# Clean Tech Construction, LLC

**Trade:** Insulation & Weatherization · **Address:** 40 Messina Dr, Braintree, MA 02184, USA · **Phone:** (617) 271-0768 · **Website:** https://cleantechconstructionllc.com/contact/ · **Languages:** English

**Rating: 3.6/5** (high confidence) — from 40 reviews across 5 sources.
88% of sentiment-scored reviews read net-positive. Last 6 months: 7 reviews, 1 negative.

## The honest read

"The unknown sub-contractors" is how one homeowner described Clean Tech Construction in a May 2025 review — the crew that turned up for a National Grid / Mass Save efficiency upgrade he had arranged with somebody else, set his expectations, then beat them. That is a lot of this Braintree company's work: insulation and air sealing delivered through the Mass Save program, where the homeowner meets the installers on the day. A customer writing in July 2026 had exterior wall insulation put in over the previous winter with Mass Save paying 75 percent, and said the company was clear from the start about what the job involved.

The installers get named. Tiago, Everton and Walter finished a house in two days in November 2025 and left the inside and outside in good order. Kevin and Steve worked a tight crawl space and a hard-to-reach attic and roof in October 2025. Chris, Steve and Jamal weatherized a two-unit condo's attic in August 2025 in outside temperatures above 90 degrees. That same month another customer had a blower door test run before and after the work to confirm the efficiency gain, and in March 2026 an Angi reviewer had old insulation pulled out and replaced, including areas a previous company had not managed to reach.

Not every site has gone that way. In May 2024 a customer found cigarettes and nails left across the driveway and yard and a broken hose. In October 2024 another said a crew tried to install insulation in a basement full of leaves, and that the supervisor treated him as the problem rather than the dirty insulation. In April 2025 a homeowner on a RISE Engineering energy upgrade described mistakes, a failure to clean up and staff who were not on the same page internally. Google's average across 30 ratings is 4.3.

Two more things to know before calling. Bill Davidson and Joel Perez started the company about four years ago after 25 years in the installation business, and the site's own pages also advertise "since 2005", "25 years of experience" and "35 years of experience" — figures that describe the founders' careers, not the firm's. And the Massachusetts paperwork is in order: home improvement contractor registration #212828 is active on the state registry, and the state's Supplier Diversity Office lists an active Minority Business Enterprise certification running to February 2028. A one-star review from March 2026 is not about a job at all — another business writes that it received harassing text messages and was blocked after speaking to the owner.

For attic, wall or crawl-space insulation, especially a job routed through Mass Save, this is a crew doing that exact work week in and week out. Ask who the site lead will be and what the daily protection and cleanup look like, and get that written down before the truck arrives.

**Strengths:**
- Mass Save installs — one winter job had 75 percent covered by the program
- Named installers — customers credit the crew members by name
- Measured results — a blower door test run before and after the work
- Awkward spaces — tight crawl spaces and attics a previous company missed
- MBE certified — state minority business certification active to February 2028

**Concerns:**
- Cleanup complaints — nails, cigarettes and a broken hose in a 2024 review
- Debris left under insulation — a 2024 customer describes a leaf-filled basement
- Subcontract job went wrong — a 2025 RISE upgrade had mistakes and no cleanup
- Conflicting tenure claims — its own pages say 2005, 25 years and 35 years
- Non-customer complaint — another business reports harassing texts in March 2026

**Where sources disagree:**
- The company's own pages give four inconsistent tenure figures: an About headline of "Making Homes Energy Efficient Since 2005" and "25 years Of Experience", an About text saying the founders started Clean Tech about four years ago after 25 years in installations, and a Contact page claiming "35 years Of Experience".
- Two 2023 HomeAdvisor reviews credit a "Mike" at Clean Tech Construction with repairing siding and assessing and rebuilding a roof, while the company's own website states it is an insulation, air sealing and mini-split contractor and not a general-remodeling company.

## Claims & citations

Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication.

