Installation Instructions
Allura Fiber Cement Siding Installaon Manual
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NOTE: We do not recommend power washing Allura Fiber Cement Siding as it can
cause moisture intrusion, damage, and/or discoloration.
Protecting Allura Fiber Cement Siding
Moisture Management and Gutters
Water management is key to protecting every part of your home, including your
siding. Each area of the country is affected by moisture, whether it’s an occasional
thunderstorm or high levels of rainfall. The resulting water has potential to cause
damage if not diverted. We recommend protecting your home from rainfall with gutters
and downspouts. And you should always be sure that your drainage system is free of
debris and working properly.
Shrubbery
Proper moisture management also involves managing your landscape. Plants hold
moisture, so any trees or shrubs that are close to your home should be trimmed
periodically. Plants should not come into contact with your siding. Also, sprinkler
systems should be adjusted to not saturate areas near your home.
Clearances
Maintain required clearances and drainage slopes to ensure that moisture is diverted
away from your siding at roof lines and ground level. Proper clearances include 1 inch
from concrete, roof lines, patios, etc., and 6 inches from the finished grade. Landscaping
should not reach the siding.
Recaulking
It is normal for building products located on the exterior of a home to expand and
contract with temperature changes. To ensure a successful siding installation, you must
allow for this movement during installation. While Allura Fiber Cement Siding does not
experience the same rate of expansion and contraction as many other building products
(such as wood), over time you may notice movement of the siding, specifically at the
butt end/ joints. This issue is mainly an aesthetic issue and should not create a condition
that would cause long-term product failure. If you are dissatisfied with the appearance
of the butt end/joint locations and wish to address them, Allura recommends that you
apply H-covers at the joint locations.
NOTE: Refer to your sealant manufacturer’s specifications to determine if they allow
the caulking of Allura Fiber Cement Siding butt joints/ edges, what their minimum and
maximum gap requirements are, and/or how this practice may affect the warranty for
the caulking.
To e n s u re t h a t c a u l k s a n d s e a l a nt s s t a y i n p l a c e , w e r e c o m me n d u s i n g m a t e r i a l s t h at
remain flexible. The labels of these materials will be clearly marked with a phrase similar
to “permanently flexible.” For best results, use a high quality, exterior-grade caulk or
sealant that meets ASTM C834 (latex caulk) or ASTM C920 (urethane caulk). The caulk
or sealant should be color matched or paintable. It should be compatible with both