Hi All
My next project is tiling our front porch. This has a concrete floor; I
don't know if it has a DPM. I have been reading up on preparation and
testing whether there is a damp issue which will need to be treated.

Thee is currently some vinyl flooring thrown down there, and if I feel
underneath it is *slightly* damp. This might indicate that the floor will
need sealing beforehand (ugh, I'm hpoing not to do this).

However my feeling is that is is more likely due to condensation in the
unheated porch, rather than damp coming through the floor.

Any thoughts on whether I should be cautious or bold in my approach to this?
Recommendations for what product to use if I were to seal very welcome as
well. The porch is about 5 sq.m. in area BTW.

Thanks a lot
Jon N

The Night Tripper wrote:
Hi All
My next project is tiling our front porch. This has a concrete floor; I
don't know if it has a DPM. I have been reading up on preparation and
testing whether there is a damp issue which will need to be treated.

Thee is currently some vinyl flooring thrown down there, and if I feel
underneath it is *slightly* damp. This might indicate that the floor will
need sealing beforehand (ugh, I'm hpoing not to do this).

However my feeling is that is is more likely due to condensation in the
unheated porch, rather than damp coming through the floor.

Any thoughts on whether I should be cautious or bold in my approach to this?
Recommendations for what product to use if I were to seal very welcome as
well. The porch is about 5 sq.m. in area BTW.

Thanks a lot
Jon N



tiles are their own water barrier.

Think swimming pool.

No need for a DPM.

The Natural Philosopher wrote:


tiles are their own water barrier.

Think swimming pool.

No need for a DPM.

Ah - good. That's what I was sort-of hoping.

Thanks
Jon N

jkn wrote:

The Natural Philosopher wrote:


tiles are their own water barrier.

Think swimming pool.

No need for a DPM.

Ah - good. That's what I was sort-of hoping.

Thanks
Jon N

If you rely on the tiles to block damp, *do* use a suitably rated powered
cement based tile adhesive and powdered grout. Pre-mixed either is a lot
less resistant to damp weakening it.

--
Tim Watts

Hi Tim

Tim Watts wrote:

If you rely on the tiles to block damp, *do* use a suitably rated powered
cement based tile adhesive and powdered grout. Pre-mixed either is a lot
less resistant to damp weakening it.

Yes, I was planning to use as good a quality adhesive and grout as possible.

Thanks
J^n