relative strength of cinder block verses concrete blocks

I am working on a basement bathroom renovation in a basement built in 1969. Fasteners for the firring strips state they are not to be used in cinder block walls, but are OK in concrete block walls. How can I tell what I have?

I am a homeowner and need to construct a cinder block wall 2ft high and 60ft long. I have dug a trench in clay type soil 16in deep and 16in across. No one (people I have asked) can seem to agree if I need rebar. I am using Quikrete #1101 concrete out of the bag and mixing it in a wheelbarrow....

The foundation in my Grandparents house was built in the 1950's with cinder blocks. Water is leaking through the blocks and if you lightly rub the blocks they are very soft. A white mold substance is on much of the surfaces. My dad told me that they did put a sealer on the exterior of the...

I need to repair a well house that has buckling cinder block walls. The well is below ground with a shed above it. The room is approximately 9' x 8' and 8' tall with cinder block walls and a concrete floor. The block did not have concrete poured in it when it was built, the blocks are beginning...

What is the difference between concrete block and cinder block when used in a home's foundation? What makes cinder block less desirable?