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This is Part-4 Of Our Multi-Part Article About How To Lower Cooling Bills (& heating bills)

By ADDING; Attic Insulation (if needed), An Attic Radiant-Heat Barrier, & Attic Ventilation (if needed). 

Al’s Plumbing, in Plano, Texas Provides Full-Service Plumbing; Maintenance, Repairs, and Replacements For Every Plumbing Component In Your Home. We sell and install gas and electric water heaters.  Al’s is near your home in; Murphy, TX; Rowlette, TX; and Wylie, Texas.  We service all homes in southern Collin County, TX, and northeastern Dallas County, TX with no additional travel charges.

Call Al’s Today To Discuss Any Concerns Or Problems You Have With Your Home’s Plumbing. 

We will arrange an appointment at your convenience.


Lower Cooling Bills (& Heating) With Attic Insulation

Part-4 Covers: Attic Ventilation, Attic Insulation, Radiant Heat Barrier, & Sealing Air Leaks In Ceilings. 

As Part Of Our Multi-Part Article: 75+ Ways To Lower Cooling Bills Without Upgrading Your HVAC System.

Click Here To Go To Part-1 Of This Article: Part-1 Central A/C Cleaning & Maintenance

photo of blown insulation in an attic

Photo Source: Shutterstock

TIP: Blown Fiberglass Insulation Has An Average R-Value Of 2.5 Per 1″ Of Insulation.


When built — older DFW homes didn’t have nearly enough attic insulation installed.  Adding attic insulation will pay for itself through lower cooling bills (& heating bills).

When more attic insulation is needed, it’s the 3rd best way to lower cooling bills After; 1st. Sealing Ductwork and 2nd. Sealing Air Leaks.  throughout the home.

jet flying over a home

Image Source: Shutterstock

A Worthwhile Side Benefit: Attic insulation makes a home quieter.  Indoor noise reduction is particularly noticeable in homes under air traffic and/or near busy roads.


Heat Travels Toward Cold — Year Round

Heat Travels Toward Cold Year-Round — until both spaces are the same temperature. 

  • Most people know that heat rises and escapes through ceilings during winter.
  • What’s less known is that, during summer heat travels downward (from a hot attic) into the cooler living spaces through ceilings (without enough attic insulation) & through ceiling air leaks.

sunny dat

Image Source: Shutterstock

  • During Summer: Without adequate attic insulation ceiling temps may reach up to 170F degrees.   The Attic’s Ventilation is limited as to how much it can lower attic temp during summer — because outdoor air (entering the attic) — is already at a high temperature.
  • Click below to see a thermal-image of a home’s attic — showing the temperature inside the attic at 170F degrees:

Thermal Image Shows 170 Degree Attic (scroll down to image)

If Link Doesn’t Work — Copy This Below Into Your Browser:

The Best Way to Cool Your Attic

 

snow on trees

Image Source: Shutterstock

  • During Winter: Without adequate attic insulation — ceiling temps are only slightly higher than the attic temp at night. Attic ventilation quickly removes most of the attic’s heat and replaces it with cold outdoor air. 
  • During the 2021 Winter Storm, on Feb. 16, 2021 — the low temperature at DFW International Airport was −2 °F.  This was the coldest temperature in North Texas in 72 years.


TIP: If You Have Air Conditioning — Scroll Down To The Next Double Lines

OR In Hot Climates — These Fans May Cool The House Enough During Spring & Fall, & Lower Cooling Bills.

TIP: No A/C? A Light Colored Roof Helps Keep The Attic Cooler,

  • Attic Temp 117F Degrees. For A Florida Home With Black Asphalt Shingles
  • Attic Temp 94F Degrees. For A Florida Home With Ivory Metal Shingles.
  • NOTE: If you’re in Climate Zone 5 or higher — reflective roofs can cause moisture problems.

Source: https://www.energyvanguard.com/blog/the-best-way-to-cool-your-attic/

Those Located In Cooler Climates and/or Without Air Conditioning

OR, In Hot Climates — Use These Fans During Spring & Fall To Lower Cooling Bills.

