Calgary has seen some severe Attic rain episodes this Winter. IDEAL has been called to dozens of homes that are experiencing water damage in their Attics, ceiling Drywall and in extreme cases water “raining” into their living spaces. We’ve talked before about the causes: penetrations that allow moisture in the Attic, insufficient insulation causing heat loss & ventilation problems. What we’ve seen the most this winter is Bath fan & Dryer vent exhaust pipes that are not fully 100% exhausting hot moist air out of the roof vent.
Why is this happening? Well the standard exhaust vent for bath & clothes dryers is called a Gooseneck. It is curved in shape & contains either a flapper or grate (or both) to manage air flow & accessory ingress. But what this standard aluminum vent does not have is a dedicated internal pipe or collar for said bath fan or dryer vent hose/pipe to clamp onto. Instead the standard method in both new construction and renovations is to push the hose/pipe up to the interior opening in the Gooseneck vent and use a piece of chloroplast cardboard or sheet metal to hold in place. In effect the exhaust hose/pipe is adjacent to the opening of the Gooseneck vent, not actually connected.
The issue that many Calgarians have experienced is the hot, moist air that these exhaust pipes expell is spilling out of this connection and coating the underside of the plywood roof deck with moisture. During prolonged periods of cold weather this moisture causes frost to build that over days and weeks can become quite thick and prevalent. Once this cycle begins the connection of hose & roof vent begins to build with ice and subsequently opens up further allowing even more moisture to spill into the Attic. Lastly our classic Calgary chinooks blow in and quickly warms our climate causing the thick frost to melt quickly. The ensuing melting, or Attic rain, quickly overwhelms the attic insulation, ceiling vapor barrier, drywall and eventually comes raining down into your living spaces.
The solution that IDEAL advocates for is to replace the standard rooftop Gooseneck vent with one that has a dedicated interior collar. We’ve talked before about the Primex vent which is an excellent product for this application. When we replace & install the Primex we can ensure a proper connection between the hose and gooseneck and hence provide greater assurance that moisture will be vented outside as designed in reduce the chances that it will be trapped in your Attic space.
there is an air space between this exhaust pipe and the gooseneck roof vent which allows moist air to spill into the Attic
Note: you can see in this photo that there is a space between the metal flange used to hold the bath fan hose up against the bottom opening of the Gooseneck roof vent. If ice begins to form in this gap it will quickly grow over times of prolonged cold and push the gap even wider. Eventually a large portion of the bathroom or dryer warm/moist air that the homeowner is attempting to vent will instead be spilling into the attic and causing frost to grow on the plywood roof deck. When this frost melts Attic rain & damage ensues.
Soffits & Attic intake ventilation
/in Attics, Removal /by TrevorA common challenge with older homes is how efficiently fresh air can be introduced into the Attic space. The most common method is through the soffit area of the roof overhang. As we go back over the decades the materials and methodology used to frame and construct these areas can present challenges. A common issue is the original insulation is packed too tightly into the perimeter that it is blocking the intake ventilation. In the photo below you can see the original wood chip insulation is choking off the air flow in the truss cavity. Next to it you see a new styrofoam baffle or “air chute” installed to allow for intake air flow. A piece of white fiberglass batt insulation is installed underneath of the air chute to fill the space and prevent any insulation from the Attic from spilling into the soffit cavity.
The next photo shows the same installation from the Attic side. You can see lots of daylight coming in through the new air chutes. We want to maximize that air flow while containing the new loosefill insulation that will be installed last. This insulation needs to stay in the Attic and not fall into the soffit cavity where it can limit the intake air flow from outside.
The last photo displays how the original plywood soffit has been removed to expose the soffit cavity. This is critical in order to provide the maximum amount of air flow into the Attic. A common mistake is to install new perforated aluminum soffit over top of the existing wood soffit material. This greatly limits the amount of air that can travel into the soffit cavity and effectively chokes off the Attic. It is very important to remove the wooden soffit and any blockage at the heel above the external wall plate to ensure the maximum amount of fresh air can pass into the Attic
Existing wood chips blocking ventilation compared with new air chutes & batt insulation
new air chutes are installed with batt insulation to prevent the new insulation from falling behind
older home with wood soffit removed to expose the ventilation at the attic perimeter
Areas that are difficult to insulate
/in Spray Foam Insulation /by TrevorEvery house has them: areas that are difficult to insulate. Architectural design, framing details, framing actuality, workmanship can all lead to a convergence that creates difficult spaces for contractors to insulate. Another common occurrence is the intersection of different building materials. The spaces between can be tight, irregular and highly susceptibile to air leakage.
This is where Spray foam insulation really shines. Applications like the basement walk-out walls below are the perfect application for the benefits of spray foam. The chemically expanding foam bonds to both the concrete foundation and the wood framing. It provides a continuous seal along this transition, covering both vertical and horizontal surfaces. It would be impossible to both insulate and air seal this area with any other product.
If you have difficult areas to insulate consider spray foam and be sure to consult with an experienced and qualified contractor like IDEAL Insulation & Roofing to do the work.
