The Tool Desk
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Deck joist connections and window washing require different solutions: a joist that has been toenailed to a house deserves a qualified structural inspection, while streaks usually come from leaving dirty water on the glass rather than from using the wrong brand of cleaner. Tim Carter’s March 16, 2020 Ask the Builder column addresses both questions. For the deck, he describes the connection as unacceptable and points to a possible ledger-and-hanger arrangement, but that example is not a permit-ready repair for every deck. For windows, he recommends plain water with a small amount of liquid dish soap, an applicator to loosen dirt, a squeegee to remove the solution, and a cloth for the edges.
What is wrong with a toenailed outer deck joist?
Toenailing means driving nails diagonally through the end or side of one framing member into another. It can be useful in limited framing situations, but it is not automatically an adequate connection for an exterior deck joist carrying floor loads and, in this case, a railing post. The reader in Carter’s column reported that a contractor’s crew had nailed the outer joist to the side of the house, with some nails close to the wood edge and visible splitting. Carter called that connection unacceptable. He also said the photograph raised concerns about the ledger attachment and the flashing intended to keep water out of the wall assembly.
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The central issue is the load path. Loads from the deck boards travel through joists, beams or ledgers, posts, footings and the house connection. A railing post adds concentrated lateral and overturning forces at the joist. Nails placed near an edge can split the member, reducing the wood available to resist withdrawal and shear. A connection that looks substantial from the outside may still lack the capacity, spacing, corrosion resistance or substrate engagement required by the adopted building code.
Do not treat a generic “joist hanger” or “structural screw” as a universal cure. The correct connector depends on the joist size and species, the ledger and rim-board construction, the fastener schedule, preservative treatment, moisture exposure, and the way the deck is attached to the house. A building official, engineer or qualified deck professional should assess a suspect structure before anyone removes nails, adds hardware or rebuilds the railing.
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How should a suspect deck connection be inspected?
Begin with documentation, not demolition. Photograph the connection from several angles, including the underside, the ledger, the flashing, the joist end and the railing-post attachment. Record whether the framing is solid-sawn lumber or engineered material, whether the wood is pressure-treated, and whether there is decay, crushing, splitting or rust. Keep the deck occupied as lightly as practical until a professional evaluates a connection that appears compromised.
- Trace the load path. Identify where the outer joist bears or hangs, how the ledger is attached to the house, and where railing-post forces enter the framing. A joist that merely touches a wall is not the same as one supported by an approved hanger or bearing detail.
- Look for splitting and crushed wood. Edge splits around nails, elongated holes, crushed fibers or a visibly rotating joist indicate that the connection may not be transferring forces as intended. Do not assume that adding another nail restores capacity.
- Check the ledger and flashing. Water must be directed away from the wall and the ledger must be attached through the required structural layers. Missing, discontinuous or improperly lapped flashing can cause concealed decay even when the deck surface looks sound.
- Identify the fasteners. Determine whether nails, bolts, lag screws or approved structural screws were used, and whether their size, spacing and embedment match the connector manufacturer’s instructions and locally adopted code.
- Get a code-specific opinion. Ask the building department or a qualified professional which edition of the residential code applies in the project’s jurisdiction and whether a permit or engineered repair is required.
These checks are triage, not a capacity calculation. A connection can pass a visual glance and still be deficient, especially where the ledger or wall framing is hidden.
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What repair detail did Tim Carter suggest?
Carter describes one possible alternative: extend the ledger and use a double joist hanger attached with structural screws. In concept, that creates a more deliberate connection between the joist and the ledger than a few toenails driven near an edge. It may also provide a better bearing and fastening arrangement for the outer joist.
That detail should be read as a columnist’s example, not as a project-ready design. The required hanger model, screw type, number and pattern of fasteners, ledger dimensions, blocking, flashing and railing-post reinforcement all depend on the specific deck. Substituting ordinary wood screws, deck screws or a different hanger can invalidate the manufacturer’s load tables. The repair may also require opening the wall or replacing damaged framing rather than simply covering the existing nails.
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The American Wood Council’s DCA 6 guide provides prescriptive residential deck-construction information based on the 2015 International Residential Code. It illustrates ledger attachments, joist-to-beam connection options, joist-hanger selection and corrosion-resistant hardware. Because it is based on a particular code edition, it must be checked against the code adopted locally and against any later amendments.
A separate deck connection and fastening guide from Simpson Strong-Tie discusses connection details and references 2018, 2021 and 2024 IRC/IBC provisions. It is manufacturer guidance: use only the connectors and fasteners covered by the relevant installation instructions, and confirm that the listed design applies to the lumber and exposure on the project. The guide’s current page says its 2025 edition replaces F-DECKCODE22 and expires June 30, 2027; verify that status and the applicable edition when the work is specified.
Which factors determine a safe deck-connection repair?
| Decision factor | Why it matters | What to verify |
|---|---|---|
| Load path and capacity | The joist and railing must transfer gravity and lateral forces without splitting, withdrawal or rotation. | Joist support, ledger attachment, beam or hanger arrangement, and railing-post load path. |
| Framing and substrate | A connector designed for one wall or rim-board assembly may not work in another. | Solid-sawn versus engineered lumber, wall framing, rim board and actual member dimensions. |
| Corrosion resistance | Moisture and preservative-treated lumber can attack incompatible metal. | Connector and fastener coating or material, treatment chemicals and exposure conditions. |
| Installation requirements | Capacity depends on the specified fastener type, quantity, spacing and holes. | Current manufacturer instructions, approved fastener list and required washers or nails. |
| Local code | Code editions and amendments differ by jurisdiction. | Building department requirements, permits, inspections and any engineering details. |
Never mix hardware from different systems merely because the pieces fit together. If the original framing is split or decayed, a professional may need to replace it, add properly designed blocking, or redesign the railing support. A cosmetic plate over damaged wood does not create a reliable load path.