Consider A Whole-House Fan

Shown: Air King (brand) 9166F (model) Reversible Motor (blows in or out) Whole-House Window Fan.  $210 on 6/20/2023.

A Window-Fan (shown above) Has Expanding Panels To Fit The Window — The Panels Make It Quieter + Make It Move More Air.

Non-Permanent Installation (Install it in a window in a window in spring & remove it in fall).

TIP: Because It’s Removed In The Fall This Is The Most Energy-Efficient Solution During Winter.

Click On Image To; View Product, Read Details, or Purchase From Amazon.com

3-Speed,  2550 — 3550 Cubic Feet Of Air-Movement Per Minute.


TIP: A 20-Inch Box Fan (shown just below) Provides Notable Air-Movement Per Minute.

(Though some of that air is recirculated along the edges of the fan.)

Shown: Genesis (brand) G20BOX-WHT (model) 3-Speed 20″ Box Fan (4.5″ Thick) $35 on 6/20/2023.

No Cubic-Feet Air-Movement Information Provided.

Click On Image To; View Product, Read Details, or Purchase From Amazon.com


Traditional Style Whole-House Fan

Shown:

(24″ X 24″ Hole Required In A Ceiling)

Traditional Style Whole-House Fan (Installs Into A Ceiling.).  $350 on 6/19/2023

Click On Image To; View Product, Read Details, or Purchase From Amazon.com

2-Speed, 3200 or 4600 Cubic Feet Of Air Movement Per Minute (For Up To 1,800 Sq. Ft. Home)

state of texas flag

Image Source: Pixabay.com

Made In Texas.


A Quieter Whole-House Fan 

12” Ceiling Mount Whole-House Fan (12″ Hole Required In A Ceiling)

Shown:  AC Infinity CLOUDWAY (brand) EC Fan S12 (model). 

$400 For 10″ / 1200 Cubic-Feet Per Minute — on 6/20/2023.

$500 For 12″ / 1600 Cubic-Feet Per Minute — on 6/20/2023.

(Appx. 12″ X 16″ Hole Required In A Ceiling)

Features Temp & Humidity Monitoring.  Turns On Automatically When Your Preset Temp and/or Humidity Level Is Reached.

Includes A Wall-Mounted Programmable Controller.

Click On Image To; View Product, Read Details, or Purchase From Amazon.com

Up To 1,600 Cubic Feet Of Air Movement Per Minute, 10-Speeds, Remote Control Whole-House Fan

End Of Whole-House Ventilation Fans Section



Why Cooling & Heating Bills Are So High In Older DFW Homes

1970's built home

Image Source: Shutterstock

Shown: A Typical 1970s DFW Home

Because These Things Were Not Done When DFW Homes (pre 9/2016) Were Originally Built.

To Notably Lower Cooling Bills — Upgrade Your (pre 9/2016) DFW Home As Shown Just Below.

1. Seal Ductwork

ductwork for hvac system

Image Source: Shutterstock

2. Seal Air Leaks Throughout The Home.

blower door test

Image Source: Shutterstock

Shown: A Blower Door Test –Finds Air Leaks Throughout The House

3. Add Attic Insulation (Needs at least R-38/15″ of blown fiberglass insulation).

measuring insulation level in attic

Image Source: Shutterstock




TIP: If Your DFW Home Was Built After 9/1/2016 — Scroll Down To The Next Triple Lines.

Insulation Installed In Newly-Built DFW Homes — By Year-Built. 

TIP: Adequate Attic Insulation Will Notably Lower Cooling Bills

NOTE: These Numbers Are From Historical Records.  Actual Insulation Installed — May Have Varied By Home Builder.

And, previous owners may have added attic insulation.

TIP: Your Home’s Property Tax Records Typically Show The Year The Home Was Built.

              Attic Insulation                                                     Wall Insulation

             home attic with insulation                                                 fiberglass batt insulation for wall                    

Image Source: Shutterstock                                     Image Source: Shutterstock

  • New DFW homes built before 1965 — commonly had NO Attic or Exterior Walls Insulation.
  • New DFW homes, built 1965-1969:
  • In 1965. A Federal Law Required 2″ fiberglass batt/R-8 Wall Insulation Be Installed In New Homes.
  • The homes have 3.5″ thick exterior walls.

