Ayan, di ka kasi nag-invite ng mga tsikot forumers sa house warming nyo. :D

One option is to use waterproofing sealant and/or elastomeric paint. Check first for hairline cracks and water seepage sources before sealing. If you seal it, baka gumapang lang yung water to another part and it will be harder to trace later on.

Pwede rin, pag umuulan ng malakas, ilipat mo sa garage or balutan ng plastic yung bahay para di mabasa. :D