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 FLOORS, STAIRS, AND ENTRANCES
N.
General Considerations:
Where floors are continually wet, provide trenches or drains and consider
integrally poured concrete curbs and sills.
Avoid open-slot expansion joints.
For concrete slabs on grade:
a. Welded wire mesh should be 1 inch from the top.
Use chairs to hold
in-place; no wood supports.
b. Do not pour concrete slabs in direct contact with masonry walls or
interior column piers. Provide proper joints around columns and along wall
perimeter.
c. Install vapor barrier under slabs and perimeter insulation along
foundation walls.
d. Do not allow hand troweling before concrete has set up enough to
give a ringing sound if struck by a trowel. (Do not allow water to be
sprayed on concrete to ease troweling or dry cement to be sprinkled on
concrete while troweling.)
e.
Concrete for industrial floors should be hardened or sealed.
f. New or existing concrete floors should not normally be painted,
except in special cases where polyurethane reflective finishes can be used.
Consider the following when selecting floor finishes:
a. Moisture, soiling (abrasiveness/staining), chemicals, wheel loads,
dropped objects, movable furniture, foot traffic and traffic patterns.
b.
Appearance, ease underfoot, acoustics, and room comfort.
Use dark grout with ceramic tile bath floors.
Consider epoxy grout in heavy
use areas.
Follow the carpet policy in AFR 88-15, Attachment 3, Wear Classification
(avoid solid colors; use tight woven plush-cutpile or level loop with
pattern), and the HQ PACAF Carpet Policy Guide, 1989. Also consult PACAF
"MAKE IT BETTER" Guidance.
Avoid resilient tile for stair treads and landings.
Use carpeted landings,
which are beneficial as a soil trap.
Use good tread surfaces of formed synthetic materials and risers not
requiring painting.
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