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The 10 Best Insulation Contractors in Portland (2026)
Portland’s mix of older homes, damp winters and a growing interest in energy efficiency make insulation contractors an essential part of local remodeling and maintenance. This list ranks the top insulation contractors serving the Portland area using Google review data, scored with a Bayesian-style method that weights average rating by review volume. The roundup was updated in 2026 to reflect recent customer feedback and review counts. We focused on firms categorized as insulation contractors on Google and prioritized objective review-based performance over claims or advertising.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
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Koala Insulation of West Portland
Koala Insulation of West Portland tops our ranking because it combines a perfect 5.0 Google rating with a substantial review total (201), one of the highest counts among five-star listings. That mix of top score and strong review volume gives it an edge in a review-weighted ranking. The name and Google category indicate it serves the West Portland area as an insulation contractor.
The full ranking
Hi-Provac
This Insulation contractor holds a 5.0 rating across 146 Google reviews and is listed in Portland, OR 97266; the Google profile shows a high average with substantial customer feedback.
146 reviews
The Spray Foam Company
A Google-listed Insulation contractor at 11813 NE Sumner St, Portland (NE Portland), it has a perfect 5.0 rating with 109 reviews, reflecting consistently high scores from reviewers.
109 reviews
HomeRx Insulation
With a 4.9 rating from 217 Google reviews, this Insulation contractor has the largest review count on the list and maintains a very high average score.
217 reviews
Elevate
Elevate appears as an Insulation contractor at 1631 NE Broadway #2050 in NE Portland and carries a 4.9 rating based on 181 Google reviews.
181 reviews
Northwest Weatherization
Listed as an Insulation contractor at 11115 SW Industrial Way #2 in Tualatin, OR, this company has a 4.9 Google rating from 112 reviews.
112 reviews
Quality Spray Foam Insulation Portland
This Insulation contractor is located at 3549 SE Main St in SE Portland and posts a 5.0 rating with 34 Google reviews.
34 reviews
Spray-On Foam & Coating Portland
Operating at 3400 NE Columbia Blvd in NE Portland, this Insulation contractor has a 5.0 rating from 31 Google reviewers.
31 reviews
Alpha Solutions
Alpha Solutions is listed as an Insulation contractor at 6426 SE 90th Ave in SE Portland and holds a 5.0 rating with 29 Google reviews.
29 reviews
Sycamore Insulation
Based at 837 Risley Ave in Gladstone, OR, this Insulation contractor has a 5.0 rating from 26 Google reviews.
26 reviews
Frequently asked questions
How should I choose an insulation contractor in Portland?
Look for contractors with relevant experience in the type of insulation you need, clear written estimates, proof of insurance and local references. Check recent online reviews and ask about ventilation, moisture control and any permits required for your project.
What does an insulation job typically depend on when it comes to cost?
Cost varies with the size of the area, the insulation material and R-value, accessibility (attics vs. walls), and whether existing insulation must be removed. Get multiple written quotes that break down materials, labor and any additional work like air sealing.
What should I check before hiring a contractor?
Confirm the contractor carries liability insurance and workers’ compensation, request references or recent project photos, and make sure the contract specifies materials, R-values, timelines and cleanup. Also ask whether permits or third-party inspections are needed for your location.
How was this ranking created and updated?
The list is based on Google review data and uses an average-rating approach weighted by review count (a Bayesian-style score) so firms with high ratings and substantial feedback rank higher. The guide was updated in 2026 to reflect recent review totals and averages.