News

09
Nov

Part L Compliant Windows & Doors

At Aspect Windows we have a range of windows and doors available which are Part L compliant for both new builds and renovations.

To make it easier for you, we have included a select list below of our architectural glazing Part L compliant windows and doors.

Sliding Doors

20 mm slim sliding door

Ultraline Slim Sliding Door

Reynaers CP130 LS HI

U-value U-value
As low as 1.22 w/m2K double glazed As low as 1.55 w/m2K double glazed
or 1.2 w/m2K triple glazed
[Door Energy Rating = C]

Masterpatio

U-value
As low as 1.39 w/m2K double glazed or 0.8 /m2K triple glazed
[Door Energy Rating = B]

Bi-folding doors

OB-49 Slim Sliding Door

Origin OB-49

Origin OB-72

U-value U-value
As low as 1.4 w/m2K double glazed
or 1.1 w/m2K triple glazed
[Door Energy Rating = B]
As low as 1.4 w/m2K double glazed
or 1.1 w/m2K triple glazed
[Door Energy Rating = B]

Solarlux Highline

Solarlux Ecoline

U-value U-value
As low as 1.4 w/m2K double glazed
or 0.88 w/m2K triple glazed
As low as 1.6 w/m2K double glazed
or 1.17 w/m2K triple glazed

Aluminium Windows

AluK 58BW ST HI

AluK 58BW ST Flush HI

U-value U-value
As low as 1.4 w/m2K double glazed
or 1.1 w/m2K triple glazed
[Window Energy Rating = A – B]
As low as 1.4 w/m2K double glazed
or 1.0 w/m2K triple glazed
[Window Energy Rating = A – B]

AluK C70S HI (Open In & Out)

Reynaers SL 38 HI (Open In)

U-value U-value
As low as 1.3 w/m2K double glazed
or 1.1 w/m2K triple glazed
[Window Energy rating = A]
As low as 1.4 w/m2K double glazed
[Window Energy Rating = B]
SL 68 Reynaers Window Detail Origin Aluminium Windows

Reynaers SL 68 HI

Origin OW-80

U-value U-value
As low as 1.5 w/m2K double glazed
or 1.1 w/m2K triple glazed
[Window Energy Rating = A]
As low as 1.2 w/m2K double glazed with Aerogel
(1.4 w/m2K double glazed without Aerogel)
or 0.8 w/m2K triple glazed with Aerogel
[Window Energy Rating A]
Reynaers CS77 Aluminium Window

Reynaers CS 77 TBT HI

AluK 58 BW TBT HI

U-value U-value
As low as 1.41 w/m2K double glazed
or 1.2 w/m2K triple glazed
[Window Energy Rating = B]
As low as 1.4 w/m2K double glazed
or 1.2 w/m2K triple glazed
[Window Energy Rating = B – C]

Entrance Doors

RK Door Entre Range

RK ‘Excellence’ Premium Door

RK Pivot Door

U-value U-value
As low as 0.67 w/m2K As low as 0.72 w/m2K

Origin Residential Door

U-value
As low as 1.4 w/m2K

Roof Lights

Lantern rooflight aerial view

Slim Roof Lantern

Flat Rooflight

U-value U-value
As low as 0.8 w/m2K As low as 0.5 w/m2K triple glazed

Composite Windows and Doors

PVCu/Aluminium

Internorm KF 520

Internorm KF 510

U-value U-value
As low as 0.63 w/m2K As low as 0.63 w/m2K

Internorm KF 410

Internorm KF 310

U-value U-value
As low as 0.62 w/m2K As low as 0.69 w/m2K

Internorm KV 440 with integrated blind

Internorm KF 350 with integrated blind

U-value U-value
As low as 0.64 w/m2K As low as 0.79 w/m2K

Internorm KS 430 Lift & Slide Door

U-value
As low as 0.64 w/m2K

Timber/Aluminium

Internorm HF 510

Internorm HF 410

U-value U-value
As low as 0.65 w/m2K As low as 0.65 w/m2K

Internorm HV 450 with integrated blind

Internorm HX 300 Panorama Window

U-value U-value
As low as 0.62 w/m2K As low as 0.74 w/m2K

Internorm HS 330 Lift & Slide Door

U-value
As low as 0.73 w/m2K

The above range of windows and doors are compliant for both new builds / extensions and existing dwellings using the limiting values.

