Insulation and Decontamination in Lévis

Does your house smell musty? Do you have black stains on your basement walls? Is your attic poorly insulated and your heating bill skyrocketing every winter? Or worse, have you discovered asbestos or just experienced water damage or a fire?

Whether you live in Saint-Romuald, Charny, Saint-Nicolas, or Old Lévis, we remove hazardous contaminants, treat mold, and properly insulate your home so you can breathe clean air and feel comfortable in your own home.

Tell us about your project — free estimate with full on-site inspection.

Why Insulation and Decontamination Are Crucial in Lévis

In Lévis, our homes have to withstand winters of -25°C and humid summers. A poorly insulated home is money down the drain. And a home contaminated with mold, asbestos, or fungi is a danger to your health and that of your family.

We see it too often: attics with just 4-6 inches of mineral wool from the 1970s, damp basements filled with mold, old houses with asbestos in the pipes or ceilings, or poorly cleaned water damage that causes respiratory problems.

In older areas such as Vieux-Lévis, Lauzon, or Saint-Étienne, many houses built before 1990 contain asbestos somewhere. Worse still, in areas near the river such as Saint-Romuald or Saint Nicholas, High humidity promotes mold growth in poorly ventilated basements and attics.

These problems are dealt with safely, according to standards, and with the right protective equipment. No shortcuts, no risks for your family.

Our Insulation and Decontamination Services

Mold removal and treatment

If you have visible mold (black, green, or white spots) on the walls, ceilings, or in the basement, you need to remove it properly.

First, identify the source of moisture (water infiltration, condensation, poor ventilation), fix it, and then remove all contaminated materials.

We treat surfaces with antimicrobial products, seal porous areas, and make sure everything is dry before refinishing.

If the contamination is extensive (more than 10 square feet), negative pressure containment areas are installed to prevent spores from spreading to the rest of the house.

Decontamination after a disaster (fire or water)

After a fire or major water damage, it's not just a matter of drying and repainting. You have to remove all materials contaminated by soot, smoke, or standing water.

We remove the drywall, insulation, and damaged flooring. We thoroughly clean and disinfect, and make sure there are no odors or contaminants left behind before rebuilding everything.

We often work with insurance companies to document damage and expedite claims.

Asbestos removal

Asbestos is a hazardous material that was used in many homes built before 1990: pipes, furnace insulation, popcorn ceilings, vinyl flooring, and gypsum joints.

If asbestos is found in your home, it will be safely removed in accordance with CNESST standards: sealed containment area, full protective equipment, disposal at approved sites.

You should never rush into this. It's too dangerous for your health.

Attic insulation (loft)

A poorly insulated attic is the main source of heat loss in a house. In Lévis, a minimum of R-50 insulation is recommended in attics to comply with current standards.

Blown wool (cellulose or fiberglass) is installed over the entire surface of the attic. Adequate ventilation is ensured (clear soffits, functional roof vents) to prevent condensation.

If your attic already has insulation but not enough, we can add more on top to reach R-50.

Basement insulation (walls and ceiling)

A cold, damp basement makes the whole house uncomfortable. Foundation walls are insulated with rigid insulation (extruded polystyrene or sprayed polyurethane) to achieve a minimum of R-20.

You can also insulate the basement ceiling if you want to keep the heat upstairs, or insulate the walls if you want to finish the basement.

You always have to manage moisture at the same time: vapor barrier, dehumidifier, adequate drainage around the foundation.

Insulation of exterior walls

For older homes in Lévis with little or no insulation in the walls, foam or cellulose insulation can be injected from the outside without demolishing the interior.

It improves comfort and reduces heating costs by 20-30%.

Cleaning and disinfection of ventilation systems

Ventilation ducts (heating, air conditioning) accumulate dust, mold spores, and allergens. If your system hasn't been cleaned in 10-15 years, now is the time.

We clean the ducts with rotating brushes and HEPA vacuums, then disinfect them to eliminate bacteria and mold.

Problems Encountered in Lévis

Mold in damp basements

This is the number one problem. Basements in Lévis, especially those near the river, are often damp due to groundwater, foundation cracks, or lack of ventilation.

Mold grows on concrete walls, wooden joists, and insulation. It smells musty and can cause respiratory problems.

This can be resolved by identifying the source of moisture, removing contaminated materials, and installing adequate ventilation or a dehumidifier.

Poorly insulated attics with thermal bridges

Many homes in Saint-Romuald, Charny, and Saint-Nicolas have only 6-8 inches of insulation in the attic. The result: heat loss, high bills, and ice dams forming on the roof in winter.

We add blown insulation to achieve R-50, and we make sure that the ventilation is adequate to prevent condensation.

Asbestos in old houses

Houses built before 1990 in Lévis often have asbestos in heating pipes, ceilings, or under old linoleum flooring. If you are renovating and discover asbestos, it must be removed safely.

You see this a lot in Old Lévis, Lauzon, and the old bungalows in Saint-Étienne.

Mushrooms and rot in poorly ventilated areas

Excessive moisture in crawl spaces, attics, or behind exterior walls can cause wood rot and mold growth.

We remove the rotten wood, treat it with antifungal agents, and improve ventilation to prevent it from coming back.

Persistent odors after water damage

If a basement has been flooded and then simply dried out without removing everything, musty odors remain. And often, mold continues to grow behind the walls.

We dismantle everything, remove contaminated materials, disinfect, and then rebuild with moisture-resistant materials.

Stale air and respiratory problems

If your family members have allergies, asthma, or respiratory problems that worsen at home, it is often due to contaminants in the air: mold, dust, spores.

