Block wall Prep ????

[Fabric8r]

Hello. I recently purchased an old Shop that has ben very porly maintained. it has concrete block walls. They have ben painted, but not anytime recent.
My questions are. what is the most recomended way to prep the walls before i try to frame and insulate. I have OCD when it comes to projects. i like to do it the right way the first time or ill always think about it and wish i would have just did it right to start with.
My thought would be to sandblast or corn cob blast the walls then re-seal and then paint with something like kills. Do you think this is over kill? Is blasting the wall and re sealing them necessary, or would that just be money wasted?

Thanks in advance, Scott

 

[Steve.S]

Scott,

Consider scraping off any loose paint and then repainting with something like UGL Drylok paint. I've done this on basement walls before framing and insulating. Cheap insurance against water leakage, especially with a surface that will be hidden.

Blasting the wall isn't necessary as long as your scraping removes all loose paint.

 

[BPJOOP93]

Clean off loose paint
reseal with a good quality water locking paint....drylock
glue styrofoam to wall
stud wall about an inch from the styrofoam
insulate the studded wall
rock the wall
very good at keepin you warm
This is what i did in my basement and its been great for almost 10 years
its about 7-9 degrees warmer down there than it is upstairs

I know its a basement not a garage but the same principles apply

 

[deter]

have you considered insulating the outside of the building instead of the inside?

 

[LutzTD]

before you get too excited about cleaning off the paint, try to find out when it was painted. If its older than 1978 it could be lead paint. If its lead paint better to seal it and cover it than to try to take it off. you really dont want to have lead everywhere for something your going to cover anyway.

 

[Fabric8r]

Thank you all for your info! yes i looked into the UGL drylock paint. looks like good stuff. i have also thought about trying to contact previuous owners to find out if it may be led based paint.
I'm glad to hear that most are just saying scrape off loose paint which i dont think there is much of. which i would think is a good indication that the wall was sealed ok. and paint over with a good water resistant paint.
The building smells very moldy im thinking most of that is caused by the roof leaking. I have to take care of that problem first. Then i will wash the walls down with a good mold killer and sand before i paint.
Thanks for any and all input !!!!

 

[brownbagg]

i use ugl drylock, and i do like it. but i wouldnt do anything but just start framing