Mon-Thurs: 9am-5pm / Fri: 9am-3pm
Compliant Window & Door Fitting
Fully Guaranteed and Insured
Designed to Fit your Needs
Got questions about paperwork, performance or planning? You’re not alone. This page gathers the most common queries we hear — from “what is a FENSA certificate?” to “are flush sash windows any good?” — with plain-English answers you can act on. If you don’t see your question covered, ask us and we’ll add it here for other homeowners.
A FENSA certificate is proof that your replacement windows/doors were installed by a competent installer and comply with Building Regulations (thermal performance, safety glazing, ventilation, and where applicable, egress). You’ll be asked for it when selling your home. After installation we register your project and the certificate is issued to you directly. Keep it with your house documents; if you ever misplace it, duplicates can be obtained.
Like-for-like replacements usually don’t need planning permission. You still must meet Building Regulations (U-values, safety glass, ventilation). If you’re changing window style on a conservation-sensitive street, adding a bay, or altering openings, planning or listed building consent may be required. We flag this at survey and help you take the right steps.
Trickle vents allow background ventilation without opening the sash. Whether you need them depends on the room’s ventilation strategy and current regs. Where vents are required, we specify discreet, colour-matched options that don’t spoil the sightlines.
Yes — are flush sash windows any good is a question we hear often, and the short answer is they offer the clean, timber-like look many streets demand with modern insulation and security. The sash sits level with the outer frame (no “lip”), creating slim, elegant lines. Choose quality multi-chamber frames, warm-edge double or triple glazing, and proper installation to get the full benefit: low U-values, quiet rooms and a premium façade.
With quality profiles and correct fitting, how long do uPVC windows last? Typically 20–30+ years. Lifespan depends on exposure (coastal areas weather faster), colour/foil choice, and maintenance (simple cleaning and light lubrication of hinges/locks). Good installation is crucial: poorly supported frames and weak seals age early.
Modern composites are very secure. Are composite doors secure enough for a front entrance? Yes — specified with multi-point locks, high-security cylinders (anti-snap, anti-pick, anti-drill) and laminated safety glass in any vision panels, they comfortably meet robust standards (PAS 24 options available). They also hold their shape in wet/cold weather, so locks keep aligning.
Double glazing (A-rated) satisfies most homes for warmth and condensation control. Triple glazing can help on busy roads (noise) or exposed elevations (cold/windy). Many customers choose a hybrid: triple to the front bedrooms, high-spec double elsewhere for best value.
For replacement windows, expect low U-values that meet or beat current standards when paired with low-E coatings, argon gas fill and warm-edge spacers. Remember: airtight installation at the perimeter is just as important as glass spec.
Not with modern compression seals, quality glazing and correct fitting. We calibrate locks and meeting stiles so doors close with firm, even pressure — the secret to winter comfort.
Often, yes — but it needs sensitivity. Can you have double glazing in conservation areas depends on the street and council. We typically specify flush sash or slim-sightline systems with wood-effect foils and authentic glazing bars that respect the original look. In listed buildings, secondary glazing may be the route; we’ll advise case by case.
Not if the design is handled carefully. Flush lines, correct bar patterns, heritage colours (e.g., Creams, Greys, Greens) and neat seals make modern frames sit comfortably on older façades while quietly improving comfort.
A three-bed house of windows typically takes 1–3 days, depending on access, bays and any making-good. Doors with side panels can be a same-day job; large sliders/bi-folds need longer for calibration and finishing. We confirm timelines after survey.
We protect floors and furnishings, remove old frames and glass carefully, and tidy daily. Waste leaves with us. You’ll see steady progress room by room.
Little. Clean frames and glass with a mild solution; keep drainage slots clear; lightly oil hinges and locks once or twice a year. If handle force increases, call us — small adjustments prevent wear.
Yes. Hinges, handles, gearboxes and misted double-glazed units are all replaceable. If a cost-effective window repairs or door repair will restore performance, we’ll recommend it first.
That’s a failed perimeter seal. The remedy is a new double-glazed unit (we match coatings, spacer thickness and any privacy/acoustic spec). Replacing just the glass restores clarity and warmth without changing the frame.
Three things working together:
For front doors, low-level panes and vulnerable windows, yes. Laminated glass stays together if broken and resists forced entry better than standard toughened alone. It also improves acoustics modestly.
No — they provide background ventilation and are too small to be a security concern. We specify neat, secure designs colour-matched to your frames.
Spec and method. Frame system, glazing (low-E, laminate, acoustic), colour foils, hardware, and installation standards (packers, fixings, air-seals) all change performance and price. We provide itemised quotes so you can see where every pound goes.
Yes. Options include interest-free promotions (when available), low fixed monthly payments and Buy Now Pay Later. We’ll show finance side by side with the cash price so you can compare easily.
Typically, yes — sized to suit your project and finance choice. Everything is documented clearly before you commit.
Absolutely. We’ll design the whole house now so phase-by-phase installations match perfectly later.
uPVC: excellent value, strong thermal performance, wide colour/wood-effect choices. Aluminium: slimmer sightlines, superb rigidity for big panes/bi-folds, thermally broken frames for efficiency. Many homes mix both: uPVC for most windows, aluminium for sliders/bi-folds.
Warm-edge spacers replace the old metallic spacer at the glass edge, reducing heat loss and edge condensation risk. They’re a small component that makes a noticeable comfort difference.
Yes, when used where noise is worst and combined with airtight installation. Asymmetric or laminated units target road noise frequencies better than standard double glazing.
Yes — continuous or discreet soffit vents help keep the loft dry. We also fit eaves protection trays so water runs into the gutter, not onto timber edges.
Many small porches fall under permitted development if they meet size/location limits. We’ll advise before design and confirm if simple approvals are needed.
If you tick those off, choosing the right specification becomes straightforward.
Whether it’s paperwork, performance or planning, send your questions and a couple of photos and we’ll respond with practical guidance you can use. Prefer to speak to a person? Call 0800 233 5576 and one of the team will help.
Sureseal are at the forefront of sustainable home improvements. We believe in using environmentally friendly materials and working practices while manufacturing the most thermally efficient products on the market.
Woodland Farm, Tir Syr Walter, Ammanford, SA18 1JW.
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
9am – 5pm
9am – 5pm
9am – 5pm
9am – 5pm
9am – 3pm
Closed
Closed
Copyright © 2025 All Rights Reserved. | Immersive Media Web Design
Credit is subject to status and affordability. Sureseal Windows Limited, Woodland Farm, Tir Syr Walter, Ammanford, SA18 1JW, FCA Register no. 764026 trading as Sureseal Windows is a credit broker, not the lender and is authorised and regulated by the Financial Conduct Authority. Credit is provided by a panel of lenders with whom we have a commercial relationship (so we cannot provide independent advice) | Registered in England and Wales No 10035258, VAT No GB296090869.
