Thursday, October 1, 2026
Q. Do you have any suggestions on how we can guarantee our house won’t be damaged while we have a renovation done? We’re doing a lot of work to add a back family room and a second floor. Our house is a cape that already has a second floor, but we want a full second floor. Everyone we spoke to called it a dormer, but we read your column in which you clarified that a dormer is pushed out through the current roof and a second floor is the whole thing, so we know. We want to stay on the first floor, and even though we’ll get a POD for the driveway, we’re concerned about staying on the first floor. The contractor showed us the plastic curtains he uses, but is there anything else? Our daughter has asthma, and we’re very concerned.
A. It’s tough to guarantee that dust won’t get in, since there are many ways dust travels and the average home, without any air filtration, usually get dusty, anyway. I have seen countless projects with zippered air curtain separations, sealed at the walls, floors and ceilings — even double curtains separated by 4 feet to create a vestibule, with a fan drawing air to the outside just before people open the first zipper. This is called a negative air method, and the fan should only be turned on when someone is about to enter the vestibule from the clean side, because if the fan is left on, it’s drawing air from the dusty side to the clean side.
Several clients purchased boxes of disposable booties to slip over shoes to keep from tracking in dust and dirt. If you have carpeting or just want to protect your finished floors, it’s best to have the walking paths covered in plywood and heavy plastic. Lift the plastic and fold inward to discard periodically, or vacuum with a brush attachment so as not to suck up the plastic. Also, if the path is highly trafficked, it will tear and may be slippery from the booties and dust, so monitor the surface and how affected it will be.
Sometimes just a smooth fiberboard, without splinters, is best. One client even used a spray bottle to spray the air and then the booties before discarding them in a plastic bag. Unfortunately, some people did not completely understand the air flow issues, and left their exterior windows open in the clean areas, adjacent to where the work was being done, allowing the dust to float in through the windows from outside.
Depending on how much you want to spend, there are elaborate portable units with high-efficiency particulate air, or HEPA, filters that will rid the air of a large amount of dust as well as less-visible matter such as pollen. You may want to consult your child’s doctor for advice about filtered respirators, or whether it’s a good idea for her to be there during the construction at all. Good luck!
© 2026 Monte Leeper. Readers are encouraged to send questions to yourhousedr@aol.com, with “Herald question” in the subject line, or to Herald Homes, 2 Endo Blvd., Garden City, NY 11530, Attn: Monte Leeper, architect.
