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Waterproof sliding door glued to shed slab? (aussie.zone)

submitted 1 year ago* (last edited 1 year ago) by DerMeisenmann@aussie.zone to c/homeimprovement@lemmy.world

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Hi all,

When I installed this sliding door, I foolishly put it straight on the slab thinking exterior sealant would be sufficient to keep water out.

Unfortunately it’s not…

Every time it rains heavily I get water creeping underneath it or collecting in the track and then seeping through.

Is there any waterproofing fix you guys can think off, that doesn’t involve taking the door (frame) out, shaving some of the header above it off, adding a sub sill and proper flashing tape underneath the track?

Also, would some concrete crack filler be sufficient to prevent water creeping through the crack in the slab?

Many thanks in advance!

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[–] ZooGuru@lemmy.world 8 points 1 year ago

You could try concrete crack filler, but concrete is porous. I would recommend a concrete curb that would help to push the water off to the edges. Water will take the path of least resistance. You just want that to not be into your shed.

[–] atempuser23@lemmy.world 3 points 1 year ago (1 children)

Without a real sill and a slope on the outside your going to have water intrusion. Add a gutter/diverter above the door on the roof. Remove all the sealer you can. Use waterproof concrete sealer/paint on the slab. Fill every gap you can with silicone. Shave down the slab with an angle grinder to add some kind of slope.

If the concrete applier 'forgot' to add a slope to the outside see if they will help with the remedy.

[–] DerMeisenmann@aussie.zone 1 points 1 year ago (1 children)

Thank you for all your very useful suggestions!

Do you think cutting a draining channel into the slab just outside the door (instead of sloping the entire slab) could also work?

[–] atempuser23@lemmy.world 1 points 1 year ago

Maybe? When it rains you need to move lots of water fast. It'd need to be a serious channel

[–] Jsocial@lemmy.world 3 points 1 year ago

It seems like the water is probably getting higher than the sealant. At that point, it's almost certainly a manufacturing thing with the door that you can't easily fix. A sill would be the best bet imo.

[–] oleorun@lemmy.fan 2 points 1 year ago (1 children)

Do you have eave troughs there by chance?

[–] DerMeisenmann@aussie.zone 1 points 1 year ago

No, the gutters and downpipe are on the other side. There is a bit of flashing above the door though.

Do you think water could be leaking from there?