Replies

1. 
   pm22 | Jul 03, 2005 07:29am | #1

   The concrete surface is very rough with lots of "caves" in it. All I know is to give it a light spray or mist of water before applying the first coat. This will enable the acrylic to enter the pores and "caves". Then apply a second coat.

   But a well-built pump system shpuld be leak proof and not damp -- exept for condensation. Perhaps a ventelating fan is needed or paint the interior walls with Thompson water seal.

   ~Peter

2. 
   Dinosaur | Jul 03, 2005 08:43am | #2

   You gotta get the chalkiness off the blocks; I'd spray it with muriatic acid, scrub it with a stiff deck brush, and then pressure wash it. Use an epoxy  floor paint meant specifically for concrete once it dries out.

   Dinosaur

   A day may come when the courage of men fails,when we forsake our friends and break all bonds of fellowship...

   

   But it is not this day.

3. 
   IronHelix | Jul 03, 2005 02:20pm | #3

   FWIW............

   The moisture inside the pump house migrates through the blocks to the back side of the exterior paint membrane.

   And since that membrane is "water tight" the moisture eventually pushes the paint off the block.

   You may find that your new paint job will soon look like the current peel and flake show.

   Maybe you would be better off with a white grade of dry stack block coating...it should have a better chance of allowing moisture to migrate.

   Or paint the inside, too!

   .......................Iron Helix

1. 
   Notchman | Jul 03, 2005 07:42pm | #4

   I agree with Iron Helix.

   I use a cementous waterproofing for concrete block called Tamoseal....mixed with an acrylic admix and "parged on with a big stiff brush.  Usually it is for exterior and below grade use, but in your situation it would likely work for the interior, although the surfaces should be prepped as I H suggests.