- Massachusetts home improvement contractor registration #212828 is active on the state registry under Clean Tech Construction Inc. _(confidence: high)_
  - [State License Registry](https://contractorhub.mass.gov/s/hic-contractor-search) — “MA hic license 212828 registry-verified active — registry holder of record: Clean Tech Construction Inc.”
- The Massachusetts Supplier Diversity Office lists Minority Business Enterprise certification 20240583 as active through February 2028 _(confidence: high)_
  - [Diversity Certification Registry](https://diversitycertification.mass.gov/BusinessDirectory/BusinessDirectorySearch.aspx) — “Massachusetts Supplier Diversity Office Minority Business Enterprise (MBE) certification 20240583 verified active — registry holder of recor…”
- A home energy-efficiency contractor doing insulation, air sealing and ductless mini-split installation, working with homeowners through the Mass Save program _(confidence: high)_
  - [Official Website](https://cleantechconstructionllc.com) — “Clean Tech Construction, LLC of 40 Messina Dr, Braintree, MA is a home energy-efficiency contractor doing insulation, air sealing and ductle…”
  - [Official Website](https://cleantechconstructionllc.com) — “Stated certification/affiliation: States it works together with the Mass Save® program and helps homeowners navigate it”
- Mass Save work handled end to end — a July 2026 customer had exterior wall insulation installed with the program covering 75 percent of the cost _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2sxeWNqTlFaRUpGUkVodlJuTnRSazB4ZWpOUVdrRRAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOk1ycjNQZEJFREhvRnNtRk0xejNQWkE%7C%7C?hl=en) — “5★ This past winter Clean Tech Construction added wall insulation to our house from the outside. They did the work through Mass Save, which …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VPanJsdVNmczR6dUJREAE!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CIHM0ogKEOjrluSfs4zuBQ%7C%7C?hl=en) — “5★ Vince and his team did a great job installing insulation in our home.  It’s over 200 years old and they demonstrated care and knowledge o…”
- Installers named by customers — Tiago, Everton and Walter completed one house in two days in November 2025 and left the interior and exterior in good condition _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xaaGJta3pWa0pIY25CQ1ZqRm1NMGgxVlRRNU1uYxAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOlZhbmkzVkJHcnBCVjFmM0h1VTQ5Mnc%7C%7C?hl=en) — “5★ I recently had a 100 year old family house insulated by Clean Tech Construction. Steven and Kevin did an amazing job.  They both were so …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21jdGJYcHRUbDluWm5WZmJEZDZVR3hLVkVaQldsRRAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOmctbXptTl9nZnVfbDd6UGxKVEZBWlE%7C%7C?hl=en) — “5★ Clean Tech did a fantastic insulation installation in my home.  Tiago, Everton ably assisted by Walter worked tirelessly, respectful of t…”
- Efficiency gain measured — an August 2025 customer had a blower door test run before and after the insulation work _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xSWFpGQk9Nbk5FVVhaMk0yczBaRTR3ZVZwVk1GRRAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOlRXZFBOMnNEUXZ2M2s0ZE4weVpVMFE%7C%7C?hl=en) — “5★ Clean Tech Construction did a fantastic job insulating my home! The crew members arrived on time, were friendly and efficient, and explai…”
- Awkward spaces taken on — a tight crawl space and a hard-to-reach attic and roof in October 2025, and a two-unit condo attic weatherized in August 2025 in over-90-degree heat _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xaUE1tTTNXakY0ZVhaNGRYTklNWGxNZFRkVVFsRRAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOlZPMmM3WjF4eXZ4dXNIMXlMdTdUQlE%7C%7C?hl=en) — “5★ Clean Tech Construction provided courteous, professional and thorough work, meticulously insulating a tight crawl space and difficult to …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21kSldHbERaVXRITkd0R1JUWlBPVXhNYW04MGRrRRAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOmdJWGlDZUtHNGtGRTZPOUxMam80dkE%7C%7C?hl=en) — “5★ During the recent heat wave with temps outside over 90 degrees, Chris and Steve who led this crew and Jamal who assisted were outstanding…”
- A March 2026 Angi customer had poorer-quality insulation removed and replaced, including areas a previous company had not been able to reach _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21GT1JYZDZORVZQVDB0V1ZHOXRlWFp5U1c0MWJXYxAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOmFORXd6NEVPT0tWVG9teXZySW41bWc%7C%7C?hl=en) — “5★ Clean Tech Construction did a great job of insulating the kneewall in my attic. They responded quickly to my phone calls, removed the old…”
  - [Angi](https://www.angi.com/companylist/us/ma/weymouth/clean-tech-construction-llc-reviews-162287265.htm) — “5★ Clean Tech Construction was terrific! The team arrived slightly before the scheduled time, removed the old, poorer quality insulation, in…”
- A May 2024 customer said workers left cigarettes and nails across the driveway and yard and broke a hose _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUN6N0s2Smx3RRAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CIHM0ogKEICAgICz7K6JlwE%7C%7C?hl=en) — “1★ Installed insulation - their workers left cigarettes and nails all over our driveway and yard. We politely asked them to keep their cigar…”
- An October 2024 customer said a crew tried to install insulation into a basement full of leaves and that the supervisor treated him as the problem _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUNYeFlHUHlBRRAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CIHM0ogKEICAgICXxYGPyAE%7C%7C?hl=en) — “1★ Yeah, just no . . .

