Lead paint question
I have a 10 month old. We live in a 104 year old house. We gutted, renovated, and removed all the lead paint inside the house, aside from a couple of studs in the basement. We put up new siding, and all new windows and trim on the first floor. The second floor we just replaced the old windows and left the original exterior casing. I'm not sure why, but I'm sure there had to be a reason. The paint tested positive for lead. Just the exterior casing around the windows. There is no risk of friction to these areas. The weather is getting nice and we don't have central air. I am concerned about rain runoff, and lead dust getting in the house when I have the windows open.
Is this a realistic fear? And what would be the best solution?
Edit: The house was in very bad shape when we bought it, but it had good bones. There was a lot of water damage, holes in the walls, and damage from termites. Almost every window was broken or damaged.
We redid the electric, insulated and sheet rocked, resided the house, and replaced broken windows. We refinished the cast iron tub and sinks, stairs and railings, floors, and doors. Restored the brick chimney and fireplace, kitchen, and bathroom. We tried to keep as much as we could, and what we had to remove we were thoughtful and careful to keep the integrity of the home we love.
I just want to keep my child safe.