All Articles
What to Expect From a Professional Home Energy Audit
Not all audits are the same. Here is what a complete diagnostic-grade audit actually covers — and what questions to ask to make sure you're getting it.
Read Article → Air SealingHow to Find Attic Top Plate Bypasses Without a Thermal Camera
Top plate bypasses are one of the most consistently overlooked air leakage sources in older homes — and you can find them with a flashlight.
Read Article → DiagnosticsWhat a Blower Door Test Actually Tells You About Your Home
A single number that makes invisible air leakage visible and measurable. Here's what CFM50 and ACH50 mean — and how to use the results.
Read Article → HVACWhy a High-SEER Air Conditioner Won't Fix a Leaky Home
SEER is a lab rating, not a field rating. Duct leakage, building envelope air leakage, and improper sizing all reduce real-world performance below the nameplate number.
Read Article → HVAC & DuctworkDuct Leakage: Why 30% of Your Heating May Be Going Nowhere
In many homes, a significant share of conditioned air never reaches the living space. Here is how to measure it and what to do about it.
Read Article → Home SafetyCombustion Safety Testing: The Check Most Contractors Skip
Before doing any air sealing on a home with gas appliances, a combustion safety assessment is essential — here is why and what it covers.
Read Article → Insulation & Air SealingSealing Basement Rim Joists: The High-Impact Fix Most Homeowners Skip
Rim joists are wide open to the outside in most older homes. Sealing them properly is one of the highest return-on-investment improvements available.
Read Article → InsulationR-Value Explained: Why the Number on the Bag Isn't the Whole Story
Labeled R-value and installed R-value are often very different. Here is what affects real-world insulation performance — and what actually matters.
Read Article → Moisture ControlCrawl Space Encapsulation: When It Makes Sense and When It Doesn't
Encapsulation is one of the most aggressively marketed home improvements. Here is an honest look at when it works, when to be cautious, and what to verify first.
Read Article → Building EnvelopeWhy Your Attic Comes First
The attic is where most homes lose the most energy — and it's the best place to start any home energy improvement project.
Read Article → HVACThe Most Common HVAC Upgrade Mistake
Replacing the equipment before fixing the building envelope is the most expensive mistake homeowners make in home energy improvements.
Read Article → Air SealingAir Sealing: The Hidden Fix That Changes Everything
Air sealing is the improvement that makes every other improvement work better — and the one that contractors are least likely to mention on their own.
Read Article → WindowsThe Honest Truth About Window Upgrades
New windows are one of the most popular home improvements — and one of the worst values for energy savings. Here is what the math actually shows.
Read Article → Utility BillsHow to Read Your Utility Bill Like a Building Analyst
Your utility bill contains more information than just the amount due. Here is how to read it to understand what your home is actually doing.
Read Article → SolarBefore You Go Solar: What Every Homeowner Should Check First
Solar panels generate electricity — they don't reduce how much energy your home wastes. Here is what to fix before solar so you don't overbuy on panels.
Read Article →How to Read This Blog if You're Starting From Scratch
These articles are written for homeowners, not contractors. There is no assumption that you know what a rim joist is or why anyone would want to depressurise a house on purpose. But they are also not marketing copy — nothing here is written to sell you a product, and several of the articles argue against spending money that most companies in this industry would be very happy to take.
If you are new to home energy work, the useful thing to understand before reading anything else is that a house behaves as a single connected system. The furnace, the attic insulation, the gaps around your recessed lights and the exhaust fan in the bathroom are not independent items on a checklist. Change one and you change how the others behave. That is the thread running through every article on this page, and it is why the advice sometimes contradicts what a salesperson told you.
Start with diagnosis, not solutions
The articles on home energy audits, blower door testing and duct leakage testing all cover the same underlying idea: measure before you spend. A blower door test puts a calibrated fan in your doorway and quantifies exactly how leaky the house is, and pairing it with a thermal camera shows you where. That is a few hundred dollars that routinely redirects several thousand toward work that will actually matter. Guessing at which improvements your house needs is how people end up with new windows in a home whose real problem was the attic.
Then work the building envelope
The pieces on attic insulation, top plate bypasses, rim joist sealing and crawl space encapsulation cover the highest-return work in most homes. None of it is visible when it is finished, which is exactly why it gets deferred in favour of things guests can see. The articles explain what each area does, how to tell whether yours needs attention, and roughly what the work involves.
Equipment and solar come last for a reason
The articles on SEER ratings, HVAC sizing, windows and solar readiness share a common warning: these are the most expensive purchases in home energy, they are the ones most heavily marketed, and they are the ones most likely to disappoint if the building envelope underneath them was never addressed. The windows article in particular pushes back on a standard industry pitch, because a draught felt near a window is very often coming from the wall cavity or the rim joist rather than the window itself.
And do not skip combustion safety
The combustion safety article is the one people are least likely to click and the one with the highest stakes. If your home has an atmospherically vented furnace or water heater, tightening the building shell can affect whether those appliances vent exhaust gases properly to the outside. Backdrafting is a carbon monoxide risk, and it is a genuine reason to have air sealing done by someone who tests the house afterward rather than by someone who simply seals it and leaves.