Two guys came in to do work MASS Save had authorized for our house last week.  Tried to put in insulation in the bas…”
- An April 2025 homeowner on a RISE Engineering energy upgrade described mistakes, a failure to clean up and a breakdown in communication among staff _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTURvd1lUbEF3EAE!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CIHM0ogKEICAgMDowYTlAw%7C%7C?hl=en) — “1★ One headache after another dealing with this company - which was a subcontractor to RISE Engineering for a MA home energy upgrade.  Mista…”
- A one-star review posted in March 2026 comes from another business, which says it received harassing text messages and was blocked after speaking to the owner _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25OQ2RraE1Rbkp6WWtvMFJXeGhiR2w0ZFc0eVZHYxAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOnNCdkhMQnJzYko0RWxhbGl4dW4yVGc%7C%7C?hl=en) — “1★ They use their business to send harassing text messages to other places of business. Spoke to the owner, and then was blocked.”
- The company's own website gives four different tenure figures — "since 2005", "25 years of experience", "35 years of experience", and founders who started it about four years ago _(confidence: medium)_
  - [Official Website](https://cleantechconstructionllc.com) — “Company history (self-reported): The site's own pages give four different and mutually inconsistent figures: the About page headline reads '…”
- Started by Bill Davidson and Joel Perez after 25 years working in installations _(confidence: medium)_
  - [Official Website](https://cleantechconstructionllc.com) — “Company history (self-reported): The site's own pages give four different and mutually inconsistent figures: the About page headline reads '…”
  - [Official Website](https://cleantechconstructionllc.com) — “Ownership (self-reported): Started by Bill Davidson and Joel Perez”
- Google shows 4.3 stars from 30 ratings; Angi and HomeAdvisor each show 5.0 from 11 _(confidence: high)_
  - [Google](https://maps.google.com/?cid=4297330181745098773&g_mp=CiVnb29nbGUubWFwcy5wbGFjZXMudjEuUGxhY2VzLkdldFBsYWNlEAIYBCAA) — “Google: 4.3★ from 30 ratings”
  - [Angi](https://www.angi.com/companylist/us/ma/weymouth/clean-tech-construction-llc-reviews-162287265.htm) — “Angi: 5.0★ from 11 ratings”
  - [HomeAdvisor](https://www.homeadvisor.com/rated.Cleantechconstructionmi.62290892.html) — “HomeAdvisor: 5.0★ from 11 ratings”
- Specializes in Insulation & Weatherization _(confidence: high)_
  - [Official Website](https://cleantechconstructionllc.com) — “Clean Tech Construction, LLC of 40 Messina Dr, Braintree, MA is a home energy-efficiency contractor doing insulation, air sealing and ductle…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21ZeGRGWnFNazB5UVU1cmVFTnZjR0poT1dwUWRrRRAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOmYxdFZqMk0yQU5reENvcGJhOWpQdkE%7C%7C?hl=en) — “5★ From setting up the work date from the office, to the great crew who completed the insulation work in our attic and basement I would high…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xSWFpGQk9Nbk5FVVhaMk0yczBaRTR3ZVZwVk1GRRAB!2m1!1s0x0:0x3ba32f08357b4015!3m1!1s2@1:CAIQACodChtycF9oOlRXZFBOMnNEUXZ2M2s0ZE4weVpVMFE%7C%7C?hl=en) — “5★ Clean Tech Construction did a fantastic job insulating my home! The crew members arrived on time, were friendly and efficient, and explai…”
  - [Angi](https://www.angi.com/companylist/us/ma/weymouth/clean-tech-construction-llc-reviews-162287265.htm) — “5★ Clean Tech Construction was terrific! The team arrived slightly before the scheduled time, removed the old, poorer quality insulation, in…”
- Also offers HVAC / Heating & Cooling _(confidence: medium)_
  - [Official Website](https://cleantechconstructionllc.com) — “Clean Tech Construction, LLC of 40 Messina Dr, Braintree, MA is a home energy-efficiency contractor doing insulation, air sealing and ductle…”