2lb spray foam applied to basement walk-out walls
Energy Efficiency Alberta Rebate
/in Attics, Spray Foam Insulation, Walls /by TrevorThe Energy Efficiency Alberta Rebate was announced on April 18th and is designed to help Albertan’s improve their home’s energy efficiency through improvements in insulation. As a leading residential insulation contractor in Alberta IDEAL Insulation & Roofing is proud to participate in this program. As more details are released on the mechanics of this program we will communicate & facilitate with our customers.
To date we know that each home is eligible for up to $3500 in insulation upgrades. Applications such as Attic insulation upgrades/top-ups, Main floor exterior walls and Basement walls have been mentioned to qualify. The scope and ranges of these dollars figures have not yet been communicated. We will post more information as it becomes known.
The posted start date for this program is April 28th, 2017.
You can read more on the Energy Efficiency Alberta Rebate HERE.
CBC News also reported on this announcement HERE.
Global News reported on this announcement HERE.
Energy Efficiency Alberta
Managing moisture sources in Attics
/in Attics /by TrevorThis past winter was one of the worst for condensation issues in Calgary’s attics. The prolonged, deep cold spells exposed issues that caused extensive damage and frustration to homeowners and contractors alike. IDEAL was called to dozens of projects each month this winter where each homeowner was experiencing the same thing: moisture sources in the Attic. While the causes vary; from the building materials in place, proficiency of trades involved, design of the home & nature of how each homeowner used their home; one of the most common culprits was moisture sources in the attic. Predominantly these moisture sources included bath fan vent hoses/pipes and clothes dryers that exhausted through the roof.
We have discussed the importance of properly insulated hoses/pipes that pass through the unconditioned attic spaces before. In 2017 IDEAL moved our focus to the Gooseneck roof vent which exhausts these moisture sources out of the roof. We now place a high importance on installing a quality gooseneck vent with a dedicated collar that allows for a more secure connection to the vent hose. This increases the likelihood that moisture will vent out of the roof rather then expel into the Attic space and cause damage.
Whenever we do find examples of hoses like the one pictured below we absolutely must do something. This hose is the wrong product for this application and in our experience will lead to problems. It’s a simple fix while we are in the attic working and we can install the gooseneck at the same time to ensure proper venting.
non-insulated hose incorrectly venting a bathroom exhaust fan
primex gooseneck vent includes interior damper, exterior grate & size specific coupler to attach vent pipe/hose
Repairing Attic Insulation
/in Attics /by TrevorOne of the challenges of repairing Attic insulation is properly identifying the scope of work. Attics are out of sight and hence out of mind. Quite often our customers are not aware of the issues present as so few homeowners ever go up and explore their attic spaces. One of the common problems we come across is Trade damage. This occurs whenever anyone goes up and disturbs the attic insulation. It is very common if an Electrician or HVAC contractor has to do any work in the Attic. They must pull away the attic insulation to access the attic floor and it is very difficult to repair afterwards. Truly the only way to fix the footprints and disturbed insulation areas in an Attic is to blow in new material.
Far too often we find bare spots in Attics where other Trades, or residents, have worked in the past. Like these photos below you can see how much insulation is missing from around this potlight. There is significant heat loss in this area which can lead to frost in the attic, condensation issues, Attic rain and potentially Ice damning on the roof. If an electrician goes into an attic to install several pot lights this damage is multiplied leaving the Attic and Home in a vulnerable position.
If you are having work done in your home which involves a trades person working in your Attic it’s best to keep in mind that some extra insulation work after the fact can go a long way to ensuring your Attic is properly insulated and healthy.
Pot light with missing insulation
Pot light with missing insulation – Thermal image
Sources of Attic Rain
/in Attics, Removal, Roofing - Re-roof /by TrevorCalgary has seen some severe Attic rain episodes this Winter. IDEAL has been called to dozens of homes that are experiencing water damage in their Attics, ceiling Drywall and in extreme cases water “raining” into their living spaces. We’ve talked before about the causes: penetrations that allow moisture in the Attic, insufficient insulation causing heat loss & ventilation problems. What we’ve seen the most this winter is Bath fan & Dryer vent exhaust pipes that are not fully 100% exhausting hot moist air out of the roof vent.
Why is this happening? Well the standard exhaust vent for bath & clothes dryers is called a Gooseneck. It is curved in shape & contains either a flapper or grate (or both) to manage air flow & accessory ingress. But what this standard aluminum vent does not have is a dedicated internal pipe or collar for said bath fan or dryer vent hose/pipe to clamp onto. Instead the standard method in both new construction and renovations is to push the hose/pipe up to the interior opening in the Gooseneck vent and use a piece of chloroplast cardboard or sheet metal to hold in place. In effect the exhaust hose/pipe is adjacent to the opening of the Gooseneck vent, not actually connected.