Some Builders May Have Installed:

  • R-11 (3″ Batt) Attic Insulation — but this was not required by Texas.
  • R-13 (3.5″ Batt) Attic Insulation — but this was not required by Texas.
  • R-11 (3″ Batt) Wall Insulation — but this was not required by Texas.
  • R-13 (3.5″ Batt) Wall Insulation — but this was not required by Texas.

  • New DFW homes, built during the 1970’s, & 1980’s:
  • Commonly had R-13 (3.5″ Batt) Attic Insulation — but this was not required by Texas.
  • Commonly had R-11 (3″ Batt) Exterior Walls Insulation — but this was not required by Texas.
  • New DFW homes, built during the; 1990’s, 2000’s, 2010’s — until 6/1/2016
  • Commonly had R-30 (12″ Blown) Attic Insulation — but this was not required by Texas.
  • Commonly had R-13  (3.5″ Batt) Exterior Walls Insulation — but this was not required by Texas.
  • On 9/1/2016 — Texas adopted the 2015 IECC.
  • New DFW homes, built after 9/1/2016 — until 9/1/2021 
  • R-38 (15″ Blown) Attic Insulation — this was required by the 2015 IECC.
  • R-13 (3.5″ Batt) Exterior Walls Insulation — this was required by the 2015 IECC.

newly built home

Image Source: Pixabay.com


  • On 9/1/2021 Texas adopted the 2021 IECC.   As of June 2023, Texas continues to use the 2021 IECC.
  • New DFW homes, built after 9/1/2021 
  • Attic (ceilings) Insulation: R-49 (20″ Blown).   
  • Wall Insulation: R-13 (inside exterior walls) -PLUS- R-5 FoamBoard Insulation covering the outside of exterior walls.

Source – Adoption Dates: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.austintexas.gov/sites/default/files/files/Development_Services/INSP_HistoricCodeAdoptionDates.pdf

Insulation Source: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.princeton.edu/~ota/disk3/1979/7914/791417.PDF


This YouTube Video Shows R-5 FoamBoard Insulation Covering Exterior Walls

(Green Insulation + Black Tape over seams)

TIP: For Newly-Built Homes — Current Texas Building Code Requires “Continuous” FoamBoard Insulation + Taped Seams.

“Continuous” means the entire outside surface of exterior walls is covered with Foam Board With Taped Seams (as shown below).

TIPS: 

  • A 2×4 wall, with R-13 insulation – has a Whole-Wall R-value = R-11. 
  • This is because the wood studs (spaced 16″ apart) have an R-Value = R-4.5.
  • With R-13 Insulation Inside Exterior Walls PLUS R-5 Foamboard On The Outside Of Exterior Walls – Whole-Wall R-Value = R-17.25
  • AND: The FoamBoard (+ taped at seams) minimizes air infiltration into the home.
  • AND: The FoamBoard (+ taped at seams) minimizes moisture infiltration into the home.

Source: https://echotape.com/construction-and-insulation/continuous-insulation-care/

Image Source: YouTube Embedded Video Link

Source: https://codes.iccsafe.org/content/IECC2009/chapter-4-residential-energy-efficiency#:

Source: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/http://insulationinstitute.org/wp-content/uploads/2015/12/TX-2009.pdf

End Of Attic & Wall Insulation Section 




Heat Is Also Lost Or Gained Through Ceiling Air Leaks

Seal The Leaks & You’ll Lower Cooling Bills (& heating bills).

sunny dat

Image Source: Shutter Stock

  • During Summer: Heat Is Gained through the ceilings – and- hot attic air enters the house at ceiling air leaks.
  • This causes cool outdoor air to Exit the house — through air leaks near the floors (such as at electrical outlets).

snow on trees

Image Source: Shutter Stock

  • During Winter: Heat is Lost through the ceilings and at ceiling air leaks.

ceiling electrical box

Image Source: Shutterstock

Shown: Ceiling Electrical Box With A Gap Between The Metal Box And The Ceiling.  This Gap Creates A 24/7/365 Air Leak.

