Baffles, Solar Power Fan , Bath Fan Exhausts For Fresh Air Flow To Reduce Extreme Temperatures In Attic Making Home More Comfortable In Summer
Ventilation
The answer depends on these factors.
Before reading more, consider scheduling a free insulation and ventilation evaluation with our estimators. We will measure temperatures and humidity in the attic, and evaluate the current ventilation as it relates to optimal conditions.
Attics ventilation draws in fresh outdoor air to balance temperatures and prevent mold growth.
Each category of ventilation is essential and if all 5 can be utilized that would be ideal. However due to structural considerations you may only get two or three types.
If you have the option cross gable ventilation has a great performance track record. Cross gable ventilation provides the most efficient air flow and can also be utilized with a power vent at one end of the gable. This is often see in grade level large scale parking garages to remove carbon dioxide from vehicle exhaust.
Soffit vents can be replaced with low profile vents near the bottom of the roof if there are no overhangs for air intake.
Cross Ventilation depends on natural air flow so if the homes elevation is not (south) facing for example it will not get adequate pressure from one side to move adequate air through the gable vents. This method of ventilation can be supplemented with electrical or solar powered fans. Most older homes relied on gable vents, methods shifted towards soffits and mushroom vents was taken up, however; the big mistake we see being made contributing to poor ventilation in this method is fiberglass batts or loose-fill fiberglass blocking air intake of the soffits.
2. Soffit Vents
See here in this photo is our field supervisor Charlie removing an existing baffle to expose black mold growth as a result of soffit air intake meeting warm air from the attic that un-intentionally escaped from the living space in winter, warming the fiberglass enough to create the condensation ( think cold glass of ice water on a picnic table in the hot summer sun.
Ventilation from the soffits must serve some better purpose than to be trapped behind insulation or to be directed into the wrong areas of the attic with no air flow balance.
2.a Soffit Ventilation / Baffles
In regard to soffit vents, Green Attic Insulation distinguishes itself from local competitors in one valuable way, we install soffits in every joist bay, not just ” were ventilation is present ” as seen by competitors, leaving the homeowner with less than desirable results. Lets be clear, the entire soffits is an air chute designed to pull air through each joist bay, not just where perforated soffits are present ( which is every 4-8 ft) without air flow across the entire soffit the sheathing will not be optimally cooled.
Our estimators check to ensure existing soffits are not
In Each Case: there is a standard menu item on our proposal to solve this problem. Fill out our contact form for a free ventilation evaluation today.
3. Power Vents – Fans Create Active Powered Ventilation / Solar or Electrical
Powered vents can be electrically powered or solar powered.
Powered vents can provide more air movement but must be installed with consideration of air flow balance.
Considerations for vents are calculations to determine the minimum required net free ventilating area (NFVA) using the 1:300 ratio or 1: 600 of upper attic area.
This is only possible when the soffits are open and baffles are properly installed to prevent insulation from clogging the soffits.
4. Continuous Ridge Vents
This allows outward air flow along the top of the roof. Look at your neighborhood, each house with a raised 1-2″ peak on the ridge has one already.
Continuous means end to end ventilation.
Since air movement is the key to good ventilation, it must have an air intake source in order to be effective.
Most new re-roofs include the upgrade to continuous ridge vents but must take into account air movement / balance.
5. Cap Vents / Mushroom Vents / Passive Roof Vents
Passive mushroom vents are less common in new construction as the continuous ridge vent is replacing them as it provides less penetrations and more air flow. Passive vents are also outtake vents and are designed to allow warm air to escape naturally in summer, and prevent a moist environment in winter.
Passive vents are not to be confused with active powered ventilation. In each case, a vented attic must perform in conjunction with a completely sealed attic floor to prevent air intake from the conditioned living space.
Each home is unique, and each homeowner has specific needs, that being said, there are some simple truths to follow when it comes to ventilation.
A Solar Fan is the best way to generate fresh air intake and exhaust. It is powered by the sun and runs whenever there is direct sunlight, keeping your upstairs cooler in the summer.
Ventilation depends on active or passive vents which draw fresh outside air into the vented attic space to prevent mold growth from humidity and condensation and prevent uneven temperatures relative to outside temperatures.
The attic should be the same or as close to outside temperature as possible.
Schedule a free estimate today and have a member of our team visit your attic and evaluate the humidity and temperature control of your vents.
Bath Fan Ventilation
Prevent Moisture Stains On Bathroom Ceiling By Insulated Duct Bathroom Fan Exhaust Sleeve
![bath fan exhaust through roof independent sleeve prevent attic mold ]](https://greenattic.com/wp-content/uploads/2022/01/bath-fan-exhast-through-roof-independent-sleeve-prevent-attic-mold-.jpg "Bath Fan Exhaust Through Roof Independent Sleeve Prevent Attic Mold")
Bath Fan Ventilation
Prevent Moisture Stains On Bathroom Ceiling By Insulated Duct Bathroom Fan Exhaust Sleeve
Bath Fan Ventilation
Prevent Moisture Stains On Bathroom Ceiling By Insulated Duct Bathroom Fan Exhaust Sleeve
Attic insulation can reduce heating bills by up to 50%. Get a free estimate from our team of insulation experts.
We are BPI Certified Contractor
BPI has the highest standards in energy efficiency and green building. That’s why all our technicians are BPI certified. BPI Requires professionals to stay up to date, so you know that everyone licensed through BPI is fully up to date on new research & technology.
We Focus On Air Quality, Comfort, and Energy Efficiency
WE ARE NOT HAPPY UNTIL YOU ARE HAPPY
Fully Licensed and Insured
| Model | Total Rebates | Program Name |
|---|---|---|
|
FLEXX24HP230V1AH |
$1,300 |
BayREN Home Plus Program - $1,000 Federal Tax Credit - Air Source Heat Pump - $300 |
|
FLEXX36HP230V1AH |
$1,000 |
BayREN Home Plus Program - $1,000 |
|
FLEXX36HP230V1AO |
$1,000 |
BayREN Home Plus Program - $1,000 |
|
FLEXX48HP230V1AH |
$1,000 |
BayREN Home Plus Program - $1,000 |
|
FLEXX24HP230V1BH |
$800 |
BayREN Home Plus Program - $800 |
|
FLEXX36AC230V1AO |
$800 |
BayREN Home Plus Program - $800 |
|
FLEXX36HP230V1BH |
$800 |
BayREN Home Plus Program - $800 |
|
FLEXX48HP230V1BH |
$800 |
BayREN Home Plus Program - $800 |
|
FLEXX60HP230V1BH |
$800 |
BayREN Home Plus Program - $800 |
|
FLEXX60AC230V1AO |
$800 |
BayREN Home Plus Program - $800 |
