Whenever a piece of legislation changes, there can be confusion and concern in the market about whether products are compliant.
The ending of the transitionary period for the changes to Part L of the Building Regulations in England is one such example.
Focused on thermal performance and energy efficiency, the amendments to Part L were introduced on 15 June 2022.
Timber door manufacturers were given a year of grace to develop their products to ensure that they met the new standards, reflecting the key influence that they have on the thermal performance of a home.
What do U need to know?
One of the pieces of terminology used when describing thermal performance is U-values. U-values are a measure of how effective the elements of a building’s fabric are at insulating the property.
As of 15 June 2023, doors fitted into existing dwellings must achieve 1.4 W/(m2.K) (more here).
As you would expect, here at Solidor, our range is fully in line with these standards. To us, this change represents nothing more than the normal cycle of improvement that any industry that wants to offer the best solutions to its customers should be doing.
A changing landscape
Of course, when looking at any product, there’s more to it than adhering to one piece of legislation or guidance. In this world of complex legislative change, with many standards being updated on a regular basis, installers must tread carefully to avoid risk.
Unfortunately, it’s not something that the wider composite door industry has always done successfully, as highlighted in Paul Morrell’s recently published Independent Review of the Construction Product Testing Regime. When it comes to accurately describing performance and achieving compliance, there have been issues. It’s why we have seen changes such as the Building Safety Act and the Code for Construction Product Information introduced, in an effort to improve oversight and clarify key points of legislation
And it is why installers need to be careful what they buy and where they buy from. Trust is essential.
Opportunity knocks
Dealing with regulatory change is business as usual for us. With this change, we could have used it to develop a completely new range or moved away from our timber core. Instead, we have taken an approach that is sensitive to the performance, aesthetics and environmental impact of the product.
Maintaining the timber core offers a range of benefits. As a natural material, it is more sustainable because it captures carbon and can be recycled. It also results in a thermally efficient, durable, and more secure door. Using our design and engineering skills, built over decades working in the sector, we’ve ensured that we’ve kept the best of the product while adding design features that drive an overall improvement. All this development is underpinned by extensive research and testing, to provide the level of assurance that our customers need and expect.
As leaders in this industry, we believe that we are responsible for setting an example. It’s quite simple – do things properly and thoroughly and we will mitigate risk. No compromises in quality or performance, and a recognition of our part in creating positive outcomes for end users and a long-term sustainable future for the industry and the planet.
That is why we never stand still. We continually invest sizeable sums and resources towards developing and improving our product portfolio.
Your role as an installer
If you are recommending products to your clients, you are responsible for ensuring that they are fit for purpose and the intended use. And, while many end users are more informed about performance and compliance requirements, the onus is on industry to take the lead.
So, you need to be working with a manufacturer you can trust. That’s what we are, with independently verified test data and certification to cover our products. This third-party testing looks at everything from a safety, security and performance perspective, so you can be completely clear on how the door will perform.
With a long track record of investing in skills, product development and facilities, we’re always here to support our customers through these changes.
U-Values Explained
You might think that the subject of U-Values isn’t all that interesting. However, understanding this measurement of thermal performance can help to ensure that you’re getting the best insulation and efficiency for your home. After all, energy is not getting any cheaper.
The design, construction and materials used in composite doors vary from manufacturer to manufacturer and so there are many options available to you the consumer. Finding out the thermal efficiency of the doors you’re interested in could help you in the decision making process.
First things first…. How is the thermal efficiency of a door measured?
This part’s a bit technical but a U-value is calculated by measuring the amount of watts per metre kelvin (a kelvin is the unit of temperature measurement in the physical sciences).
To put this in simple terms, a U-value shows the rate and amount of heat that passes through a door. It is calculated by including the combined thermal resistance of all elements within the door, including the glass, frame, air spaces, gaps and fixings – such as the hinges.
Ultimately, when buying a door what you need to know is that the lower the U-value number the better the thermal performance of the door. And a more thermally efficient door means the less costly energy you lose from your home.
UK Building Regulations
Current building regulations state that all doors including glass and the frame must achieve a U-value of 1.8 W/m² or less to comply.
Solidor with its timber core sits well within this regulation with a maximum U-Value of 1.5 W/m². This rating can be further enhanced by opting to have laminated glass within your door as this additional element increases thermal efficiency as well acting as an enhanced security feature.