  • This causes cool outdoor air to Enter the house — through air leaks near the floors (such as at electrical outlets).

electrical outlet with cover plate removed

Image Source: Shutterstock

Shown: Ceiling Electrical Box With A Gap Between The Metal Box And Drywall.

TIP: With Foam Gaskets –You Can Easily Seal Air Leaks At Electrical Outlets & Light Switches To Lower Cooling Bills.

Image Source: Amazon.com Link

Shown: Electrical Outlet Foam Gaskets

Click On Image To; View Product, Read Details, or Purchase From Amazon.com


Older DFW Homes Have Metal Ceiling Electrical Boxes — With Vent Holes

Image Source: Amazon.com

Shown: Metal Ceiling Electrical Box

Older homes’ ceiling metal electrical boxes have holes in them.  The holes were for heat (from incandescent light bulbs) to escape.

These Holes Create A 24/7/365 Air Leak.

 

WHY Older DFW Homes Have Holes In Their Ceiling Electrical Boxes

incandescent light bulb

Image Source: Shutterstock

Shown Just Above: Incandescent Light Bulb

TIP: 

  • 90% of the electricity used by incandescent light bulbs becomes Heat.
  • Only 10% of the electricity used becomes light.

led light bulb colors

Image Source: Shutterstock

Shown Just Above: LED Light Bulbs + Their Colors — Indicated By Kelvin (K) Number.

TIP: The Higher Kelvin Number — The Cooler & Bluer The Bulb’s Light.

TIP: 

  • 90% of the electricity used by LED light bulbs becomes Light.
  • Only 10% of the electricity LED Bulbs use becomes heat.

To Lower Cooling Bills & Heating Bills

TIP-A: Seal Air Leaks Around Ceiling Electrical Boxes With Caulk.

TIP-B: Seal The Holes In Older Metal Boxes With Caulk.

TIP-C: Seal Where Electrical Wiring Enters The Boxes With Caulk.

Here Is The Tool +  An Inexpensive Caulk To Seal Air Leaks At Ceiling Electrical Boxes

Image Source: Amazon.com Link

Shown: Caulking Gun

Click On Image To; View Product, Read Details, or Purchase From Amazon.com

Image Source: Amazon.com Link

Shown: Caulk For Gun

Click On Image To; View Product, Read Details, or Purchase From Amazon.com

TIP: Part-2 Of This Article — Discussed Sealing Air Leaks Throughout The House.


Today’s Electrical Boxes Are Plastic + Have The 2 Features Shown Below

Image Source: Amazon.com

Shown: Today’s Plastic Ceiling Electrical Box

Click On Image To; View Product, Read Details, or Purchase From Amazon.com

Today’s Electrical Boxes Have:

  • No Holes (or a single small hole – depends on the brand).
  • A Flange – To Seal The Gap Between The Box And The Ceiling Drywall.
  • TIP: If You Have “Popcorn” Ceilings (Shown Below) — For An Airtight Seal, add a thin bead of caulk along the inner edge of the flange.

popcorn texture ceiling

Image Source: Shutterstock

Shown: Ceiling With “Popcorn” Texture



TIP: To Skip This Section About Siding Replacement — Scroll Down To The Next Double Lines.

On A Side Note…

If You’re Replacing Exterior Siding On A DFW Home

You’ll Lower Cooling Bills (& Heating Bills) By Installing A House Wrap Product Under New Siding.

Many Older (mostly brick) DFW Homes Have Some Exterior Areas That Are Covered With Siding.

TIP: Check With Your City Before Starting Work. A Building Permit May Be Required.

TIP: If You’re Replacing Exterior Siding That Covers Living Spaces, Consider This:

TIP: Add A House Wrap (Tyvek is the most recognized brand) + Tape The Seams To Notably Reduce Air & Water Infiltration  

home with tyvek house wrap added

Image Source: Shutterstock

Shown: Home Covered With (white) HouseWrap Air & Water-Infiltration Retarder Before Siding Is Installed.


