Building regs.
Stay ahead.

Directly in response to the UK Government announcements to the help the UK deliver net zero, and in particular in relation to the new UK Building regulations Part L (conservation of fuel and power) and the tightening of U-values.
Doors and windows will need to have vastly improved thermal efficiency ratings, which means lower U-values (lower the number, better the thermal efficiency), which overall means less energy is required to heat or cool a home.
To achieve this we needed to make some improvements, resulting in two new fantastic thermally efficient systems.

In a nut shell, lower energy bills, and a more comfortable environment to live in, whichever system you choose. Oh, and not forgetting great looking products utilising the latest modern technology in insulation.
You can also hold your head up high because you are choosing the most thermally efficient doors and windows available for your home which in turn is kind to the environment, your pocket and our planet.

As of 15th June 2022, the minimum U-values for windows and roof lights for existing dwellings has improved from 1.6 to 1.4 W/m²K and doors from 1.8 to 1.4 W/m²K. Additional to this, the notional standard (SAP10 Standard Assessment Procedure) suggests a lower U-value of 1.2 W/m²K, which may be an indication of standards to come. Both our new systems can achieve 1.03 W/m²K using triple glazed units and 1.37 W/m²K using double glazed units.

Through a combination of design improvements, five to be exact! Both our systems; Classic and Signature (inc. our current systems) include thermal insulation breaks within the profile, whereby cold (or heat) cannot transfer across from the inside to outside and vice versa (thermal bridging). Our two new systems have re-designed profiles [1] and utilise ‘Winsul8 Technology’ [2], which is our new Insulated core system. The new profile allows us to accommodate larger and additional thermal insulation breaks (Winsul8 Technology) both within the profiles and tracks themselves. We also changed the material of the thermal break from polyurethane to GFRC (Glass Fibre Reinforced Composite) material [3], which offers substantially better insulating properties, as well as strength. We also incorporate a thermal break on our glazing clips [4] as standard and offer the inclusion of foam filled frames [5] which can increase thermally efficiency by as much as 15%.

Both the Classic system and Signature system incorporate the same improvements; profile re-design and include ‘Winsul8 Technology’ our new Insulated core system, which make them very similar in that respect.
There are a few differences that set them apart; the Classic range uses our existing track options and is only available in aluminium in the 3 stock colour options (though you can spec up an order). It also has a 15mm (finger safe) gasket line between panels.
The Signature system includes our new improved thermally efficient track and is available in a huge choice of material options; Aluminium (Flush), Aluminium / Glass, Aluminium / Hardwood Timber, Glass / GlassIIEdge™ (flush),  Hardwood Timber / GlassIIEdge™ (flush), Hardwood Timber. You can specify any colour, RAL colour, finish and these come with the option to add a custom accent colour to the aluminium surround trim (inside / outside). This system has a 5mm gasket line between panels and built-in fitting tolerance.

Both systems offer the same product range; bi-fold doors, sliding doors, corner doors, french doors, bi-fold windows and flush casement windows. It’s only the material options that set them apart.

Thermal transmittance, also known as U-value, is the rate of transfer of heat through a structure (which can be a single material or a composite), divided by the difference in temperature across that structure.  The units of measurement are W/m²K.
W/m2K stands for Watts-per- meter-square-kelvin. The lower this value, the better a product is at insulating a building.

You can visit our Winsul8 web pages, call +44 (0) 345 64 64 646 (UK) / +1 786 275 5068 (USA) or email This email address is being protected from spambots. You need JavaScript enabled to view it.