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NORTHERN IRELAND'S CAVITY WALL INSULATION EXPERTS

Cavity Wall Insulation

Why Choose Certainfil?

After 30 years of use throughout the UK the KIWA state, "No failure of any bonded bead system has ever been reported to the Board."

Save Up To 40% On Home Heating Bills With Professional Insulation

Loft Insulation

Insulation Extraction

We are a second generation family business specialising in Bonded Bead Cavity Wall insulation & extraction and Fibreglass quilting loft insulation. 

KIWA Certified Home Insulation Installers

25 Year Qualitymark Protection Guarantee

No VAT Charged On Insulation

Minimum Mess & Disruption

We Offer Insulation Grants Under The NISEP Thermal Warmth Scheme

Insulate Your Home & Save Money

Cavity wall insulation is the most cost effective way of cutting your heating bills, you can save up to 40% on your fuel bills and it benefits the environment as well as your pocket.

An un-insulated home can lose 35% of its heat through walls and 25% through the loft.

Properly insulating your home can dramatically reduce heating bills and increase warmth. The risk of black mould growth developing within the house is also reduced.

We use the highest grade insulation systems.  Studies have shown that insulation extraction and refill with our silver EPS beads has led to a 40% uplift in home heating.
We use the highest grade insulation systems.  Studies have shown that insulation extraction and refill with our silver EPS beads has led to a 40% uplift in home heating.
The insulation only takes one day to complete and as it is external no one is required to be at home. The material only arrives on site the day it is to be injected so no storage is required.
After 30 years of use throughout the UK the KIWA state, "No failure of any bonded bead system has ever been reported to the Board."
The insulation only takes one day to complete and as it is external no one is required to be at home. The material only arrives on site the day it is to be injected so no storage is required.
The insulation only takes one day to complete and as it is external no one is required to be at home. The material only arrives on site the day it is to be injected so no storage is required.
High Grade Insulation System
Quick & Convenient Service
Guaranteed Results
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Book Your FREE No-Obligation Quote Today

Customer Testimonials

"This is the second time I've used Certainfil, and on each occasion they have been so professional. These guy’s are clean, tidy and courteous in the way they carry out their work. Would recommend this company all day long."

Paul Cathcart

"Just had a job completed by this company an extraction of cavity wall insulation and repumped! The most efficient and hard working crew :) very clean and tidy! Job completed without any trouble and can not even notice drill marks! Highly recommended, top class."

Gerard Corr

"Had cavity wall insulation installed recently by Certainfil. Workmen completed the job quickly with no fuss, including installing a necessary vent. Our house has been noticeably warmer since and we are very happy with the work completed. Thank you."

Richard Moore

"From the initial phone call enquiry, right through to billing I can't fault Certainfil.  Very professional, they explained everything that would happen and delivered an excellent service.  Was able to feel the benefits of the cavity insulation straight away. Highly recommend!"

Ruth Watson

Do You Qualify For An Insulation Grant?

The Affordable Warmth Scheme is the Department for Social Development’s new scheme for addressing fuel poverty in the private sector across Northern Ireland. There is a range of energy efficiency measures available under the Affordable Warmth Scheme, including insulation, ventilation and draught-proofing. 

Certainfil Cavity Insulation can carry out work under the AFFORDABLE WARMTH SCHEME.

Single person household income less than £28k or dual household income of less than £40k.

If you qualify to receive the grant, contact us to make an appointment and find out more about the services we provide under the Affordable Warmth Scheme.

Contact Us

Get in Touch
We are a second generation family business specialising in Bonded Bead Cavity Wall insulation & extraction and Fibreglass quilting loft insulation.

KIWA Certified Home Insulation Installers

25 Year Qualitymark Protection Guarantee

No VAT Charged On Insulation

Minimum Mess & Disruption 

We Offer Insulation Grants Under The NISEP Thermal Warmth Scheme

Contact Us Now

Stay Warm, Save Money, and Prevent Mould with Certainfil Insulation

Get in Touch
After 30 years of use throughout the UK the KIWA state, "No failure of any bonded bead system has ever been reported to the Board."
The insulation only takes one day to complete and as it is external no one is required to be at home. The material only arrives on site the day it is to be injected so no storage is required.
After 30 years of use throughout the UK the KIWA state, "No failure of any bonded bead system has ever been reported to the Board."
"Had cavity wall insulation installed recently by Certainfil. Workmen completed the job quickly with no fuss, including installing a necessary vent. Our house has been noticeably warmer since and we are very happy with the work completed. Thank you."

Richard Moore

"This is the second time I've used Certainfil, and on each occasion they have been so professional. These guy’s are clean, tidy and courteous in the way they carry out their work. Would recommend this company all day long."

Paul Cathcart

Ruth Watson

"From the initial phone call enquiry, right through to billing I can't fault Certainfil.  Very professional, they explained everything that would happen and delivered an excellent service.  Was able to feel the benefits of the cavity insulation straight away. Highly recommend!"

Gerard Corr

"Just had a job completed by this company an extraction of cavity wall insulation and repumped! The most efficient and hard working crew :) very clean and tidy! Job completed without any trouble and can not even notice drill marks! Highly recommended, top class."

3 Fairway Gardens

Malone, Belfast 

BT9 5NP

Save £100's On Heating Bills

Stay Warm

Prevent Damp & Mould