Not every window, door or conservatory problem means you need a full replacement. Misted glass, a stiff handle, a dropped door, a leaking conservatory roof or a draughty frame can usually be repaired quickly and affordably — extending the life of what you already have by years, without the cost of replacing it. St Austell Bay Windows & Plastics offers a full repair service across St Austell and all of Cornwall — covering uPVC and aluminium windows, composite and uPVC doors, bi-folding doors and conservatory roofs, including polycarbonate, glass and tiled warm roofs. Whether it's a single misted pane, a broken handle, a door that's dropped on its hinges or a conservatory roof that's started leaking, our experienced in-house team will diagnose the issue and give you an honest recommendation — repair where possible, and only suggest replacement where it genuinely makes sense. We also repair windows, doors and conservatories we didn't originally install, so whoever fitted yours, our team can help.
Foggy or misted glass between the panes means the seal on your double glazed unit has failed, allowing moisture in and reducing the insulating performance of the window. We also fix draughty frames, stiff handles and worn hinges. In most cases we can replace just the glazed unit or faulty hardware within your existing frame — restoring clarity, security and thermal efficiency without the cost of a full window replacement.
If your door has started dragging on the floor, is difficult to open or close, or you've noticed uneven gaps around the frame, it has likely dropped slightly on its hinges — a common issue as uPVC and composite doors settle over time. We repair and adjust hinges, replace handles and multi-point locking mechanisms, and fix sticking or misaligned doors, restoring smooth and secure operation, often within a single visit.
Leaking conservatory roofs almost always start at one of three points — the ridge bar, the lead flashing where the roof meets the house, or the gutters and eaves. We diagnose and repair leaks at each of these points, including reseating slipped polycarbonate or glass panels, replacing damaged seals and gaskets, and repairing or replacing flashing. Where a roof has reached the end of its life — typically 10-15 years for polycarbonate — we'll advise honestly on whether a repair is worthwhile or a SupaLite warm roof upgrade offers better long-term value.
A draughty window or door is usually down to a worn or perished weatherseal rather than a problem with the frame itself. We replace weatherseals and gaskets on uPVC and aluminium windows and doors to restore a snug, draught-free fit — improving comfort and reducing heat loss without the need for a full replacement.
Yes. We repair uPVC, composite and aluminium windows and doors, and conservatory roofs of any type, regardless of who originally installed them. Our team will assess the issue, advise honestly on whether a repair or replacement makes more sense, and provide a clear quote before any work begins.
As a general rule, issues like misted glass, stiff handles, worn seals or a dropped door can usually be repaired cost-effectively. If the frame itself is cracked, warped or the window is more than 20-25 years old with multiple failing components, replacement is often the better long-term value. We'll give you an honest recommendation either way during a free assessment.
In many cases, yes. Most conservatory roof leaks come from slipped panels, perished seals or damaged flashing, and these can usually be repaired for a fraction of the cost of a full roof replacement. If your roof is older than 15 years — particularly polycarbonate — or you've had repeated leaks in different areas, a SupaLite warm roof replacement is often better long-term value than chasing individual repairs. We'll assess your roof and give you an honest recommendation.
Repair costs vary depending on the issue — a hinge adjustment or handle replacement is typically far less than a glazed unit replacement or a conservatory roof repair. We provide a clear, upfront quote before any work begins, so you know exactly what you're paying for with no hidden costs.
Why Choose Us
Honest Advice — Repair Where Possible
We won't push you towards a replacement if a repair will do the job. Our team will give you an honest assessment and the most cost-effective recommendation for your windows, doors and conservatory roof, every time.
We Repair Any Make — Not Just Our Own Installations
Whether we fitted your windows, doors or conservatory or another company did, our team can diagnose and repair uPVC, composite and aluminium products, and conservatory roofs of any type, across St Austell and all of Cornwall.
In-House Team — No Sub-Contractors
Every repair is carried out by our own experienced, employed engineers — never sub-contracted out. That means consistent quality and full accountability on every visit.
Clear, Upfront Pricing
We provide a clear quote before any work begins, so you know exactly what you're paying for with no hidden call-out charges or surprise costs.
Step 1 - Free Home Survey
Step 2 - Your Personal Quote
Step 3 - Products Are Manufactured
Step 4 - Professional Installation
St. Austell Bay Business Park, Par Moor Rd, Saint Austell PL25 3RF
Open from 9am to 11pm
Call us @
01726 816906
Send us an email
staustellbayplastics@rocketmail.com
