What can I do about the exposed scalloped ends on my deck?

Since the posts are allready bolted down, you're pretty much locked out of doing a traditional picture frame border. The best way to handle this is to install a **matching fascia board** that sits flush with the top of your deck boards. You whould buy a thin trim piece of the same composite brand and screw it directly into the rim joist. It hides the scalloped ends and blocks the bees in one shot. You might have to rip the board down with a saw so it doesn't overlap your white trim too much, but it creates the cleanest look without needing to rebuild anything. If you want to keep the white trim exactly as it is, look for **plastic end caps** specifically made for your deck's profile. Most manufacturers sell bags of these plugs that snap into the hollow chambers. Put a tiny bit of clear silicone on the edges before you tap them in with a rubber mallet. This keeps them from vibrating out and ensures the bees can't squeeze past. The only hurdle is identifying your specific decking brand, beacuse those hole patterns are all diffrent. If you don't know the brand, take a small scrap piece or a very clear rubbing of the hole pattern to a local lumber yard. Another trick if you're on a budget is using a color-matched sealant or caulk. You'll want to stuff some foam backer rod into the holes first so you're only filling the first half-inch or so. Then you just smooth the sealant over the end with a putty knife. It’s a bit tedious, but it creates a solid barrier. Once the bees realize the openings are gone, they'll stop bothering you. Just make sure you clean the ends of the boards with some rubbing alcohol first so the material actualy bonds to the composite.

Whatever path you choose, try to do it before the weather gets too cold. Composite expands and contracts quite a bit, so you want to install any trim or plugs while the boards are at a mid-range temperature. If you go the fascia route, use the specific screws with the tiny heads designed for composite. They sink in and disappear so you don't have big silver screw heads poking out everywhere.

I’m dealing with the same bee situation right now. I never even thougt about using a backer rod before filling the holes, that sounds way easier than trying to fill the whole thing. Quick question though—if I go with the fascia board idea, do I need to leave a little gap for the boards to breathe? I heard composite can get wierd with moisture if it's sealed up too tight against the framing. Also, has anyone ever tried painting the ends of the boards? I saw a tip where someone just used a thick exterior paint that matched the deck color and it acutally didn't look half bad from a distance.

You definitly want that gap. Leave about 1/8-inch between the fascia and the deck surface so water can drain. If you butt it up tight, wet debris gets trapped and will rot your rim joist in no time. If you can’t find matching caps, try universal foam plugs and a dab of color-matched solid stain on the ends. It makes the hollows disappear from a distance. Also, check the underside; if the bees are getting into the ends, they might be finding gaps along the joists too. Packing a bit of stainless steel wool into the openings before you seal them is a permanent deterrent.

Make sure you pre-drill every hole if you end up installing that fascia board. Composite is notorious for 'mushrooming,' wich is when the plastic bulges out around the screw head and leaves a nasty bump. Without pre-drilling, those spots will ruin the clean look you’re going for and make the trim look uneven. Also, be mindful of the transition at the top of the stairs. If the new trim piece sits even slightly higher than the deck boards, it becomes a major trip hazard. I always take a sanding block to that top edge to give it a slight bevel. It makes the walk up much smoother and prevents you from catching your toe on the edge.

If you go the fascia route, watch the thickness. Standard fascia is often 1/2-inch or thicker, which can change the overhang of your top step and create an awkward lip. Check if your decking brand sells matching "riser" boards instead; they are usually only 1/4-inch thick and won't look as bulky against your white trim. Also, spray a little peppermint oil into those holes before you plug them. It discourages any remaining bees from trying to chew thier way back out through your sealant while you're working.