## Ownership

- **Certified minority-owned** — verified against Massachusetts Supplier Diversity Office (MBE #20240583, verified 2026-08-12). Re-check: https://diversitycertification.mass.gov/BusinessDirectory/BusinessDirectorySearch.aspx

## License

Status: **active** (#212828, hic) — verified against the official MA state registry on 2026-09-13, never self-reported.
Re-check at the official registry: https://contractorhub.mass.gov/s/hic-contractor-search

## Sources

- [HomeAdvisor](https://www.homeadvisor.com/rated.Cleantechconstructionmi.62290892.html): 5.0★ from 11 ratings
- [Angi](https://www.angi.com/companylist/us/ma/weymouth/clean-tech-construction-llc-reviews-162287265.htm): Listed on this source
- [Google](https://www.google.com/maps/search/?api=1&query=Clean%20Tech%20Construction%2C%20LLC&query_place_id=ChIJO9Xtmp6C5IkRFUB7NQgvozs): 4.3★ from 30 ratings
- [Official Website](https://cleantechconstructionllc.com): Self-reported profile and service details
- [Google Reviews](https://www.google.com/maps/search/?api=1&query=Clean%20Tech%20Construction%2C%20LLC&query_place_id=ChIJO9Xtmp6C5IkRFUB7NQgvozs): Listed on this source

## Recent reviews

- **5/5 · Google Reviews · Ken Richman · 2026-07-07**: This past winter Clean Tech Construction added wall insulation to our house from the outside. They did the work through Mass Save, which paid for 75% of it. Clean Tech Construction made it very clear about what we were getting into, which was important because in our case about half of our siding is…
- **5/5 · Google Reviews · george delaney · 2026-06-24**: Hard workers, fair prices, good communication. Tough to beat.
- **5/5 · Google Reviews · Jose Fernandes · 2026-05-08**: I had a great experience with this company. The crew they had working at my house was very professional, respectful, and hardworking throughout the entire job. They took the time to answer all of my questions and made sure I fully understood everything that was going on every step of the way.
- **5/5 · Google Reviews · Dominic Amenta · 2026-04-16**: Phenomenal insulation job by the Clean Tech Solutions team. Rooms are warmer, heating bills are lower, highly recommend to anyone looking to do the same at their home or office.
- **5/5 · Google Reviews · Daniel Perenick · 2026-03-31**: From setting up the work date from the office, to the great crew who completed the insulation work in our attic and basement I would highly recommend Clean Tech Construction.   Easy to work with and left our home neat and clean when they finished.
- **1/5 · Google Reviews · Jes G · 2026-03-26**: They use their business to send harassing text messages to other places of business. Spoke to the owner, and then was blocked.
- **5/5 · Google Reviews · Lorna Gibson · 2026-03-20**: Clean Tech Construction did a great job of insulating the kneewall in my attic. They responded quickly to my phone calls, removed the old insulation, installed new insulation and cleaned up everything before finishing the job. I found the staff to be helpful and polite. I would hire them again in a …
- **5/5 · HomeAdvisor · Lorna G. · 2026-03-01**: Clean Tech Construction was terrific! The team arrived slightly before the scheduled time, removed the old, poorer quality insulation, installed new insulation, including areas that a previous company had not been able to reach, and cleaned up everything before they left for the day. When I initiall…
- **5/5 · Google Reviews · Richie Eats · 2026-02-03**: Bill was great to work with! Had a hiccup throughout the process but it was addressed and fixed promptly. Bill made it incredibly easy and made sure everything was done right. Great customer service is hard to come by now a days. 10/10 would recommend!!
- **5/5 · Google Reviews · Janice Johnson · 2025-12-03**: I recently had a 100 year old family house insulated by Clean Tech Construction. Steven and Kevin did an amazing job.  They both were so respectful of the property and kept me well informed during the installation.  I now have a home that maintains the temperature that the thermostat is set at. I hi…

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Data freshness: last scanned 2026-07-31T05:52:13.741Z.
Cite as: Clean Tech Construction, LLC — Tavlee (https://tavlee.com/contractor/clean-tech-construction-llc-braintree)
Source: https://tavlee.com/contractor/clean-tech-construction-llc-braintree