Screen Mesh Options
The screen mesh is the most important material decision for a Wilmington porch. Not because of cost -- it's a relatively small line item -- but because the wrong mesh choice makes the porch unusable for a large portion of the year.
| Mesh Type | Weave | Blocks No-See-Ums? | Airflow | Best For |
|---|---|---|---|---|
| Standard Fiberglass | 18x14 | No | Excellent | Inland, mosquito-only areas |
| No-See-Um Mesh | 20x20 | Yes | Good | All Wilmington/coastal NC builds |
| Solar Screen | 17x20 | Partial | Reduced | South and west-facing porches |
| Pet-Resistant | Vinyl coated | No | Good | Households with dogs/cats |
| Aluminum Screen | 18x14 or 18x16 | No | Excellent | High-traffic doors, durability priority |
Framing Materials
The framing is the structural backbone of the porch. In coastal NC, this choice has significant long-term implications because salt air and humidity accelerate wood rot and metal corrosion at rates that inland contractors don't deal with regularly.
Pressure-Treated Wood (PT)
The most common framing material for screened porches in the Wilmington area. PT lumber rated for ground contact (UC4B) holds up well in coastal humidity when properly detailed. The critical factors: proper drainage so water doesn't pool against posts, stainless steel or hot-dipped galvanized fasteners (standard galvanized corrodes in 5 to 10 years near salt air), and paint or stain as UV protection on exposed surfaces.
PT lumber is workable, widely available, and cost-effective. Most of our standard porch builds use PT framing. Life expectancy with good detailing: 20 to 30 years.
Aluminum
The preferred framing material for pool enclosures and properties very close to salt water. Aluminum doesn't rot, doesn't rust, and holds up in pool chemical environments that destroy wood over time. Pre-engineered aluminum screen room systems (pre-cut framing, interlocking connections) can be installed faster than custom wood framing and carry manufacturer warranties. The trade-off: higher upfront cost and a more industrial appearance that some homeowners don't prefer for a house porch.
For island properties on Wrightsville Beach and Carolina Beach, we often recommend aluminum for structures within 300 feet of the ocean. The maintenance savings over time offset the higher initial cost.
Cedar
A premium aesthetic option. Cedar is naturally rot-resistant and weathers well in humid climates. It's visually warmer than pressure-treated pine and can be left unstained to develop a natural gray patina. Cost premium over PT lumber: 40 to 80%. Most often specified for higher-end custom builds in Porters Neck, Landfall, or waterfront properties where aesthetics matter as much as function.
Fasteners and Hardware
This is where a lot of coastal builds fail -- not because of the big visible components, but because of the small hardware that holds everything together.
Standard galvanized fasteners (nails, screws, post bases, joist hangers) have a limited lifespan in salt air environments. Within 5 to 10 years they begin to corrode, staining the wood brown and eventually failing structurally. On all of our coastal builds, we use stainless steel fasteners or hot-dipped galvanized hardware (HDG, not electro-galvanized). The cost difference at the hardware level is small relative to total project cost. The structural consequences of skipping this detail are significant.
Hurricane connectors -- Simpson Strong-Tie or equivalent hurricane ties, post-to-beam connectors, and post-to-footing anchors -- must be rated for use in coastal environments. We use connectors rated for "coastal" or "severe" corrosion exposure, not standard interior hardware.
Roofing Options
The roof structure determines how the porch looks and performs in rain. Wilmington gets roughly 55 to 60 inches of rain per year, and summer afternoons often bring heavy rain within an hour of a clear sky. The roof needs to drain quickly and handle that load.
Attached vs. Independent Roof
Most screened porches attach to the house and tie into the existing roofline, sharing a roof pitch and drainage system. This is the cleanest approach and typically the most cost-effective. Independent freestanding porches with their own roof structure cost more but allow placement away from the house footprint.
Roof Panel Types
- Aluminum or fiberglass corrugated panels: Lowest cost, functional. Common on basic porches and pool enclosures. Translucent options let in diffused light.
- Solid insulated panels: Better thermal performance, quieter in rain, more finished appearance. Higher cost.
- Standard asphalt shingle (matching house): Most aesthetically integrated with the house. Requires full framing with proper pitch for drainage. Highest cost of the roofing options but looks like a permanent addition rather than an add-on.
- Standing seam metal: Long lifespan, excellent for coastal conditions, clean modern appearance. Premium cost, worth specifying for high-end builds.
What We Specify on a Standard Wilmington Build
- PT framing (UC4B ground contact rating where posts meet concrete)
- 20x20 no-see-um fiberglass mesh on all screen panels
- Stainless steel or hot-dipped galvanized fasteners throughout
- Hurricane-rated connectors at all post bases and beam connections
- Screened door with stainless steel hinges and spring-loaded closer
- Drip-edge flashing at all roof-to-wall connections
- Proper roof pitch (minimum 1:12) for NC rainfall drainage
These aren't extras -- they're our baseline for any build in coastal NC. On higher-end projects or island locations, we often substitute aluminum framing and upgrade to solar screen on south-facing elevations.