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1. Survey & measure
We check the bead type, rebates, vents and edge depth, then capture an accurate manufacture size for your new sealed unit.
Misted double glazing unit replacement
Failed sealed units can look cloudy between the panes — we replace glass where the frame remains sound so you regain clarity without replacing the full window wherever that is sensible. Send photos ahead on WhatsApp so we can advise before survey.
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Sealed units, measured and fitted
Misted glazing usually means moisture has breached the insulating seal inside the sealed unit — it does not always mean you need new frames. Where the sash, frame beads and hardware are in good shape, we remove the faulty unit and install a replacement made to the opening across Newport, Cardiff, Cwmbran, Caerphilly, Chepstow and South Wales.
How we replace a misted unit
A straightforward path from enquiry to glazed window — survey first, manufacture to size, then fit on site with tidy working practices.
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2. Order to specification
New units are manufactured with the right spacer, cavities and glazing options — including obscure, laminated or Georgian bar patterns where matched from your existing glazing.
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3. Glass matched to purpose
Bathrooms and overlooked elevations often need privacy glass; entrances may need laminated or tougher specifications — we advise room by room.
4. Install & finish
We glaze safely into the existing bead or compatible system, reseat vents where required and leave trims and workings tidy ready for everyday use.
Why replace the unit alone?
When diagnosis shows the frame remains sound and weather-sealed well enough, renewing just the insulating glass restores appearance and thermal performance without the disruption of full frames.
Often less than full frame replacement
You pay for the manufacturing and glazing labour suited to glass replacement rather than stripping out complete windows when that is unnecessary.
Clear view again
Moisture and bloom between panes disappears with a virgin sealed cavity so rooms look brighter through the same frames you already lived with.
Less mess and disturbance
Often there is reduced internal trim work compared with full removals because we work within compatible bead systems on sound profiles.
Honest escalation
If we find degraded profiles, rotten timber or faults that undermine the seal long term, we will say so plainly and quote replacement windows or broader repairs instead.
Glass we can replicate on new units
Replacement IGUs do not only come in plain float — decorative and privacy glazing is frequently matched depending on manufacture lead times and glazing tolerances assessed at survey.
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Georgian bars & grilles
Maintaining a lattice or bar layout across your elevation helps preserve kerb appeal when only some units have misted.
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Leaded & decorative
Diamond-lead aesthetics and patterned features can carry through on replacements where technically suitable.
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Obscure grades
Select the right diffusion for bathrooms and side elevations while daylight still washes in.
Double and triple-glazed replacements
Double glazing remains the usual replacement standard for insulating performance. Triple units are quoted where aperture depth and frame compatibility support the extra lite without compromising hinge or rebate operation.
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Double-glazed replacements
Two bonded panes enclosing a dehydrated cavity with spacer — the typical route back to insulating comfort after seal failure.
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Triple where it fits
Enhanced thermal stacking when rebates are deep enough; we confirm sizing and ventilation responsibilities at quotation.
Technical specification
Survey, glass & workmanship
Every enquiry is surveyed on site rather than guessed from photographs alone — photos accelerate triage yet manufacture sizes must be witnessed to avoid rejects on site.
To the opening
Widths, heights and depth constraints taken from rebate and bead layouts so replacements seat squarely inside your existing sash.
Laminate & toughened
Low-level, door-side and vulnerable locations quoted for appropriate safety glass classifications where regulation or insurer guidance dictates.
Background airflow
Required trickle vent positions or substitutes noted so room ventilation duty is not degraded after reglaze.
Clear documentation
Written quotations itemising scope, exclusions and timelines before you approve — manufacturer guarantees as confirmed at quotation stage.
Misted units FAQs
Do I need new windows if the glass is misted?
Often no. If the frame and hardware are sound, we replace only the sealed glass unit. That is usually cheaper and quicker than a full window replacement.
How long does misted unit replacement take?
We measure on survey, order the unit to size, then fit when it arrives. Many jobs need two visits; we give you a clear timeframe at quote.
Can you match obscure or patterned glass?
Yes. During the survey we note the glass type — clear, obscure, patterned or Georgian bars — so the replacement fits with the rest of your windows where practical.
Is a photo on WhatsApp enough for a quote?
Photos help us give guide pricing and say whether unit-only replacement is likely, but final pricing follows an on-site measure. Send several angles showing bead line and opening type.
What if my frame is not suitable?
If the profile is degraded or leaking structurally we will quote honestly — sometimes full replacement windows are the smarter long-term option.
Do you cover my area?
We work across South Wales, typically within 25 miles of our Newport base. Use the quote form with your postcode or call 01554 701200 to confirm.
Book a misted unit survey
A photo on WhatsApp often helps us advise before we visit. Clear quote; no hard sell — we aim to respond within 24 hours.