WHY You Can’t Install 1″ Foam Board Insulation On An Existing Home

new home with tyvek on exterior walls

Image Source: Shutterstock

Shown: New Home Being Built With Air & Water Infiltration Barrier

  • Unless the home was originally built with 1″ thick exterior sheathing — its windows are installed flush with the exterior walls.
  • New homes have windows designed to accommodate 1″ FoamBoard on exterior walls (their windows’ frames are 1″ thicker).

Click Below To See Windows Designed For 1″ FoamBoard Insulation:

New Home Windows Designed For 1″ FoamBoard Insulation

If Link Doesn’t Work — Copy This Into Your Browser:

https://www.google.com/search?q=home+under+construction+with+exterior+board+insulation&tbm=isch&source=univ&fir=ZtwpjD1maowZuM%252C2QklzhDG-4sWiM%252C_%253BQ-nJ2FIFUHKJRM%252CLPwHBnv9A91S2M%252C_%253BxaOBC8wkUazYIM%252Cgq-KkWhqUYcw0M%252C_%253BVuENuJdohNRJ5M%252CEX86vVAUBXJ_pM%252C_%253Bb_W_aW6SdwDIDM%252CvdQjLi3QiBI6OM%252C_%253BAt1YDRvO6QepGM%252C9nQ8EUY3yO1FvM%252C_%253BKguw-T0vZqLAfM%252COAnfWWSF1ntUrM%252C_%253BQIATKnsdektT_M%252C4WLx7VlVFW1dtM%252C_%253BKAXiJQNlWfiRvM%252CpOey4lj7p6roVM%252C_%253BNw8VmkzY5ICLzM%252CLPwHBnv9A91S2M%252C_&usg=AI4_-kSdekzrnrXAheZZ6UQmhu6-D-nTpQ&sa=X&ved=2ahUKEwjOs6ng48__AhWzlGoFHQ0pA4YQ7Al6BAhBEFs&biw=768&bih=375&dpr=2.5#imgrc=VuENuJdohNRJ5M



 Common Attic Insulation Problems That Can Happen Over The Years

attic floor with missing insulation

Image Source: Shutterstock

Shown: Missing Attic Insulation

Missing Attic Insulation: Never Installed OR Was Moved.

If only 5% of attic insulation is missing — this causes a nearly -55% drop in R-value for the entire attic.

Source:  https://advantagehomeperformance.com/insulation/common-attic-insulation-defects/

Click Below To See A Thermal-Image Of A Room’s Ceiling — Below Where Attic Insulation Is Missing

Thermal-Image Showing Missing Attic Insulation

Note: Yellow = Warm Surface.  Purple = Cold Surface

(If Link Doesn’t Work — Copy This Below Into Your Browser) 

https://www.google.com/search?biw=960&bih=469&tbm=isch&sa=1&ei=V4ezW9eFDYHcsAX-17so&q=thermal+image+of+missing+attic+insulation&oq=thermal+image+of+missing+attic+insulation&gs_l=img.3..35i39.4929.5824..6107…0.0..0.58.381.8……1….1..gws-wiz-img.2GN8AW4xYTg#imgrc=SJcY68IuFtmFiM


measuring insulation level in attic

Image Source: Shutterstock

Ways Attic Insulation R-Value May Have Become Reduced Over Time

If you have had workers inside your attic — Have An Insulation Inspection — to ensure it’s still correctly installed. 

  • Natural Settling: After a few years, blown insulation settles a few inches — which minimally reduces R-Value.
  • If blown attic insulation gets more than barely wet — the wet fibers join and create clumps.
  • Wet attic insulation must be replaced.
  • Disrupted Insulation — It’s common for workers to kick insulation out of their way while working in the attic.  Or it may be crushed.  More details below.

