Use And Care Manual
WINDOWS AND DOORS
USE AND CARE GUIDE
1
www.crestlinewindows.com
© 2015 Crestline Mfg., Inc.
Thank You For Choosing Crestline
We design, engineer and manufacture all Crestline windows 
and doors to provide years of excellent performance. This Use and 
Care Guide explains the routine recommended maintenance 
the homeowner should perform, as well as certain service and 
repair functions that should be completed by professionals from 
your installing contractor or dealer.
Unit Installation
As stated in your Warranty, Crestline products must be installed 
in accordance with Crestline instructions, which are supplied 
with the products when they are delivered. We recommend that 
you verify with your contractor or installer that this requirement 
has been met, and that you obtain from the contractor, installer 
or Crestline dealer, a copy of the Crestline installation instructions 
to keep on file for future reference.
IMPORTANT:  Crestline recommends that Crestline 
products be installed by a professional.
Know Your Crestline Dealer
Be sure to obtain the name and telephone number of your 
Crestline dealer from your contractor or installer, and keep the 
information on file for future reference.
When You Believe You Have  
a Warranty-Covered Problem
•  First, get your contractor or installer to check it out.
•   If necessary, request an evaluation by service personnel 
from the Crestline dealer where your product was 
purchased.
•  If service personnel conclude that the problem may be 
covered by your Warranty, the dealer will contact his 
Crestline distributor to act on your problem.
Don’t Put Off Correcting Problems
Crestline wants you to be pleased and satisfied with all the 
Crestline products used in your home. We recommend that 
you consult your contractor or Crestline dealer as soon as you 
suspect any problems. They will probably be easily corrected, 
and it may be that immediate attention can prevent a much 
more serious future problem. You’ll find the personnel at your 
Crestline dealer helpful and always eager to meet your needs.
Contact Crestline at 1-800-826-5509 or visit us on the world 
wide web at www.crestlinewindows.com
Do not use reective or tint lm on glass. The 
application of lm to insulated glass in any 
Crestline window or door will void your 
Warranty.
Such film can cause increased thermal loading of the glass, 
which can result in higher edge stresses that will cause breakage 
that would not normally occur. In addition, application of 
reflective or tinted film creates conditions that adversely affect 
the glass seal and can ultimately bring about seal failure.
Condensation
Although window surfaces may be the first place you notice 
condensation forming, it’s really not the fault of the windows. 
Condensation is caused by excess humidity trapped inside a 
home; moisture that can cause problems if allowed to remain.
There are several steps you can take to reduce or eliminate 
excess humidity and condensation inside your home.
•  As a temporary solution, open a window in each room 
for just a few minutes. This is especially helpful after a 
shower, or after running the washing machine or other 
moisture creating appliances.
•  Keep attic louvers open. This will allow moisture that 
travels upward through the house and into the attic 
to be released to the outside. Some people close or 
block attic louvers during the winter in hopes of saving 
fuel. While energy savings are minimal, the moisture 
that is trapped in the attic can eventually do a great 
deal of damage to the roof, to attic insulation, and 
to the ceilings below. Besides louvers, other types of 
attic ventilation to consider are continuous eaves vents 
and ridge venting. If you are considering adding attic 
ventilation, it’s best to consult with a knowledgeable 
contractor on the best types for your home.
•  Check the crawl space or basement. The crawl space 
should have foundation vents so that moisture from the 
soil can travel to the outside instead of upward into 
your house. A vapor barrier (such as polyethylene film) 
over the ground is also helpful. If you have a basement, 
watch walls and floor for moisture seepage. Again, for 
advice on eliminating moisture in crawl spaces and 
basements, it’s best to consult an expert.
•   If you have exhaust fans in your kitchen, bathrooms and 
utility rooms, run them longer than usual in winter. If you 
don’t have them, consider having them installed.
•   Keep draperies and shades open so that air can 
circulate around the inside glass. Condensation is more 
apt to occur when drapes are closed and shades are 
pulled down.
•  Eliminate any other controllable sources of moisture in 
your house. Properly ventilate clothes dryers and all gas 
appliances. Control excessive use of room humidifiers.
•  Use dehumidifiers. Check with your local heating and 
cooling contractor on the size you need.
Use & Care
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USE AND CARE GUIDE










