Local insulation installers
Warmer homes. Quieter spaces. Better living.
Knauf ceiling batts, Mammoth underfloor and new build insulation for homes, businesses and schools across the Bay of Plenty, Coromandel, Hauraki, Gisborne and the East Coast, and inland to Rotorua and Taupō. Free, no-obligation quotes and competitive pricing.
- Licensed and insured
- No hidden fees
- Free quotes
Our insulation services
Whether you are upgrading an older home or building from the ground up, we recommend the right solution for your property and install it with care.
Warmth
Ceiling insulation
Often the priority for warmth. We fit Knauf batts, and most ceilings take 1 to 3 hours. Insulation in good condition may be topped up, while damaged insulation may need replacing.
Ceiling insulationCold floors
Underfloor insulation
A noticeable difference in older homes with raised timber floors. We install Mammoth underfloor insulation, typically in a day for a 100m² home, plus ground moisture barriers.
Underfloor insulationNew builds
New build insulation
Build comfort in from day one. Ceiling, wall and underfloor insulation installed at framing stage, fitted to your plans, before the linings go on.
New buildsOlder homes
Retrofit insulation
Upgrading an older home? We retrofit ceiling and underfloor insulation, remove old Insulfluff, fit ground moisture barriers and check what can stay.
Retrofit insulation
Quality products. Quick, tidy installs.
We use Knauf batts in ceilings and Mammoth in underfloors, for homes, businesses and schools. Typical install times for a 100m² home:
- Ceiling
- Knauf batts
- Typically 1 to 3 hours. From $1,600 to $2,000 for a 100m² home.
- Underfloor
- Mammoth
- Typically 1 day for a 100m² home. From $2,200 to $2,500 for a 100m² home.
Prices are a guide. Your quote depends on access and materials.
- New builds at framing stage
- Moisture barriers
- Insulfluff removal
- Healthy Homes assessments arranged
Why choose us
Your trusted insulation installation company.
If you're not satisfied, we're not finished. We stand behind every project, big or small.
Free, no-obligation consultations
Our team provides a free consultation to determine the best insulation solutions for your home or business.
Competitive pricing
A clear, detailed quote with no hidden fees, so you know exactly what is being installed and what it costs.
Fully licensed and insured
Peace of mind that you are working with a reputable, trustworthy company.
A team of four since 2023
Coastline started in 2023. We focus on quality insulation, fast service and competitive pricing, installed correctly and efficiently.
How it works
Every project starts with you. We take the time to understand your needs so the insulation fits your space, your goals and your budget.
Free consultation and assessment
Call 027 482 0333 or send the quote form, and we aim to call you back within 48 hours. Most assessments are done through our online system. For more complicated homes, or if you would rather, one of the team will come out to you.
A clear, detailed quote
You get a clear, detailed quote with no hidden fees, so you know exactly what is being installed and what it costs.
Scheduling and install
We agree a start date and timeline that suit you, then install efficiently and respectfully to keep disruption low. Most ceilings take 1 to 3 hours.
Final quality check
Once the job is done, we do a comprehensive quality check before we hand it back to you.
Recent jobs from the Coastline team.
Photos from our own jobs, from new build walls to a school ceiling.
Where we work
Local to the regions we serve.
Mainly coastal: homes, businesses and schools from the Coromandel to Gisborne, and inland to Rotorua and Taupō.
Home base
Bay of Plenty
Katikati, Tauranga, Mount Maunganui, Whakatāne and Ōhope.
Insulation in the Bay of Plenty
Now serving
Coromandel & Hauraki
Whangamatā, Whitianga, Coromandel Town and Tairua, plus Thames, Paeroa and the Hauraki Plains.
Insulation in the Coromandel and Hauraki
Where we started
Gisborne & East Coast
Gisborne, Māhia, Tolaga Bay and surrounding areas.
Insulation in Gisborne and the East Coast
Inland
Rotorua & Taupō
Rotorua and surrounding towns. We travel as far south as Taupō.
Insulation in Rotorua and Taupō
Getting a rental ready for Healthy Homes?
For landlords, we can help with the ceiling and underfloor insulation your rental needs, and we can arrange a Healthy Homes assessment for you. Here is what quality insulation can do for any home.
Stay warmStay cosy through the coldest months without overworking your heater.
Stay coolKeep your home fresh and comfortable all summer long.
Stay quietReduce outside noise for a calmer, more relaxing space.
Stay dryHelp keep your space drier, healthier and comfortable all year round.
5.0 from 12 Google reviews
Which regions do you provide insulation services to?
We work mainly along the coast: the Bay of Plenty (Katikati, Tauranga, Mount Maunganui, Whakatāne and Ōhope), the Coromandel and Hauraki (Whangamatā, Whitianga, Coromandel Town, Tairua, Thames, Paeroa and the Hauraki Plains), and Gisborne and the East Coast (Gisborne, Māhia, Tolaga Bay and surrounding areas). We also cover Rotorua and surrounding towns, and travel as far south as Taupō.
What insulation services do you provide?
We retrofit ceiling insulation with Knauf batts and underfloor insulation with Mammoth, install underfloor moisture barriers, and remove old insulation fluff (Insulfluff). For new builds, we install ceiling, wall and underfloor insulation at framing stage. We work on homes, businesses and schools.
How long does installation take?
Most ceiling installs take 1 to 3 hours. Underfloor insulation is typically a one-day job for a 100m² home. We agree a start date and timeline with you before any work begins.
Can you help with Healthy Homes for my rental?
Yes. We can install the ceiling and underfloor insulation your rental needs, and arrange a Healthy Homes assessment for you. Give us a call to talk it through.
Should I insulate the ceiling or underfloor first?
The best starting point depends on the gaps in your home. Ceiling insulation is often a priority for warmth, while underfloor insulation can make a noticeable difference in older homes with raised timber floors.
How much does insulation cost?
As a guide, ceiling insulation with Knauf batts is $1,600 to $2,000 for a 100m² home, and underfloor insulation with Mammoth is $2,200 to $2,500 for a 100m² home. Your quote depends on access and materials, so we price every job individually.
Get a free, no-obligation quote.
Local installers, not a call centre. Fill out the form or call us to schedule a free consultation, and we aim to call you back within 48 hours.
Prefer to talk? Call 027 482 0333 or email admin@