I have my shed almost finished.....I poured slab, then one row of concrete
blocks, and then built shed....It rained quite a bit last night and I
noticed some wetness at the mortar joint between slab and concrete blocks in
a couple of places along one wall only. the top of the slab is at least 4
inches above grade. I guess water is passing through mortar.......Do I
need to seal mortar joints somehow? any advise appreciated...

On Oct 30, 1:41*pm, wrote:
I have my shed almost finished.....I poured slab, then one row of concrete
blocks, and then built shed....It rained quite a bit last night and I
noticed some wetness at the mortar joint between slab and concrete blocks in
a couple of places along one wall only. the top of the slab is at least 4
inches above grade. I guess water is *passing *through mortar.......Do I
need to seal mortar joints somehow? any advise appreciated...

Brush a couple of coats of cementitious waterproofing, such as
Thoroseal, on the outside of the block and lapping it onto the
concrete. It comes in gray/grey and white.

How much of a roof overhang do you have on the shed?

R

The roof overhang is about 10 inches.

On Oct 30, 2:05*pm, wrote:
The roof overhang is about 10 inches.

That's reasonable for a shed. I was asking because I've seen quite a
few sheds where there is no overhang and the lower parts of the
building take a bigger beating from the weather over the years - they
rot more quickly.

R

On Oct 30, 2:05*pm, wrote:
The roof overhang is about 10 inches.

That's reasonable for a shed. I was asking because I've seen quite a
few sheds where there is no overhang and the lower parts of the
building take a bigger beating from the weather over the years - they
rot more quickly.

R

On Fri, 30 Oct 2009 17:41:12 GMT, wrote:

I have my shed almost finished.....I poured slab, then one row of concrete
blocks, and then built shed....It rained quite a bit last night and I
noticed some wetness at the mortar joint between slab and concrete blocks in
a couple of places along one wall only. the top of the slab is at least 4
inches above grade. I guess water is passing through mortar.......Do I
need to seal mortar joints somehow? any advise appreciated...


There are products specifically for concrete. I used a white sealer
that contains both rubber and concrete to paint my basement poured
walls. Either at Lowes or Borg. For cracks there is a caulk specific
for concrete.

Phisherman wrote:
On Fri, 30 Oct 2009 17:41:12 GMT, wrote:

I have my shed almost finished.....I poured slab, then one row of concrete
blocks, and then built shed....It rained quite a bit last night and I
noticed some wetness at the mortar joint between slab and concrete blocks in
a couple of places along one wall only. the top of the slab is at least 4
inches above grade. I guess water is passing through mortar.......Do I
need to seal mortar joints somehow? any advise appreciated...


There are products specifically for concrete. I used a white sealer
that contains both rubber and concrete to paint my basement poured
walls. Either at Lowes or Borg. For cracks there is a caulk specific
for concrete.

and use the products on the OUTSIDE not the inside. don't want moisture
trapped inside the block.

nate

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