Understanding FENSA — and Why It Matters

Windows are one of the most impactful upgrades you can make to your home — they affect kerb appeal, energy efficiency, security and natural light all at once. But with uPVC, aluminium, timber and sliding sash options all available, how do you choose?

Start with your home's character. Period properties — Victorian terraces, Edwardian semis, traditional cottages — tend to suit timber or sliding sash windows that respect the original architecture. Modern new-builds and contemporary extensions are well-matched to slim-profile aluminium frames, which offer large glass areas and a clean, minimal look.

uPVC remains the most popular choice for good reason: it's low-maintenance, thermally efficient, and available in a wide range of colours and finishes including realistic woodgrain effects. It suits the majority of UK homes and offers excellent value.

Think about energy performance. Look for windows with an A or A+ Window Energy Rating (WER). Double glazing is standard; triple glazing is worth considering for north-facing rooms or properties in exposed locations. A good U-value (the lower the better) indicates less heat loss.

Finally, consider security. All our windows are supplied with multi-point locking systems as standard and meet the requirements of Secured by Design where specified. If you're in an area with higher crime rates, ask about laminated glass and enhanced locking options.

When it comes to replacing your front or back door, composite and uPVC are the two most common options. Both offer good security and thermal performance, but there are meaningful differences in appearance, durability and cost.

uPVC doors are lightweight, affordable and very low-maintenance. They come in a good range of styles and colours, and modern uPVC doors offer solid security with multi-point locking. They're a practical, cost-effective choice for most homes.

Composite doors are constructed from multiple materials — typically a solid timber core wrapped in glass-reinforced plastic (GRP) — giving them a much more substantial feel. They're heavier, more rigid, and generally considered more premium in appearance. The GRP outer skin can be moulded to look convincingly like painted timber, making them popular for traditional-style homes.

In terms of security, composite doors typically score higher due to their solid core construction. They're also more resistant to warping, bowing and discolouration over time. If kerb appeal and longevity are priorities, composite is usually the better investment.

Budget is often the deciding factor. uPVC doors are typically 20–30% less expensive than composite equivalents. If you're replacing a rear or side door where appearance is less critical, uPVC makes excellent sense. For a front door that makes a statement, composite is hard to beat.

Both conservatories and orangeries add living space to your home and connect the interior to the garden, but they differ significantly in construction, feel and cost.

A traditional conservatory has a predominantly glass structure — glass walls and a glass or polycarbonate roof. They're lighter, airier and less expensive to build, but can suffer from temperature extremes: too hot in summer, too cold in winter unless you invest in a solid or tiled roof upgrade.

An orangery has more in common with a conventional extension. It features solid brick or rendered walls with large windows, and a flat or lantern roof with a central glazed section. The result is a room that feels more like part of the house — better insulated, more usable year-round, and generally more impressive in appearance.

Planning permission is worth checking for both. Most conservatories and orangeries fall under permitted development rights, but there are size and height restrictions, and properties in conservation areas or listed buildings may need formal consent. We always advise checking with your local planning authority before proceeding.

If you want a bright, garden-facing room at a lower cost, a conservatory with a solid roof upgrade is a great option. If you're looking for a premium, year-round living space that adds significant value to your home, an orangery is worth the additional investment.

A draughty, poorly insulated home can add hundreds of pounds to your annual energy bills. The good news is that many of the most effective improvements are straightforward and pay for themselves relatively quickly.

Start with your windows and doors. Single-glazed windows lose heat rapidly; upgrading to A-rated double glazing can reduce heat loss through windows by up to 50%. If you already have double glazing but notice condensation between the panes, the sealed unit has failed and needs replacing — this is a relatively inexpensive fix that restores thermal performance.

Check your door seals and letterbox. Draught-proofing strips around door frames are inexpensive and easy to fit. Composite and modern uPVC doors have compression seals built in, but older doors may have deteriorated seals that are worth replacing.

Loft insulation is one of the most cost-effective improvements you can make. Around 25% of heat is lost through the roof in an uninsulated home. The recommended depth for mineral wool insulation is 270mm. If your loft is already insulated but the layer is thin, topping it up is straightforward and inexpensive.

Don't overlook your conservatory if you have one. An uninsulated polycarbonate roof can make a conservatory unusable in winter. Upgrading to a solid tiled roof or a high-performance glass roof system dramatically improves thermal comfort and can make the space usable year-round.

Bi-fold doors — also called folding sliding doors — consist of multiple panels that fold back on themselves and stack neatly to one or both sides of the opening. When fully open, they create a seamless connection between inside and outside, flooding the room with light and making the garden feel like an extension of your living space.

Aluminium is the most popular material for bi-fold doors, and for good reason. Its strength-to-weight ratio allows for slim sightlines — the thin frames that maximise the glass area — while remaining structurally rigid. Aluminium bi-folds are available in any RAL colour and are virtually maintenance-free.

Sizing is flexible. Bi-fold doors can span openings from around 1.8m up to 6m or more, with panel counts typically ranging from two to seven. The more panels, the wider the opening you can achieve. For most rear extensions and kitchen-diners, a three or four-panel configuration works well.

Glazing specification matters for thermal performance. Look for double or triple glazing with a low-emissivity (low-e) coating and argon gas fill. A good U-value for the overall door unit is 1.4 W/m²K or below. All our bi-fold doors meet or exceed current building regulations for thermal performance.

Installation typically takes one to two days for a standard opening. The structural opening must be correctly formed with an adequate lintel before the door frame is fitted. We handle the full process — from survey and structural assessment through to fitting and sign-off — so you don't need to coordinate multiple trades.