Is my roof leaking Epic Roofing & Exteriors Ltd Calgary by Epic Roofing on Prezi

Condensation forming in ducts

Moisture entering vents

Blocked vents

ATTIC VENTILATION

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.

INSULATE DUCTS

Be sure ducts are

insulated properly

Insulation creates a barrier to prevent the mixture of hot and cold air. At right is an example of a properly insulated duct.

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

COMMON PROBLEMS

Condensation / frost on attic ceiling

Moisture seeping into attic sidewall

RESULTS IN YOUR ATTIC

UNEVEN INSULATION

Uneven insulation can cause condensation

to form in your attic

CHECK INSULATION

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

Gooseneck

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! Dont risk your health and safety

403-366-3770 www.epicroofing.ca

403-366-3770

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.

www.epicroofing.ca

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.

Insulation

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

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