Unit 3 – Plaster – Construction and Building Materials Course – 2026 – Lecture Summary and Study Notes

What are the two main types of plaster?


Gypsum and Portland Cement


Gypsum is also called_____?


Sheet rock


Type (R) is what kind of sheet rock?


Regular core


What kind of sheet rock is fire resistant?


Type X


Type WR is what kind of sheet rock?


Water resistant


what are two other types of sheet rock?


Pre-finished wallboard and foil backed


Name three drywall screw types and their use.


Type W- wood screws
Type S- Sheet metal screws
Type G- Gypsum screws


Besides screws, what else is used as a fastener for dry wall?


Nails


What are five applications for gypsum plaster?


Over plaster bases, gypsum lath, metal lath, masonry, concrete


Is Portland cement used both inside and outside?


yes


When would you use portland cement?


in high moisture content areas