On Saturday, 28 April 2018 08:53:21 UTC+1, wrote:
On 28/04/2018 08:30, tabbypurr wrote:
On Friday, 27 April 2018 22:01:37 UTC+1, Tim Watts wrote:
On 27/04/18 16:30, tabbypurr wrote:
As someone said it may dry out once it's all exposed, then no further action needed, just don't re-cover it.

+1

If that doesn't do it, probably time to seal it. But be aware that doing so can sometimes make the walls very damp. Any waterproof coating can dampproof it, eg epoxy, bitumen, etc. Epoxy is the longest lasting. Bitumen's cheap but not good in direct sunlight. You can also get other types of waterproofing compounds.


Bitumen is also a nightmare if you then want to apply any bonded
covering later - nothing sticks to it, except more bitumen.

bonded coverings can be stuck down with bitumen... it's not an ideal glue but it works.


NT

Having recently re-laid a 1930s parquet floor that was laid on bitumen I
don't see why anyone would choose to use the stuff these days.
Supposedly Sika 5500S works with bitumen, but I scraped off most of the
bitumen before using it.

it's cheap, long lived & 100% waterproof. Why would you use Sika?


NT