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 THEN LOOK FOR (Cont.):
Rising damp
Ivy or other vegetation
Damaged surfaces (e.g., sandblasted brick, faulty wood
siding) . . .
THEN DO THESE THINGS AS FIRST PRIORITY:
- Maintain, clean, or repair roofs, flashing, gutters,
downspouts, windows, caulking, mortar joints, weep
holes in columns, etc.
- Keep attic, basement, and foundations dry and well
ventilated, with properly working floor and ground
drains as needed.
- Keep door and window frames tight-fitting and well
caulked.
- Keep shrubbery and vines away from the walls and
foundations. Do not overwater plants near the building
foundation.
CONSIDER THESE STEPS AS LAST RESORTS:
- Damp-proof courses and French drains
- Below-grade waterproofing agents
- Above-grade water repellent coatings.
(See Figures 4-11 and 4-12.)
4.4 CLEANING AND COATINGS.
4.4.1 Cleaning of Masonry. The usual reason for wanting to
clean masonry buildings is cosmetic. Clean buildings often look
nicer than dirty ones. Cleaning can also reveal historic
features, colors, or textures that have been hidden under years
of dirt. Cleaning masonry can make repairs easier and prevent
further damage.
However, improper cleaning can have exactly the opposite
effect, causing irreversible damage. Before beginning a masonry
cleaning project, get the advice of an experienced and unbiased
masonry specialist (not a cleaning contractor) . This is no time
for home remedies and self-help because mistakes can be costly
and permanent. The SHPO can recommend appropriate methods and
sources of expert advice.
4-18
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