Click Here To See A Photo Of A Pathway Of Crushed Attic Insulation: Crushed Attic Insulation

If Link Doesn’t Work — Copy This Into Your Browser:

https://forum.nachi.org/t/deep-insulation-do-you-enter-the-attic-space/110524


Click Below For An ARTICLE Discussing Attic Insulation Problems

Article Discussing Attic Insulation Problems

This Article Discusses & Shows Photos Of:

1. Missing blown attic insulation – correct amount was never originally installed.

2. Blown attic insulation: rooms with no insulation originally installed.

3. Uninsulated Kneewalls.   A kneewall is a vertical wall between the house and the attic.   These are often left uninsulated.

4. Fiberglass batts falling into lowered areas of the ceilings below.

5. Open chases — a chase is the area covering fireplace venting.

6. Misaligned batt insulation.  Batt Insulation was never installed properly.

7. Attic platforms & walkways — minimal or no insulation there.

8. Disrupted insulation– insulation is no longer where it belongs

9. Un-insulated attic access door (if door is inside living space — not needed for access door in garage).

10. Insulation is blown away from soffit (air-intake) vents.  Likely caused by high winds.

If Link Doesn’t Work — Copy This Into Your Browser:

https://advantagehomeperformance.com/insulation/common-attic-insulation-defects/

Blown Insulation Settling Source: https://www.bobvila.com/articles/blown-in-insulation/

Wet Blown Insulation Damage Source: https://energyattic.com/does-wet-insulation-need-to-be-replaced/#:


With Either Of These Devices

You Can Determine If There Are Areas Of Missing Or Inadequate Attic Insulation

From Inside The Rooms Below.

Infrared Thermometer

Infrared Thermometer

This Inexpensive Device Tells You The Temperature Of What It’s Pointed At (note: no infrared image)

TIP: This Is All That’s Needed To Find Missing / Inadequate Attic Insulation (Take Readings At Assorted Nearby Locations).


Infrared Image Attachment For Cell Phones

Infrared-Image Attachment For Android Or Apple Phones

Click On Image To; View Product, Read Details, or Purchase From Amazon.com

This Product Provides Infrared-Images Of Ceiling Temperatures.  It’s Quicker To Use & Covers Larger Areas Of Ceilings.




Why Attics Get So Hot

sunny dat

Image Source: Shutterstock

Most Of The Attic Heating Occurs Due To The Sun Shining On The Roof. 

This Is Called “Radiant Heat“.  

Additionally, Hot Outdoor Air Enters Through Air-Intake Vents During Summer.

The sun’s heat radiates downward through the rooftop — then heat radiates downward until the heat hits solid materials within the attic.  Most of the radiant-heat gets absorbed by the wood framing and/or attic insulation.  Then, the lumber & insulation inside the attic disperse their heat — by conducting it downward into the house.

TIP: This Summer Heat Becomes Notably Worse With The Furnace And/Or Ductwork Located In The Attic.

 (This Is Common Practice In DFW.)

hvac ductwork inside attic

Image SourceL Shutterstock

Shown: HVAC Ductwork Inside A Home’s Attic



If Your Home Already Has A Foil (or Painted) Radiant-Heat Barrier — Scroll Down To The Next Double Lines

A Foil Radiant Heat Barrier

Minimizes Radiant-Heat Reaching The Attic Floor (the room’s ceilings)

Note: Al’s Does Not Install Radiant-Heat Barriers Or Attic Insulation.

Shown: Foil Radiant-Heat Barrier

Click On Image To; View Product, Read Details, or Purchase From Amazon.com

A Radiant Heat Barrier helps limit the sun’s radiant-heat from getting so deeply into the attic.  A Foil Radiant-Heat Barrier can drop attic temperature up to -20° F near the attic floor (which are the ceilings in the rooms below).

Radiant-Heat Transfering Into The Living Spaces Spaces Below — Is Most Effectively Minimized By

  • Proper Attic Ventilation
  • Increased Attic Insulation
  • A Foil Radiant Heat Barrierthat’s stapled to the trusses inside the attic.

