What questions should I ask a blown-in insulation contractor before work begins in Dieppe?

Before hiring a blown-in insulation contractor in Dieppe, ask specific questions about their experience, methods, and guarantees to ensure you get quality work that performs well in New Brunswick's Maritime climate.

The right questions will reveal whether you're dealing with an experienced professional who understands building science or someone who just owns a blowing machine. Here's what to ask:

Experience and Credentials

"How long have you been installing blown-in insulation in New Brunswick?" Look for contractors with at least 3-5 years of local experience. NB's cold winters and Maritime humidity create specific challenges that out-of-province or inexperienced contractors often misunderstand. Ask for references from recent Dieppe or Moncton-area projects you can contact.

"Do you carry WorkSafeNB coverage and general liability insurance?" Request to see current certificates. While WorkSafeNB isn't always required for residential work, it demonstrates professionalism. General liability insurance (minimum $1 million) protects you if something goes wrong during installation.

"What type of blown-in insulation do you recommend for my project, and why?" A knowledgeable contractor should explain the differences between cellulose and fibreglass, discuss R-values per inch, settling characteristics, and why they're recommending one over the other for your specific application. Cellulose provides R-3.6 per inch and better air sealing, while fibreglass offers R-2.5-3.7 per inch with less settling.

Installation Process and Quality

"Will you air seal before installing insulation?" This is the most important question. Professional contractors should identify and seal major air leaks — around pot lights, plumbing stacks, electrical penetrations, attic hatches, and rim joists — before blowing insulation. Air sealing provides 30-50% of the total energy benefit. If they say "the insulation will stop the air leaks," find another contractor.

"What final R-value will you achieve, and how will you measure it?" For Dieppe's Climate Zone 6, you want R-50 minimum in attics, ideally R-60. The contractor should measure depth at multiple points and calculate R-value based on the specific insulation type and density. Beware of contractors who only quote "inches" without specifying the R-value.

"How do you handle soffit ventilation?" Proper installation requires ventilation baffles (chutes) at every soffit bay to maintain airflow from soffit to ridge. The insulation should never block these vents. Ask to see photos of their baffle installation — this separates professionals from amateurs.

"What density will you achieve for wall insulation?" If you're having walls dense-packed, the contractor should target 3.5+ pounds per cubic foot. This density provides both insulation and significant air sealing. Lower densities won't stop air movement through the wall cavities.

Project Specifics and Guarantees

"Will you remove existing insulation if it's contaminated or insufficient?" Many Dieppe homes built in the 1970s-1980s have vermiculite insulation that may contain asbestos. Professional contractors can identify this and arrange proper testing and removal if needed. They should also remove wet, moldy, or severely compressed insulation rather than blowing new material over it.

"How do you handle moisture and vapour barriers?" In attic applications, they should work around existing vapour barriers without damaging them. For wall dense-packing, they need to understand that the interior drywall and paint act as the vapour retarder — no additional vapour barrier is needed or wanted on the exterior side.

"What's included in your price, and what might cost extra?" Get clarity on whether air sealing, ventilation baffles, attic hatch insulation, and cleanup are included. Some contractors quote low for just the insulation material and labor, then charge extra for essential components like air sealing and baffles.

"Do you guarantee your work, and what does that cover?" Look for contractors who guarantee their R-value achievement and will return to add material if settling occurs beyond normal expectations. Cellulose typically settles 15-20% in the first year — proper contractors account for this by initially over-filling.

Timing and Logistics

"When can you start, and how long will the work take?" Blown-in insulation work is best done in fall or early winter in Dieppe — after summer humidity drops but before the coldest weather arrives. A typical attic takes 4-8 hours; wall dense-packing takes 1-2 days depending on house size.

"How will you protect my home during installation?" Professional contractors should cover furniture, seal off work areas, and use dust control measures. Blown-in insulation creates significant dust, especially cellulose, and proper contractors take steps to minimize mess.

Red Flags to Watch For

Avoid contractors who can't answer these questions specifically, who quote significantly below others without explanation, who recommend skipping air sealing, or who suggest blown-in insulation for applications where it's inappropriate (like cathedral ceilings or below-grade walls). Also be wary of door-to-door contractors or anyone pressuring you to sign immediately.

Get at least three detailed quotes and compare not just price but scope of work, materials specified, and the contractor's knowledge level. The cheapest quote often skips essential steps like air sealing and proper ventilation management.

Need help finding experienced blown-in insulation contractors in the Dieppe area? New Brunswick Insulation can match you with local professionals who understand Maritime climate challenges and follow proper installation practices for lasting performance.