The notional values are also achievable for new builds. Please let us know whether you require your calculations to be based on the notional value or the limiting value.

Give the team a call on 01392 444233 or email sales@aspect-windows.com to discuss your next project. Or book a showroom appointment to experience and compare all of our architectural glazing solutions.


Part L Regulations

New Build / Extensions to Existing Dwellings

Notional Values – these are used to calculate the Target Emission Rate of a particular building. Once this is calculated, elements of the building can be offset providing the overall Target Emission Rate is met.

The Limiting Values – are the maximum possible u values for each element of the build


Existing Dwellings

WER = Window Energy Rating | DSER = Door Set Energy Rating

Download our guide to learn more about the U-value requirements for your windows and doors following the update to Document L of the latest building regulations. Or take a look at our frequently asked questions.

Please note:

    • The above u-value calculations are based on the GGF approved standard sizes and configurations or the GGF approved exetended sizes and configurations for windows and doors.
    • We will always quote to the most competitive standard unless otherwise explicitly advised.

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"Just a quick note of thanks to the whole team for our fab windows and doors, we are delighted with both the product and also with the whole fitting process. The lads were brilliant (it's not often you get trades in the house who leave it cleaner at the end of the day than when they arrive in the morning!!) and just quietly got on with the job. Thank you again"

Mr & Mrs Leonard, Exeter

"The pocket sliding door and gable look amazing, it’s an impressive bit of kit and it’s a revelation to be able to open the space up! I have to say we’ve been very impressed with all your teams positivity, professionalism and workmanship, from start to finish - so a big thank you…"

Mr Marsh, Exeter

"I would like to thank you for the quality of the service we have received from Aspect Windows and commend you for the care and attention that we have received throughout the process. I am thoroughly pleased with our new windows and would recommend your services to anybody who asks."

Mr & Mrs Miller, Exmouth

"I wanted to just send my thanks and appreciation. We had an install approx. 6 years ago including some bi-fold doors which in recent weeks appeared to have dropped and became very difficult to lock. I called the office on Monday and a lady took my details and quickly called me back suggesting you had an engineer locally the following day. He arrived and was extremely polite and efficient and diagnosed a broken hinge. He went back to the depot collected the replacement part, then returned to Budleigh and completed the repair. We really appreciate the speed and efficiency with which you dealt with the issue and the ease from a customer perspective. "

Mr Ashby, Budleigh Salterton

"I just wanted to say thank you for the excellent service you have provided in the planning, removal & installation of our beautiful new windows and doors. We were completely amazed & delighted at the speed of which the installation took place and the hard work put in by the installation team. They worked very efficiently and communicated with me at ease through the week so I knew their plans with each room for installation. All the windows & door look great and we have already had lots of compliments. "

Mrs Oakes-Ash, Exmouth

"We would like to thank everyone at Aspect Windows for the fantastic service that we have received on our project. From start to finish, you have been so professional and we are totally thrilled with our sliding doors and our side door. We would not hesitate to recommend you to anyone thinking of undergoing a similar project."

Mrs Moores, Templecombe

"We would just like to say how excellent the service has been from Aspect Windows from beginning to end. The salesman could not have been more helpful, we felt completely unhurried and un-pressured. The fitter was also extremely good, he was neat, careful and very respectful of our property as well as being very sociable and polite. Congratulations Aspect Windows on a really good job I wish everything in life could be so straightforward!"

Mr Foster, Exeter

"I had chosen Aspect Windows in Exeter to supply the glazing as they had a good reputation and specialised in aluminium doors windows and curtain walling. Aspect were brilliant throughout the design and fitting process, working to incredibly tight tolerances especially on the curtain walling."

Mr Abdilla, Exeter