We identify sources of contamination, eliminate them, and improve air quality with ventilation cleaning and better filtration.

Why Choose SRQ for Insulation and Decontamination in Lévis?

We are based here in Lévis (2552 Chemin du Fleuve), and we work on all kinds of houses: old stone houses in Old Lévis, 1970s bungalows in Saint-Étienne, and newer houses in Pintendre.

We have the necessary equipment: respirator masks, protective suits, containment areas, HEPA vacuums, industrial dehumidifiers.

We comply with all standards: CNESST for asbestos, public health standards for mold, and the Building Code for insulation.

Each project comes with our 5-year warranty on labor. If a problem recurs because of our work, we will come back and fix it at no charge.

We work cleanly: we contain the work areas, protect the rest of the house, and safely remove contaminated debris.

Over 500 satisfied customers. Rating of 4.9/5. RBQ license 5811-7821-01.

How Much Does Insulation and Decontamination Cost in Lévis?

It depends on the type of work, the extent of the contamination, and the surface area. Here are some realistic estimates based on our experience:

Mold treatment

• Small area (less than 10 sq ft): treatment and disinfection : between 500 $ and 1,200 $
• Medium area (50-100 sq. ft.): material removal, treatment, reconstruction between 3,500 $ and 7,000$
• Major area (200+ sq ft) with containment : between 8,000 $ and 15,000 $

Decontamination after a disaster

• Basement water damage (500 sq. ft.): demolition, cleaning, disinfection : between 6,000 $ and 12,000 $
• After fire (1,000 sq. ft.): soot cleaning, odor removal, partial reconstruction between 15,000 $ and 30,000 $

Asbestos removal

• Heating pipes (20-30 linear feet) : between 2,000 $ and 4,000 $
• Popcorn ceiling (500 sq ft) : between 3,500 $ and 6,500 $
• Furnace and duct insulation : between 1,500 $ and 3,500 $

Insulation

• Attic (1,000 sq. ft.): added blown insulation up to R-50 : between 1,800 $ and 3,200 $
• Basement (800 sq. ft. of walls): R-20 rigid insulation : between 4,500 $ and 8,000 $
• Insulation injection for exterior walls (entire house) : between 6,000 $ and 12,000 $

Ventilation cleaning

• Complete house (10-15 ducts) : between 400 $ and 800 $

These prices include: assessment, protective equipment, containment if necessary, removal of contaminated materials, treatment, cleaning, compliant disposal, reconstruction if necessary.

No hidden fees. Everything is detailed in the quote.

The Process — Secure and Compliant

Step 1: Assessment and inspection

Call 418-476-1747 or fill out the form. We will come to your home to inspect the problem, identify the contaminants, and assess the scope of the work.

If necessary, laboratory tests (mold, asbestos) can be performed to confirm.

Step 2: Action plan

We provide you with a detailed plan outlining the necessary steps, deadlines, and costs. We explain everything clearly so that you understand what we are going to do.

Step 3: Containment and protection

Before starting, containment areas are set up with airtight plastic sheeting, negative pressure systems are installed if necessary, and adjacent areas are protected.

Step 4: Removal and decontamination

All contaminated materials (drywall, insulation, rotten wood) are removed, the area is thoroughly cleaned, treated with disinfectants, and debris is disposed of at approved sites.

Step 5: Verification and reconstruction

We check that everything is clean and safe. If you want, we can perform post-decontamination tests to confirm.

Then we rebuild: new drywall, insulation, paint, flooring as needed.

We Serve All Areas of Lévis

Whether you're on the Plateau, in Saint-Romuald near Main Street, in Charny on Route des Rivières, in Saint-Nicolas near Marie-Victorin, in Pintendre, in Saint-Jean-Chrysostome, in Old Lévis, in Lauzon, or in Saint-Étienne—we travel everywhere.

We know the particularities of each area: the old damp basements in Old Lévis, the houses near the river in Saint-Romuald, the poorly insulated bungalows in Saint-Étienne.

FAQ — Frequently Asked Questions About Isolation and Decontamination

Can mold make you sick?

Yes. Prolonged exposure to mold can cause respiratory problems, allergies, asthma, headaches, and fatigue. It's important to remove it as soon as you see it.

How can I tell if I have asbestos in my home?

If your house was built before 1990, there is a good chance that there is asbestos somewhere. Laboratory tests can be done to confirm this before starting renovations.

Can I stay in the house during the renovation work?

It depends on the extent of the problem. For minor mold issues, yes. For asbestos or major decontamination, it is often recommended to leave the house for 2-3 days.

How much insulation is needed in an attic in Lévis?

At least R-50 according to current standards. Most older homes only have R-20 to R-30, so you need to add about 12-15 inches of blown insulation.

Will insulation really reduce my heating bill?

Yes. A well-insulated attic (R-50) can reduce your heating costs by 20-30%. It pays for itself in 5-7 years.

What causes mold in basements?

Moisture: water infiltration, condensation, poor ventilation, or clogged drains. The source of moisture must be addressed before removing mold, otherwise it will return.

Ready to breathe clean air in your home?

Your home is where you live, where your children grow up. The air you breathe must be clean, healthy, and safe. And your home must be well insulated to stay comfortable in winter and save on heating costs.

Stop living with mold, humidity, or a poorly insulated home. We are based in Lévis, we have the equipment and expertise, and we do it safely in accordance with all standards.

Call us at 418-476-1747 or fill out the form for your free assessment.

5-year warranty · RBQ license 5811-7821-01 · Over 500 satisfied customers in Lévis and on the South Shore.