Why do windows streak after washing?
Streaks usually remain when dirty or soapy water dries on the glass, when the applicator redistributes loosened soil, or when the edge water is allowed to run back across a cleaned pane. Carter’s method separates the jobs: an applicator loosens and carries away dirt, the squeegee removes the remaining water, and a cloth catches the water left at the perimeter. As he puts it, “The brass squeegee you see the pros use is not a magic tool that’s cleaning the glass.”
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The method does not depend on a special brand or an exact commercial formula. Carter recommends regular water with a small amount of liquid dish soap. The column does not specify a measured dilution, a particular soap or a controlled comparison of products, so treat that mixture as his practical recommendation rather than a guaranteed formula.
How do you wash windows without leaving streaks?
Gather a bucket, clean water, a window-washer or lambswool-style applicator, a properly sized squeegee and a lint-free cloth. Use a stable work position; for upper stories, follow the equipment manufacturer’s safety instructions or hire a professional instead of leaning out from a ladder.
- Remove loose grit. Brush or rinse dust and cobwebs from the frame and sill so they do not become muddy paste on the glass.
- Mix a light solution. Add a small amount of liquid dish soap to regular water. Too much soap leaves a film that the squeegee must remove repeatedly.
- Wet the applicator. Saturate the washer, then wring it until it is wet but not dripping heavily. Work the solution over the entire pane, including corners, to loosen soil.
- Choose a squeegee path. Start at the top and pull in straight, overlapping strokes, or use a consistent side-to-side pattern. Keep the rubber edge in contact with the glass and wipe the blade between passes.
- Control the edges. Use a cloth to wipe the top, side and bottom edges after the squeegee pass. Replace a saturated cloth rather than dragging dirty water back onto the pane.
- Inspect in changing light. View the glass from several angles. If a mark remains, re-wet that area and repeat the applicator-and-squeegee sequence instead of polishing a dry spot with a cloth.
Clean the squeegee rubber and applicator regularly. A nicked blade, trapped grit or a dirty washer can create repeating lines that look like chemical streaks. Work in manageable sections when sunlight or wind would dry the solution before it can be removed.
What should you do when streaks keep returning?
First determine whether the marks are on the inside, outside or between sealed panes. Clean one small test area with fresh solution and a clean blade. If the mark disappears, continue with clean tools and controlled sections. If it remains, the cause may be mineral deposits, paint or a damaged coating rather than ordinary washing residue; avoid abrasive pads or aggressive chemicals until the glass manufacturer or a qualified glazier identifies a safe treatment.
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Check technique before changing products. Excess soap, a dry or damaged squeegee edge, dirty rinse water, and wiping the perimeter before the pane is fully cleared can all reintroduce moisture. The column does not establish that one commercial cleaner or tool brand outperforms another, so changing brands is not a substitute for removing the water completely.
How are the deck and window questions related?
They are independent maintenance problems and should be handled separately. Deck framing is a structural and code-compliance matter involving load paths, corrosion and approved connections. Window washing is a surface-cleaning task involving water control and tool sequence. A neat cleaning result cannot make a questionable deck safe, and a sound deck connection does not prevent streaks on nearby glass.
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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteFor the deck, stop and obtain an inspection when you see edge splitting, movement, decay, questionable ledger attachment, missing flashing or a railing post fastened only to a lightly connected member. For windows, start with clean water, a small amount of dish soap, an applicator, a squeegee and a cloth; then adjust the technique before buying specialty chemicals.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Practical checklists
Deck connection checklist
- Photograph the joist, ledger, flashing and railing-post connection.
- Note splits, crushing, decay, rust and movement.
- Identify lumber type, treatment and fastener type.
- Compare the proposed connector and fasteners with current manufacturer instructions.
- Confirm the locally adopted code and permit requirements.
- Have a qualified professional specify the repair before loading or altering the deck.
Window-washing checklist
- Remove loose grit from frames and sills.
- Use regular water with a small amount of liquid dish soap.
- Apply with a washer or lambswool tool.
- Remove the solution with a clean, intact squeegee.
- Wipe edges with a cloth and keep tools free of grit.
- Re-wet persistent marks rather than dry-polishing them.
What is the bottom line for this Q&A?
A toenailed outer joist—especially one with nails near the edge, visible splitting, a railing post attached to it, or questionable ledger flashing—warrants a professional assessment, not a copied repair detail. Carter’s extended-ledger and double-hanger example explains the type of engineered load path that may be considered, while the American Wood Council and connector manufacturers provide code and installation context. For streak-free windows, use the simple sequence Carter describes: lightly soapy water to loosen dirt, an applicator to spread it, a squeegee to remove it, and a cloth to finish the edges.
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Frequently Asked Questions
Can I add structural screws beside the existing toenails and leave the deck as it is?
Not safely by assumption. Screw size, placement, embedment, edge distance and the condition of the split wood must match an approved connection design; a professional may find that the ledger, wall framing or flashing also needs work.
Does DCA 6 apply to every deck in the United States?
No. DCA 6 is based on the 2015 IRC and is a prescriptive guide, not a substitute for the code edition adopted by your jurisdiction. Local amendments, unusual spans, elevated decks and site-specific conditions can require an engineered design.
How much dish soap should I put in window-washing water?
The source says only a small amount and gives no measured dilution. Start with a light solution that wets the glass without producing a heavy film; if residue remains, reduce the soap and use a clean squeegee blade.
Why do streaks appear only around the window edges?
Water often collects in the frame and runs back after the center is squeegeed. Finish by wiping the perimeter with a clean cloth, and check that the sill or gasket is not feeding dirty water onto the pane.
