Know your limits and common myths

01 — Structural work: why a wall is never just a wall until you know

The danger with load-bearing walls is not removing them. It is removing one without realizing what it was holding up, because the consequences can take time to appear.

A load-bearing wall transfers the weight of the structure above it, floors, roof, sometimes both, down through the wall and into the foundation. When that wall comes out without an engineered replacement in place, the load it was carrying has to go somewhere else. Sometimes the result is immediate: a sagging ceiling, a partial collapse during the removal itself. Often it is slower. An undersized support beam can allow gradual deflection that takes weeks or months to show up as cracked drywall, doors that no longer close squarely, or a faint but growing slope in a floor. By the time these symptoms are obvious, the structural problem behind them has usually been developing for a while.

Determining whether a wall is load-bearing is genuinely difficult to do reliably from a casual inspection. A few rough indicators exist: walls running perpendicular to floor joists are more often load-bearing than parallel ones, and central walls in multi-story homes frequently carry weight from above. But these are only indicators, not proof, and past renovations can have already shifted how a home's loads are actually distributed in ways that are not visible from the surface. The only way to know with confidence is to have a licensed structural engineer evaluate the framing, load path, and existing support system directly.

• An engineer's site visit and calculation produce a specific design: the size and type of replacement beam (commonly a steel I-beam or engineered lumber like LVL), and the load-bearing points, such as concrete padstones or posts, needed to carry that beam's weight safely to the foundation.
• Permits and inspections exist for a reason here specifically. A building department inspection confirms the engineered design was actually followed during construction, not just specified on paper. Unpermitted structural work is a documented liability when selling a home, since it can surface during a buyer's inspection or appraisal and create complications or forced remediation.
• The cost comparison favors doing it right the first time by a wide margin. A professionally engineered wall removal, while not cheap, costs a fraction of what retroactive structural repairs cost after a failure, and it carries none of the safety risk of an improvised support during the work itself.

02 — Gas lines: the one home system where invisible failure is the norm, not the exception

A gas leak gives almost no warning on its own. Pressure testing by a licensed gas fitter exists specifically because a connection can look and feel tight while still leaking.

Natural gas and propane are odorless in their natural state; the distinctive smell utilities add (often described as rotten eggs) is a safety additive, not an inherent property of the gas. This matters because it means a homeowner has no reliable sensory way to confirm a connection is sealed. A fitting that feels snug to the hand can still leak slowly, and that leak can accumulate in an enclosed space to dangerous or explosive concentrations without anyone noticing until the additive's smell becomes apparent, which may be well after a meaningful volume has already escaped.

Licensed gas fitters address this with a specific, verifiable process: pressure testing. The system is sealed and pressurized, typically with air, to a level mandated by local code, often well above the gas system's normal operating pressure. The line then has to hold that test pressure for a specified duration without measurable drop. Any drop indicates a leak somewhere in the system, which gets located and corrected before the system is approved. This is not a step that can be approximated by feel or by a quick visual check; it requires the gauge, the procedure, and the training to interpret the result correctly.

Most U.S. jurisdictions require a permit for any gas line work and a subsequent inspection before the line is approved for service, which functions as an independent check on top of the contractor's own pressure test. Hiring uncertified individuals for gas work, beyond the direct safety risk, can also void a homeowner's insurance policy and create legal exposure, since the work falls outside what most policies and local codes recognize as a properly performed installation.

03 — Roofing: emergency tarping is reasonable, permanent repair is a different category

Falls account for roughly 35 to 40 percent of all construction industry fatalities, and roofing has the highest occupational injury rate of any non-manufacturing industry. The risk does not become lower because the roof in question is your own.

OSHA requires fall protection for any worker exposed to a fall of 6 feet or more in construction settings, a threshold most residential roofs exceed easily. Professional roofers work with harnesses, anchor points, and training specific to moving safely across pitched, often slippery surfaces, equipment a typical homeowner does not own and has not trained with. Beyond the physical risk, professional roofing work involves building code requirements for materials and installation methods that affect long-term performance, and the resulting work is typically warrantied in a way that DIY repairs are not.

