Short answer: yes. Renovations are one of the best reasons to clean your ducts. Drywall sanding, sawdust and plaster dust are pulled into the return ducts whenever the furnace runs during the work, and that fine dust is blown back into every room afterwards. Book duct cleaning once the dusty work is finished and before your final carpet and upholstery cleaning.
Why renovation dust ends up in the ducts
Your furnace pulls air from the house through the return grilles, filters it and pushes it back out. During a renovation, the air is full of fine dust. A standard furnace filter catches some of it, but fine drywall dust passes through or clogs the filter fast. The rest settles inside the return ducts, the blower and the supply runs. When the job is done and the furnace keeps running, the dust keeps circulating.
How to protect your ducts during a renovation
- Turn the furnace off during the dustiest work, such as sanding drywall, if the weather allows.
- Seal return grilles in the work area with plastic and painter’s tape.
- Close or cover supply vents in the work area.
- Change the furnace filter before, during and after the project.
- Ask your contractor to use dust extraction on sanders and saws.
The right order after a renovation
- Finish the dusty work, including final sanding and trim.
- Book air duct cleaning to remove the construction dust from the system.
- Replace the furnace filter.
- Clean carpets, rugs and upholstery once the dust has settled.
- Seal any new tile grout so it stays clean from the start.
Which renovations leave the most dust
Not every project fills the ducts the same way. Drywall sanding is the worst, because the dust is fine enough to float through the whole house and settle in returns. Hardwood refinishing, tile cutting, plaster removal and demolition of old walls or ceilings come next. Painting alone leaves little dust, but sanding before painting does. Basement finishing often affects the whole system, because the furnace and main returns are right there. If the furnace ran during any of this work, assume dust went through it.
What to tell your contractor before work starts
- Seal supply registers and return grilles in the work area with plastic and tape.
- Keep the furnace off during sanding and cutting when the season allows it.
- If the furnace must run, fit a fresh filter at the start and check it every few days.
- Use a plastic barrier and zipper door between the work area and the rest of the house.
- Clean up with a vacuum that has a fine-dust filter, not a broom.
After the renovation: a clean-up checklist
Once the dusty work is finished, replace the furnace filter, then book duct cleaning so the supply and return ducts, the blower and the registers are cleaned. After that, clean carpets, area rugs and upholstery, because drywall dust settles deep in fibres and comes back up when people walk on it. Wash window sills and baseboards last. Doing it in this order means each step does not undo the one before. If the renovation included a new kitchen or bathroom, ask about tile and grout cleaning and new caulking at the same time.
Plan your post-renovation cleaning
UltiClean cleans ducts, carpets, upholstery and tile in one visit or in stages that fit your schedule, across Toronto, Vaughan, Richmond Hill, Aurora and Newmarket. Call (647) 676-0576 for a written quote. See air duct cleaning and carpet cleaning.
Duct Cleaning After Renovation FAQs
How soon after the renovation should I clean the ducts?
As soon as the sanding and cutting are finished. Waiting lets the dust circulate through the house for longer.
Does a small renovation count?
Any job with drywall sanding counts, even a single room. Kitchen and basement renovations usually create the most dust.
Will my contractor clean the ducts?
Usually not. General contractors clean up the work area, but duct cleaning takes specialized equipment.
Can drywall dust damage my furnace?
Heavy dust can clog the filter, coat the blower and make the system work harder. Change the filter often during the work and have the blower area cleaned afterwards.
Should I clean carpets before or after duct cleaning?
After. Duct cleaning can release some dust into the rooms, so do the floors last.
Is new-build duct cleaning the same?
Yes. New homes often have construction debris in the ducts before move-in. Read is duct cleaning worth it.
Finished a renovation in Toronto, Vaughan, Richmond Hill, Aurora or Newmarket? Call (647) 676-0576 for a written quote.
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Carpets, air ducts and tile and grout across Richmond Hill, Aurora, Newmarket, Vaughan and Toronto.
Written by
Carpet, air duct and tile cleaning specialist at UltiClean
Seyedamir (Amir) Vafamand has 12 years of hands-on experience cleaning carpets, upholstery, air ducts, dryer vents and tile and grout in homes across Toronto, Vaughan, Richmond Hill, Aurora and Newmarket. This guide is based on that work.
- 12 years of experience
- 1,100+ jobs completed on Jiffy
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UltiClean Air Duct & Carpet Cleaning Services
54 Limeridge St
Aurora, ON L4G 7X9
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