Windows & Doors

Highest Standards in Performance & Thermal Efficiency with U-Values as low as 0.8W/m2K
Examining the condition of your windows and doors is crucial when contemplating energy improvements for your home, as they account for a significant portion of heat loss.

In fact, outdated or deteriorating windows contribute to more than 20% of the total heat loss within a house.

While homeowners often prioritise aesthetics when upgrading their windows, we strongly recommend making “U-values” your top priority over any other factor to ensure the long-term sustainability of your home.


U-values refer to the measure of a window’s thermal efficiency and its ability to retain heat.

By focusing on U-values, you can help future-proof your home and make your home more energy-efficient, reducing heat loss and potentially saving on energy costs in the long run.

U-values are a metric for assessing thermal efficiency, with a lower value indicating superior heat retention characteristics in the material. U-values take into account all components of the window including the frame, glass, and spacer bar; therefore the lower the U-value, the more energy-efficient the window.

Insulex brings you the best in window upgrades … download our window brochure

The windows we choose to use are super-efficient, 40 mm Triple-Glazed with a U-value as low as 0.8W/m2K, as standard.

We have chosen these high-performance windows for our clients as standard for the various features and benefits outlined below as well as the sustainability values of the production company.

Virtually Zero Production Carbon Footprint 

All production – recycling, extrusion, glass production, and manufacture is all carried out at the manufacturing location.

They use up to 80% recycled material, have their own recycling plant on site, and have earned a Carbon Trust Footprint accreditation as well as being
ISO 14001 and ISO 9001 Certified.

These windows are energy efficient by design; multi-chambers within the profile system significantly reduce heat and energy loss from inside the home and reduce frame carbon emissions by up to 70%.

The windows are salt spray tested for 600 hours (up to 3 times more than the industry standard) thereby ensuring longer-term performance.

All Window frames feature up to 80% recycled material as well as … 

  • Heat Reflecting Glass
  • Absorbs solar energy from outside & reflects internal heat back into the home
  • Superior Performance with U-values as low as 0.8 W/m2K, as standard
  • Multi-Point Locking System as standard
  • Heavy-duty hinges
  • Internally Glazed for Extra Securit
  • Multi-chamber design minimizes heat loss through the frame
  • Independently tested and certified
  • Easily managed and maintained

We take away your old windows and recycle them for you … 

Once we have your new energy-efficient windows in place, we take away your old windows, separate the frames and glass, and recycle them accordingly for you.

Insulex Precision Installation:

First, we cut back the reveals to create a clean installation space. Next, we ensure a tight fit for the window, minimising any gaps or drafts.

We apply airtightness tape meticulously around all the reveals of the window. This includes the removal and subsequent refitting of window boards, as well as re-plastering around the windows to maintain an airtight seal.

Unlike some methods, we avoid using silicone when installing windows. This commitment to quality ensures that we meet the highest possible standards while optimising efficiency.

With the Insulex method, your windows will be installed with precision and care, providing you with both comfort and energy savings.

SEAI Grants for Window and Door Upgrades

If you upgrade your home using the One Stop Shop grant, the SEAI gives an allowance for window upgrades and 2 external doors. You can read more about our One Stop Shop service HERE.

Free Consultation

If you are ready to do some upgrades in your home and would like some professional advice and information on grants, book a free consultation with us and one of the team will call you back to assist you.