Click On The Image Below To See A Photo Of A Foil Radiant Heat Barrier Being Stapled To The Trusses:

Foil Radiant Heat Barrier Stapled To Trusses (See Image With Attic Foil Verbiage)

If Link Doesn’t Work, Copy This Below Into Your Browser

https://www.google.com/search?q=foil+radiant+heat+barrier+stapled+to+trusses&tsm=3&tbm=isch&sa=X&ved=2ahUKEwjGp62u053_AhW0mWoFHXBJDKEQ0pQJegQIDBAB&biw=960&bih=468&dpr=2#imgrc=i8m-iTREDUINRM

End Of Foil Radiant Heat Barrier Section



Do You Need A Power Attic Ventilator?

Image Source: Amazon.com

Shown: Electric Attic Ventilation Fan

Click On The Image To; View Product, Read Details, or Purchase From Amazon.com

Click On The Image To See A Recommended Installation For This Product


There Are Various Opinions About Attic Ventilators.   

If You Open 5 Websites, You May See 5 Different Opinions.

Here’s One Opinion:

On a 90-degree day, a thermometer in your attic — will ideally read 110 degrees or less.  IF An Attic Isn’t Properly Ventilated, the temperature may exceed 125+ degrees.

Source: https://www.cjonline.com/story/lifestyle/home-garden/2015/04/17/home-living-attic-fans-can-help-you-beat-heat/16632091007/

Here’s A 2nd Opinion:

If your attic is Properly Insulated to at least an R-38 / 15″ blown insulation AND is Properly Ventilated — Leave it alone.

Source: https://ktar.com/story/5154760/heres-how-you-can-ensure-your-attic-has-proper-ventilation/

Here’s A 3rd Opinion:

A significant amount of the air being exhausted May Be Coming From Air-Conditioned Living Spaces — Through Air Leaks In The Ceilings.  Every opening in the ceiling is a potential source of air leakage (particularly in older homes).


Here’s Our Opinion

IF Attic Vents Are Visible From Outside The Home — The Attic Already Has Ventilation

When Built: The Home’s Attic’s Air-Intake & Air-Exhaust Venting Were Designed & Installed To Match Each Other’s Capacity.   

If you increase the amount of air being exhausted — the attic’s air-intake vents are likely not large enough to bring enough outdoor air into the attic.  If this is the case, additional air will come from air leaks in ceilings.

2 Common Types Of Air-Intake Vents In OLDER DFW Homes

If You See Anything That Looks Similar To The Photos Below — Your Attic Is Already Ventilated

attic venting      attic gable vent grill 

Image Source: Shutterstock                                  Image Source: Shutterstock

SHOWN: Gable Vent — Older DFW Homes.    Gable Vent — Newer DFW Homes.


This YouTube Video Shows Soffit (Air-Intake) Vents — Found In NEWER DFW Homes

Image Source: YouTube.com Embedded Video Link

SHOWN: Attic (air-intake) Soffit Vent


The Most Common 2 Types Of DFW Homes Attic Ventilation Air-Exhaust Vents

attic ridge vent attic turbine vent

Images Sources: Shutterstock

   Turbine Vent– OLDER DFW Homes             Ridge Vent — NEWER DFW Homes

TIP: If the shingles at the roof’s peak are slightly higher (as shown in the photo on the right above) — The Home Has A Ridge Vent.


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This was Part-4 / Of Our Multi-Part Article About How To Lower Cooling Costs (& heating costs) with; Attic Insulation, Radiant-Heat Barrier, & Attic Ventilation.

Click Here To Go To Part-1 Of This Article: Part-1 A/C Cleaning & Maintenance

Al’s Plumbing, in Plano, Texas Provides Full-Service Plumbing; Maintenance, Repairs, and Replacements For Every Plumbing Component In Your Home. We sell and install gas and electric water heaters.  Al’s is near your home in; Murphy, TX; Rowlette, TX; and Wylie, Texas.  We service all homes in southern Collin County, TX, and northeastern Dallas County, TX with no additional travel charges.

Call Al’s Today To Discuss Any Concerns Or Problems You Have With Your Home’s Plumbing. 

We will arrange an appointment at your convenience.