A DIY Guide on How to Seal Drafts in Your Cape May Home

Everyone loves a refreshing salt air breeze when we’re walking along Beach Avenue or sitting on the porch. But when that breeze finds its way into your living room on a chilly day?

That’s not coastal charm—that’s a hit to your wallet.

Our coastal homes along the South Jersey Shore are notorious for draft spots. Between the shifting sands, high humidity, and relentless salt air, your home’s seals take a beating.

At Comfort Now by Bob McAllister, we know that even the best heating system struggles if your home is leaking air.

Sealing your home is the most cost-effective DIY project you can tackle this weekend. Here is how to seal your Cape May home from top to bottom.

The 30-Second Draft Test

Before you grab your gear, run a quick hand test. On a windy day, move your hand slowly around window frames, door joints, and electrical outlets. If you feel a distinct chill or moving air, you’ve found a leak.

For a more professional approach, hold a lit incense stick near the frame; if the smoke blows sideways, you have work to do.

Your DIY Draft Sealing Toolkit

Here are the tools you’ll need to start:

• Siliconized Acrylic Caulk: For stationary gaps (window frames, baseboards).
• V-Seal or Foam Weatherstripping: For moving parts (doors and window sashes).
• Door Sweeps: To block the gap at the bottom of exterior doors.
• Outlet Gaskets: Small foam pads that sit behind your electrical faceplates.
• Your Secret Weapons: A caulk gun, rubbing alcohol, and a putty knife.

Step 1: Prepping the Surfaces

In Cape May, invisible salt film is the enemy of adhesive. If you don’t clean the surface properly, your weatherstripping will peel off by next month.

• Scrape: Use a putty knife to remove every bit of old, crusty caulk.
• The Alcohol Wipe: After cleaning with soap and water, wipe the area with rubbing alcohol. This removes oils and salt residue so your seals actually stick.
• Dry Is Key: Never apply sealant on a foggy or damp morning. Wait for the afternoon sun to bake the moisture out of the frames.

Sealing the Upstairs (Attic & Windows)

Heat rises. If the top of your house isn’t sealed, your expensive heated air is escaping into the attic like a chimney.

• The Windows: Coastal winds rattle older sashes. Use V-seal weatherstripping in the side tracks; it stays tight as the window slides up and down. For the bottom where the window hits the sill, use foam tape to squish the gap shut.
• The Attic Hatch: This is often the biggest leak in the house. Apply a thick layer of foam tape around the perimeter of the wood stop. You can even glue a piece of rigid foam board insulation to the back of the hatch to stop heat from radiating through the wood.

Sealing the Downstairs (Doors & Baseboards)

The “stack effect” pulls cold air in through the lower levels of your home to replace the air escaping through the top.

• The Front Door: If you can see daylight under your door, you’re essentially heating the sidewalk. Install a heavy-duty door sweep. Cape May’s salt air can corrode cheap metal, so look for high-quality aluminum or vinyl options.
• Baseboards: In older Victorian-style homes, gaps often form between the floor and the baseboard. A thin bead of clear caulk can stop floor drafts instantly.

The Hidden Leaks (Outlets & Pipes)

You’d be surprised how much cold air travels through your walls.

• Electrical Outlets: Unscrew the faceplates on exterior-facing walls and insert a pre-cut foam gasket. It takes 60 seconds and stops drafts coming through the wall cavity.
• Under the Sink: Check where plumbing pipes enter the wall. If there’s a gap, fill it with expanding spray foam or caulk (wear gloves).

When DIY Draft Sealing Isn’t Enough

Sealing drafts is a great first step, but it’s only half the battle. Once your home is sealed tight, your HVAC system needs to move air more efficiently—so don’t forget to check that air filter! If your energy bills are still sky-high, it might be time for a professional check. From high-efficiency Carrier heat pumps to salt-resistant SaltShield™ Coastal Coatings that protect your unit from the Atlantic air, we have the coastal expertise to keep you comfortable.

Is Your Home Still Feeling the Chill?

At Comfort Now by Bob McAllister, we believe in creating healthy homes for happy families in Cape May and all the surrounding areas. Call Bob and the team at 609-363-9034 or book your service online today!