Energy Efficient Insulation Tape.

The Future is Here

Window Insulation Tape

Window insulation tape: we have trusted Iso-Chemie Windows insulation tapes for years. Initially, we used ISO-BLOCO WIN2WALL, a multi-functional tape tailored for the UK market. This tape enhanced the installation of A, A+, and A++ energy-rated windows, often providing a better U-value at the joint between the window and wall than the window itself. Weather-tested to 600 Pa, it expanded from 2mm to 8mm, offering benefits for both installers and homeowners.

ISO-BLOCO-ONE: The Upgrade

ISO-BLOCO-ONE replaced WIN2WALL, offering improved insulation properties and easier on-site installation. Expanding to fill gaps from 2mm to 12mm and weather-tested to 750 Pa, it became our standard insulation tape for brick-to-brick openings.

Advanced Technology: Multi-Functional Joint Insulation Tape

The ISO-BLOCO HYBRATEC Window insulation tape takes insulation to the next level. It ensures airtightness and prevents heat loss through convection, offering superior thermal and acoustic insulation. Weather-tested to 1,050 Pa, this tape outperforms standard requirements, adapting to the challenges of climate change. Its 100% waterproof design eliminates drafts and water ingress, expanding and contracting with seasonal changes. This tape is ideal for modern homes, adhering to the “inside tighter than outside” principle, providing maximum thermal protection.

New Window U-Values

Since June 15, 2022, all windows and doors must have a minimum U-value of 1.4 W/m²K. This key metric measures energy efficiency. A double-glazed window with a U-value of 1.4 means 1.4 watts will transfer per square meter for every degree of temperature difference between the inside and outside. Understanding this requirement is essential for ensuring energy efficiency in your home.

Tackling Draughty Windows

Heat often escapes through the expansion gap around the window frame, leading to drafts. Traditional methods like expanding foam and silicone sealing do not create long-lasting thermal or acoustic barriers. This results in heat loss and reduced soundproofing, which can significantly lower the window’s overall U-value. High-performance windows lose their effectiveness if paired with inefficient sealing methods.

ISO-BLOCO HYBRATEC: The Window Insulation Tape Solution

ISO-BLOCO HYBRATEC Window insulation tape is a game-changer. This tape seals windows and doors precisely, enhancing energy savings and soundproofing. Its 64mm width fits a 70mm frame, expanding from 3mm to 14mm. This tape is ideal for use with Pilkington Optiphon™ Glass Units for superior soundproofing. By integrating multiple barrier layers, this tape is also a Passive House-approved component.

ISO-BLOCO HYBRATEC tape is applied to the front of the frame edge before installation, expanding to fill gaps and sealing the perimeter between the brickwork and frame. This 100% airtight seal prevents heat loss and improves energy efficiency. The tape offers UV stability for ten years and a life expectancy of 40 years, eliminating the need for silicone, foam, or trims.

Versatility and Durability

ISO-BLOCO HYBRATEC Window insulation tape suits various applications, including Casement Windows, Tilt N Turns, Bi-Folding Doors, Patio Doors, and French Doors. It can be installed in any weather and offers a 3-in-1 multi-function solution with thermal, acoustic, and airtight properties. The tape withstands driving rain at 1,050 Pa, reduces sound by up to 56dB, and provides a U-value of 0.55 in a 10mm joint, making it ideal for energy-efficient homes.

Ideal for Building Regulations

ISO-BLOCO HYBRATEC insulation tape meets Approved Document C for weather-tightness and moisture resistance, ensuring your home is energy-efficient and draft-free. This tape significantly improves living conditions, reduces energy bills, and offers long-term performance with minimal maintenance. Available in various sizes, this tape is impervious to extreme temperatures and far superior to other tapes on the market.

Intelligent Sealing Functions

This tape operates on four principles: external weather resistance, middle thermal and acoustic insulation, and internal air tightness. It adapts to structural movement, prevents wind, dust, and moisture ingress, and complies with energy-saving regulations.

Upgrade for Windows & Doors

Combine our A+ uPVC Casement Windows and A++ Triple-glazing with ISO-BLOCO HYBRATEC insulation tape for superior thermal efficiency. Whether it’s Tilt-N-Turns, French Doors, Inline Patio Doors, or Bi-Fold Doors, this insulation tape ensures your home stays warm, safe, and secure.

Want to know More?

