March, 1923 
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r he actual thick- 
less of a sheet of 
Sheetrock is 
fg-in. of pure 
>ypsum plaster 
What it is: Sheetrock is a wallboard made of gypsum 
and gypsum is a rock. It is gypsum plaster cast in 
sheets. It is fireproof, non-warping, and rigid. It can ic 
sawed and nailed. It takes any decoration: wall paper, 
paint or panels. 
What it does: Sheetrock makes smooth-surfaced, tight- 
jointed, permanent walls and ceilings—standard walls 
and ceilings that keep rooms warm in winter and cool 
in summer. It makes walls and ceilings that are sound¬ 
proof, vermin-proof and fireproof. 
Where it is used: Sheetrock is the economical wall and 
ceiling material formany types of new construction and 
for all remodeling, alterations and repairs. It is being 
used now in residences costingupwardof $20,000. It is 
just the thing for attic rooms, furnace rooms, fruit cellars, 
play rooms, garages, offices, stores, and warehouses. 
How it is used: Sheetrock comes in broad, ceiling-high 
sheets, factory cast and uniformly gauged for smooth¬ 
ness and thickness. The carpenter simply nails the 
sheets to the joists or studding. 
Who sells it: Your dealer in lumber or in builders’ 
supplies sells Sheetrock. Ask him about it. 
UNITED STATES GYPSUM COMPANY 
General Offices : 207 West Monroe Street, Chicago 
World's Largest Producers of Sheetrock is approved by The Under- 
Gypsum Products writers’ Laboratories , Inc. 
UNITED STATES GYPSUM COMPANY 
207 West Monroe Street, Chicago, Ill. 
Gentlemen: I am thinking of 
building □ remodeling □ making repairs □ 
Please send me a free copy of your illustrated booklet, “Walls of 
Worth.” and samole of Sheetrock. 
Name. 
Address 
Reg. U. S. Pat. Off. 
THE Fireproof 
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