Find and seal the drafts in one home on the 5200 Wilshire block

Older apartments and fourplexes on this block leak conditioned air at doors, windows and penetrations; sealing them is the cheapest first step toward the LBC Energy Petal for the building. Standard: Living Building Challenge 4.0 — Energy Petal (net-positive energy). Solar, heat pumps, storage, and EV readiness ARE Energy-petal work. SDG 7. Proof: before/after photo pairs of each sealed gap + GPS + materials note Method (Living Building Challenge 4.0 — Energy Petal (net-positive energy). Solar, heat pumps, storage, and EV readiness ARE Energy-petal work. SDG 7.): 1. Walk the home with the occupant and mark every draft (doors, window sashes, sills, pipe penetrations); photograph each one before. 2. Clean and prep each gap so material adheres. 3. Apply weatherstripping, caulk or backer rod sized to each gap. 4. Verify each seal with a hand or smoke-pencil check and photograph after from the same vantage. Done when: before/after photo pairs of each sealed gap + GPS + materials note

Where

5200 block of Wilshire Blvd (public right-of-way + typical residential conditions), Los Angeles, CA 90036

Pay

$80 proposed

This packet is not funded yet, so this figure is a proposed price and not money waiting in escrow. If a buyer funds it, approved proof settles that price onchain. If nobody funds it, approved proof earns provable credit toward the work instead of cash. You see which before you claim, never after.

Proof

before/after photo pairs of each sealed gap + GPS + materials note

This is exactly what gets it approved. Nothing settles without it.

Level

entry

Open until

2026-09-01

How this work is done

A documented method, so this packet comes out the same whoever does it. Typically 60–150 minutes. Method of record: Living Building Challenge 4.0 Energy Petal — envelope and load reduction verified by measurement before and after, not by installed-product count

Bring

• caulk gun + backer rod
• weatherstripping sized to the gap
• low-expansion foam
• incense stick or smoke pencil
• infrared thermometer if available
• ladder
• camera + phone with GPS

Steps

1. 1. Photograph each target opening BEFORE, with GPS and timestamp.
2. 2. Find the leaks: run a smoke pencil around each frame on a windy day or with the exhaust fan running; mark every deflection.
3. 3. Measure each gap; choose weatherstripping that compresses to the gap, not larger.
4. 4. Clean the surface — sealant on dust fails within a season.
5. 5. Seal fixed gaps with backer rod plus caulk; use low-expansion foam only where framing allows.
6. 6. Fit weatherstripping to operable edges; the door or window must still close and latch without force.
7. 7. Re-test every sealed opening with the smoke pencil; the deflection must be gone.
8. 8. Photograph AFTER from the same positions.

If it does not match the plan

• Any sign of mould, water staining, or rot at the opening -> stop and flag; sealing traps moisture and makes it worse.
• Building is pre-1978 and paint is disturbed -> stop; lead-safe practices required (RRP rule).
• A combustion appliance is present and unvented -> do not tighten further without a CO check; tightening can backdraft.
• Window or door will not latch after weatherstripping -> the strip is oversized; refit rather than forcing.
• Gap exceeds 1cm -> backer rod first; caulk alone will fail.

What counts as done

• Before and after photos of every opening from the same position, timestamped, GPS inside the radius
• Smoke-pencil re-test documented as showing no deflection at each sealed opening
• Every operable opening still closes and latches without force
• No sealing performed where moisture damage was present — flagged instead
• Materials and gap sizes recorded

Proof is measured against these, not judged by taste.