Low U-value windows and doors for architects

For architects

PVC vertically sliding sash windows showing how they offer a visually appealing low maintenance, sustainable choice.

H Jarvis PVC casement windows which offer a highly sustainable choice in a U-value as low as 0.8 W/m2K.

Low U-value, energy efficient windows and doors which are available from H Jarvis to suit traditional and contemporary architecture.

Windows and doors to suit your SAP calculations
Combine low U-values with A, B and C Domestic Window Energy Ratings (DWERs)
Exceed expectations with the 0.8W/m²K ‘zero carbon’ performance
A range of products to give you design flexibility
Uncompromising aesthetics in all mainstream window and door styles

Delivering sustainable windows and doors

We understand the important role that the right specification windows and doors can make to the overall energy performance of the building envelope.

That’s why our product range has been developed to deliver a range of low U-value products that far exceed the requirements of Building Regulations Approved Document L.

You can choose windows in 0.1W/m²K increments from 1.8 W/m²K at the upper end down to the ground-breaking 0.8W/m²K level. Our composite and PVC entrance doors offer equally excellent energy efficiency standards with U-values down to 1.0 W/m²K.

This gives you the flexibility to choose a performance level which best suits your plans for other elements of the building envelope. And importantly our low U-value windows and doors can help you deliver cost effective ‘zero carbon’ homes and buildings without the need for expensive and often complicated renewable technologies.

Choice through styles and colours

We provide windows in all the mainstream styles – traditional casement, vertically sliding sash, tilt and turn and fully reversible, plus curtain and ribbon walling.

Modern and traditional architecture can be accommodated with ease thanks to our ability to deliver windows and doors in any colour. From contemporary grey window frames in urban apartment developments to cream foiled and woodgrain finishes to suit established British building styles, we have the solutions.

Our range of doors is equally diverse covering made to measure composite doors available in a wide range of bespoke styles, colours and designs. French doors, PVC entrance doors, Bi-fold and sliding doors are also available to perfectly complement our windows with matching energy efficiency performance.

An experienced and trusted supply chain partner

Our experience in the private housebuilding, social housing, schools and commercial markets ensures we can provide valuable technical support from the design concept stage right though to post completion.

We understand the need to deliver when it matters to ensure we work efficiently with architects and main contractors from day one. Our major housebulding customers include Bellway Homes, Miller Homes, Persimmon, Charles Church and Gladedale, major brands which depend on the right window and door suppliers.