The issue that many Calgarians have experienced is the hot, moist air that these exhaust pipes expell is spilling out of this connection and coating the underside of the plywood roof deck with moisture. During prolonged periods of cold weather this moisture causes frost to build that over days and weeks can become quite thick and prevalent. Once this cycle begins the connection of hose & roof vent begins to build with ice and subsequently opens up further allowing even more moisture to spill into the Attic. Lastly our classic Calgary chinooks blow in and quickly warms our climate causing the thick frost to melt quickly. The ensuing melting, or Attic rain, quickly overwhelms the attic insulation, ceiling vapor barrier, drywall and eventually comes raining down into your living spaces.
The solution that IDEAL advocates for is to replace the standard rooftop Gooseneck vent with one that has a dedicated interior collar. We’ve talked before about the Primex vent which is an excellent product for this application. When we replace & install the Primex we can ensure a proper connection between the hose and gooseneck and hence provide greater assurance that moisture will be vented outside as designed in reduce the chances that it will be trapped in your Attic space.
there is an air space between this exhaust pipe and the gooseneck roof vent which allows moist air to spill into the Attic
Note: you can see in this photo that there is a space between the metal flange used to hold the bath fan hose up against the bottom opening of the Gooseneck roof vent. If ice begins to form in this gap it will quickly grow over times of prolonged cold and push the gap even wider. Eventually a large portion of the bathroom or dryer warm/moist air that the homeowner is attempting to vent will instead be spilling into the attic and causing frost to grow on the plywood roof deck. When this frost melts Attic rain & damage ensues.
How to hire a Contractor
/in Attics, JM Spider, Removal, Roofing - New Construction, Roofing - Re-roof, Spray Foam Insulation, Walls /by TrevorIDEAL has been working with the Better Business Bureau for decades. They do a terrific job of identifying credible companies as well as supporting consumers with legitimate concerns. The BBB recently shared this FAQ sheet on how to hire a contractor. It clearly lays out some important factors to consider when choosing a reputable company to work on your home. Check out the link below and feel free to ask your IDEAL representative for any of our corresponding documentation.
Tip Sheet – Hiring a Contractor
Moisture Issues in Attics
/in Attics /by TrevorLast month Calgary experienced a significant cold spell where temperatures dipped below -10C for almost 3 weeks. Cold snaps like this expose moisture issues in attics as the prolonged cold leads to the development of frost. A healthy home in our climate will have limited heat and moisture loss into the attic space. Said heat and moisture should be vented outside with proper intake (via soffit or lower roof intake vents) and exhaust. When there are breakdowns in moisture control, insulation & ventilation the result can be the frost in the Attic. What many Calgarians found last month was that after 3 weeks of deep cold there was significant frost build-up in their Attic, usually on the underside of the roof. When the temperature rose this frost melted rapidly causing attic rain which overwhelmed the insulation, ceiling vapor barrier and drywall.
While inspecting dozens of Attics affected by Attic rain we identified a common culprit. Exhaust vent pipe connections to exterior roof vents. As you can see in the photos below the spillage from these connections can create a significant amount of moisture in the attic that over time can build several inches of frost. So how does this happen? Common causes include vent hoses that are too short, pulled tight, that put strain on the connection to the bath fan and/or roof vent. Or simply using roof exhaust vents that do not have an interior connection which the hose can clamp onto.
IDEAL is now recommending the use of Primex gooseneck vents for bath fans and dryer vents. These vents have a dedicated coupler which the vent hoses/pipes can be clamped onto created a secure connection. By ensuring this connection, coupled with a long enough vent hose with ample slack in the line, we can ensure that all air is properly vented outside of the home and hence reduce this moisture source from the attic space.
the connection between bath fan vent hose and exterior roof vent is comprimised leading to moisture exhausting into attic
dryer vent near exterior of attic is venting hot moist air along roof sheathing causing frost
primex gooseneck vent includes interior damper, exterior grate & size specific coupler to attach vent pipe/hose
Thermal fireproofing
/in Uncategorized /by TrevorIDEAL has been working to develop our thermal fireproofing services. Recently we completed a project where the metal exterior walls of a warehouse/workshop were fireproofed using Hibar cementious fibre.
hibar thermal fireproofing over metal walls
hibar thermal fireproofing over metal walls
hibar thermal fireproofing over metal walls
Energy Efficiency Alberta
/in Attics, Removal, Spray Foam Insulation, Walls /by TrevorThe Alberta Government has established a new Energy Efficiency Alberta Agency that will administer & incentivize Albertan’s to invest in upgrading their home’s energy efficiency.
Here’s a snippet of their press release. You can read the entire post here.
“”Energy Efficiency Alberta will promote and support energy efficiency and community energy systems (including micro-generation and small-scale generation) for homes, businesses and communities.
Initial programs include a Direct Install Residential Program, a Residential Consumer Products Program and a Business Non-Profit and Institutional Rebate Program.
Here at IDEAL Insulation & Roofing we are not certain what this new Energy Efficiency Alberta commission will mean to our business but we are certainly poised to service any requests for insulation upgrades. Give our office a call to discuss your thoughts or projects. Site inspections & quotes are always Free.