  12. pde100

    pde100 Member

    that's very helpful thanks, Sorry to ask stupid questions but why wouldn't I want a lip so the drips are further away from the wall rather than having it set back underneath?

    thanks
     
  13. KIAB

    KIAB Super Member

    From your photo I take water is running from felt down facia & then onto soffit & wall.

    Having it setback, should get water to drop off before it runs under soffit.
     
  14. pde100

    pde100 Member

    ah I see! great, thank very much for explaining
     
  15. pde100

    pde100 Member

    sorry one other thing, there is a crack in the brickwork, is it advisable to fill the crack with concrete or should I remove the cracked bricks and replace them

    thanks
     
  16. KIAB

    KIAB Super Member

    Post a photo.

    I always prefer to replace bricks, easy if you got a sds drill & a sds mortar rake (Heller from competitor, cheap & excellent) to remove the mortar.
     
  17. pde100

    pde100 Member

    ah ! good tip thanks very much, sorry just to go back to the original question if I used a drip bead with a lip so it didn't even touch the soffit would this cause a problem?

    thanks
     
  18. real-a

    real-a New Member

    Why would you want to protect the bricks from damp? Bricks breathe... All you do by waterproofing bricks is force the water to escape on the "other side". What do you have on the other-side of the brick? Naked Cavity, insulation, gypsum plaster? Where have you planned the natural water vapor to evaporate from? The last thing you want to do is sandwich bricks with impenetrable coverings, it will almost certainly give you damp in 1-2 years.
     
  19. pde100

    pde100 Member

    hi thanks for your comment, perhaps I don't fully understand how it works, but this is a garage so a single row of bricks. We had it converted a year ago and the put insulation boards with a wooden batons and then plasterboard on top. Outside as you can see the bricks have ben damp and are in areas with where rain drips on them which has caused the bricks to crack, so the builders suggested protecting bricks with a protector/ preservative which sort of made sense to me

    thanks
     
  20. KIAB

    KIAB Super Member

    Difficult to say without trying,what your trying to achieve is stoping water running down facia & continuing to the soffit then to wall.
     

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