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Is my roof leaking? / Epic Roofing & Exteriors Ltd / Calgary /
Transcript of Is my roof leaking? / Epic Roofing & Exteriors Ltd / Calgary /
Poor duct insulation & sealing
Condensation forming in ducts
Moisture entering vents
Add vents to your roof system
Attics need airflow. Cold air should enter through intake venting in your soffit, and hot air should exit through vents along the ridge line. Make sure all vents are cleared so air can flow freely.
Be sure ducts are
Insulation creates a barrier to prevent the mixture of hot and cold air. At right is an example of a properly insulated duct.
Be sure that ducts are sealed properly at the ceiling level as well.
DO NOT MIX VENT TYPES
INSTALL A P-DUCT
Like the p-valve
beneath your sink
If you have room, install a p-duct on your ducts to prevent hot air from meeting cold air and forming condensation inside the ducts.
RUN YOUR EXHAUST FAN
Especially AFTER a cold snap
CHECK GOOSENECK VENTS
They may be compromised
Sometimes driving rain or snow may still enter through gooseneck vents. To prevent blow-in you may need to consider options like
the one pictured at right.
CLEAR BLOCKED VENTS
This is a problem in winter
If snow is blocking your roof vents, air will not be able to flow freely through your attic and condensation is likely to form. Take care when removing snow to prevent damaging your roof surface or shingles (especially if they are old).
Moisture on ceiling
Moisture on ceiling fan
Condensation / frost on attic ceiling
Moisture seeping into attic sidewall
RESULTS IN YOUR ATTIC
Uneven insulation can cause condensation
to form in your attic
Should be evenly distributed
As noted earlier, uneven distribution of insulation in your attic will make it easy for condensation to form in less insulated areas.
Also, note that if insulation is old or
compressed it loses its R-Value.
A case of uneven insulation
Vent nearly covered by snow
Serving Calgary and Southern Alberta
Information for this presentation was compiled primarily by Allan Lambie, Tyson Toth and Jim Bishop and drawing from the team at Epic Roofing & Exteriors Ltd. © 2014 All rights reserved, Epic Roofing & Exteriors Ltd. Photos used by permission.
1) Moisture is usually linked to condensation
2) Locating the problem may involve going into your attic or
on to your roof.
3) BE CAREFUL! Don't risk your health and safety
If you decide to go in your attic and you see white / metallic coloured pellets like those pictured at right, be warned that they may contain asbestos. The ones in the picture were tested, and reportedly were safe, but not all are.
CALL US for advice on how to proceed
We trust this presentation has helped you identify the possible cause of moisture in your home.
Let us know if we can help.
403-366-3770 ext 3 / 1-855-366-3742
Snow pack / access to sun
In cold weather condensation can still build up and freeze, even inside insulated ducts. When the weather starts to warm run your bathroom or stove ventilation fan for 30 minutes a day to aid evaporation.
CLEAR SNOW PACK
Sometimes snow can build up in an area that does not receive a lot of sunlight and insulate your roof in such a way that allows condensation to build, making it difficult for normal evaporation to occur.
Keep an eye on snow cover
Aluminum foil tape is better