Emergency tarping occupies a genuinely different category from permanent repair, and it is a reasonable, even expected, homeowner action after storm damage.

• Use a heavy-duty polyethylene tarp, sized to extend at least 4 feet beyond the damaged area on every side. A tarp that is too small leaves gaps where water still gets in, defeating the purpose.
• Anchor with wood boards (commonly 2x4 lumber), not just rope. Wrapping the tarp edge around a board and securing the board to the roof deck with roofing nails or screws distributes the holding force and resists wind far better than tying edges down alone.
• Never attempt tarping during active rain, high wind, or on a wet or icy surface. These are precisely the conditions where falls happen, and a tarp installed under pressure in unsafe conditions is also more likely to fail.
• Assess and photograph from a ladder or the ground first, not by climbing onto the roof directly, especially if the damage is extensive or the structure feels uncertain underfoot. If the roof is steep, severely damaged, multi-story, or you have any doubt about your footing, this step alone is reason enough to call a professional tarping or roofing service instead.

Many homeowners insurance policies actually expect this kind of mitigation: documented, prompt action to limit further damage after a covered event can support a claim, while neglecting the damage and letting it worsen can complicate one. Tarping is meant to last weeks, not months. Schedule a permanent repair as soon as conditions and contractor availability allow, since UV exposure and ongoing weather steadily degrade even a well-installed tarp.

04 — Myth: duct tape can permanently fix almost anything

The name is the source of the confusion, and it is also the clearest illustration of why the myth fails. The International Residential Code (Section M1601.4.1) and similar mechanical codes state plainly that joints in duct systems cannot be sealed with cloth-backed, rubber-adhesive duct tape unless it is used in combination with mastic and mechanical drawbands. Used alone, ordinary duct tape does not meet the standard, called UL 181, that legitimate duct sealing materials are tested against. That testing battery includes flame resistance, mold and humidity exposure, temperature cycling, and a dedicated leakage test. Regular duct tape's adhesive was not engineered to survive the thermal cycling an HVAC system puts it through; it loses grip and the seal fails, often invisibly, inside a wall or ceiling cavity where no one notices until energy bills rise or comfort suffers.

What actually seals ductwork correctly: UL 181A-P foil tape for rigid fiberglass duct board, UL 181B-FX tape for flexible duct, or mastic sealant, a thick, paintable compound that dries into a flexible, durable, genuinely airtight seal and is considered the most reliable option for gaps and joints. These materials cost more than a roll of standard duct tape and look less familiar at the hardware store, but they are the difference between a repair that lasts the life of the system and one that fails quietly within a season.

None of this means duct tape is without value. It earns its reputation honestly as a fast, genuinely useful temporary fix: sealing a cracked window pane until a proper repair can happen, bundling loose items for transport, patching a torn tent in the field. The distinction worth holding onto is between buying time and solving the problem. Duct tape is excellent at the first and unreliable at the second, for ductwork, plumbing, electrical work, or anything structural.

05 — Myth: open windows during a tornado to prevent your house from exploding

Engineering research from Texas Tech University's Institute for Disaster Research quantified exactly what the myth gets wrong. Even inside a tornado producing 260 mph winds, the internal pressure drop measures only about 10 percent below normal atmospheric pressure. A typical home, even with every window closed, has more than enough small gaps, vents, and structural openings to equalize a pressure difference that small within a few seconds, no open window required. And if a pressure differential somehow did become significant, the windows themselves, being the most fragile part of the structure, would simply break first and equalize the difference that way, well before any structural failure of the walls or roof could occur from pressure alone.

The myth's origin traces to a misreading of tornado damage itself. When extreme wind hits one wall of a house, that wall often collapses inward under the direct force. The sudden loss of that wall then puts unexpected outward pressure on the remaining three walls, and as the roof comes down, those walls can fall outward. To an observer afterward, a structure damaged this way looks like it exploded, walls splayed outward from a central point, which is exactly the image that gave the pressure-equalization theory its intuitive appeal decades ago. Damage surveys of these "exploded" houses consistently find that at least one wall was actually blown inward first, which is the real mechanical sequence: wind force, not pressure difference, caused the failure.