Call us today for your FREE, no-obligation quotation or fill out our Contact Form! For the most modern, energy-efficient replacement Windows, Doors and Conservatory with a 10-year Insurance Backed Guarantee for complete home Comfort & Designed to Keep You Warm, Safe, & Secure.

Alternatively, call your local number below to arrange an appointment.

East London Window Insulation Tape: 020 8472 4088 (head office)
South London Window Insulation Tape: 0203 856 6667
North London Window Insulation Tape: 0203 856 6669
Chelmsford Window Insulation Tape: 01245 208 058
Romford Window Insulation Tape: 01708 2 02 457
Great Dunmow Window Insulation Tape: 01371 704 771

huong Luc

14:01 19 Dec 24

The team was led by Peter - great comms, double glazing patio door to insulate the ground floor bedroom, replaces single glaze door. After installation there was a slight problem but it was resolved in good time. Thank you.

Laurence Radford

15:17 19 Nov 24

Roy and team did an excellent and professional job replacing 3 front windows, making the change unnoticeable from the outside. They were worked with challenges getting large frames into the upstairs room and were courteous throughout. Would recommend.

Kate Cleaver

11:03 14 Nov 24

Really happy I chose Southeast Windows to fit my UPVC back door. Roy was friendly, professional and helpful at every step of the process. I was very happy with the workmanship and it was done so efficiently and with so little mess. I definitely recommend for a first class service !

Derek Wong

08:30 30 Oct 24

I would like to express my heartfelt thanks to Southeast Windows for their exceptionally good service. From the moment I reached out to them, their team demonstrated professionalism and efficiency that truly impressed me. The installation process of double glazing was remarkably fast, allowing me to enjoy the warmth of the new windows brought sooner than expected.Moreover, I was particularly impressed with the cleanliness maintained throughout the whole installation project. The team took great care to ensure that my home remained tidy, leaving no mess behind. This attention to detail speaks volumes about their commitment to customer satisfaction.Besides, the quality of the windows is outstanding. The windows not only enhance the aesthetic appeal of my home but also provide excellent insulation. I am thrilled with the results and would highly recommend Southeast Windows to anyone in need of window services. Thank you Roy and your team once again for your hard work and dedication!

Marc Jones

12:47 21 Jun 24

Amazing company and service. High quality work at very good price. Very efficient with great communication throughout. Would 100% reccomend.

David Gridley

11:10 07 Sep 23

Excellent work from Roy and his team. He installed our windows quickly and with a minimum of dust etc. They also took away the old windows which was a great help.

Arnold Cabanus

21:11 06 Mar 23

We recently had all our old windows replaced and installed by Southeast Windows. Everything, from the survey to the installation day runned smoothly .We are delighted with the excellent window installations that they did and left our house clean and tidy after. This company is very trustworthy , professional and courteous. If you need an honest and efficient windows installation company, definitely Southeast Windows Ltd is highly recommended.

Leah Corney

16:38 10 Feb 23

We chose southeast windows to replace our old upvc windowsfrom initial survey company were very informative explaining different options available fensa warranty fire regs etcquotation was very competitive detailing all widow specifications everything what we was getting including removal of all rubbishSo glad We went with triple gazing option not that much extraguys arrived early every morning we’re courteous and professional at all times did a fantastic job of installing windows clean and tidywindows look fantastic house is so much warmer and noise reduction really please we choose this company would definitely use againHighly recommend

Steve Clare

16:01 04 Oct 22

Had the double-glazing at the front of my house replaced. Really impressed with the quality of the work and the value for money. Roy is a real expert. All in all, absolutely delighted and very happy to recommend Southeast Windows. Five star review.

Hilary Armstrong

15:11 08 Sep 21

Roy and his team fitted new windows and French doors in our house earlier this year (we wanted to live with them for a while before reviewing!). We are really pleased with the quality of the windows and the service from Roy. He's a real gent to deal with and is punctual and professional. His quote wasn't actually the lowest but he was the only one to supply full details of materials, give fire safety and security advice, send a detailed quote etc. Thank you Roy

Megan Monaghan

10:33 04 Jun 21

I got quotes from a few companies however Peter was the only one who followed up to my questions on email so I decided to go with Southeast Windows. I am super glad I did, as Peter was professional and I am really happy with the work done in installing a new PVC backdoor and replacing glass in several windows. Peter was knowledgable, friendly and didn't take advantage of my lack of knowledge of window and door installation like some other builders have, being a first time home owner.I wouldn't hesitate to recommend Peter and Southeast Windows, I will for sure be using them again if I need. Thank you Peter!