Re-Seal Doors
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Worn, damaged or poorly fitted seals can allow unwanted draughts and moisture around an external door, making the surrounding area less comfortable and reducing the effectiveness of the door’s weather protection.
Window Doctor provides professional door re-sealing and draught-proofing through our nationwide network of local branches, helping homeowners, landlords and businesses improve the performance of existing uPVC, aluminium and timber doors.
Our experienced engineers can inspect the seals around your door, identify where gaps or deterioration have developed and recommend the appropriate repair. Depending on the problem, this may involve replacing weatherstrips, rubber seals, draught excluders, brush seals, letterbox seals or external sealant around the door and frame.
From £24/meter
Common Reasons To Re-Seal Doors:
Door seals don’t last indefinitely. Regular use, changing temperatures, sunlight, moisture and general ageing can gradually cause sealing materials to harden, shrink, crack or lose their flexibility.
Common reasons for re-sealing a door include:
- Cracked or torn seals – damaged sealing material may no longer provide consistent contact around the door.
- Brittle or hardened seals – older seals can lose their flexibility and become less effective.
- Flattened or compressed seals – seals that no longer spring back into shape may struggle to close gaps effectively.
- Poorly installed weatherstrips – incorrectly positioned sealing products may leave gaps around sections of the door.
- Seals no longer making proper contact – movement or deterioration can prevent the door from meeting the seals consistently.
- Draughts around the door – unwanted air movement can indicate gaps in the existing weather sealing.
- Failed mastic or silicone – deteriorated sealant around the frame can allow gaps to develop between the door frame and surrounding structure.
- Worn letterbox seals – ageing brushes or seals around a letterbox can become a noticeable source of draughts.
- Missing or damaged brush seals – suitable sliding and other door systems may rely on brush seals to reduce gaps.
- General deterioration – several small areas of ageing sealant can combine to noticeably affect the performance of the door.
Not every draught is caused by failed seals. If the door has dropped or moved out of alignment, replacing the seals alone may not solve the underlying problem. Our engineers can assess how the complete door is closing before recommending unnecessary replacement components.
Our Door Re-Sealing & Draught-Proofing Services:
Window Doctor provides re-sealing and draught-proofing solutions for suitable uPVC, aluminium and timber doors in residential and commercial properties.
Depending on the door and the source of the problem, our services can include:
Replacing damaged or worn door seals and gaskets Installing or replacing draught-proofing foam Weatherstrip replacement Installing or replacing suitable draught excluders Replacing letterbox seals Replacing failed mastic and silicone seals Installing or replacing door brush seals Resealing suitable gaps around door frames Assessing door alignment where seals aren’t making correct contact Residential and commercial door re-sealing
The appropriate solution depends on where the unwanted gap has developed. Simply adding more sealing material isn’t always the answer; seals need to be suitable for the particular door and make appropriate contact when the door is closed. It’s also important to distinguish unwanted draughts from intentional ventilation. Purpose-designed ventilation shouldn’t simply be blocked or sealed as part of draught-proofing work.
Where the problem specifically involves deteriorated rubber gaskets, our rubber seal replacement service provides more targeted replacement of these components. If the seals themselves are in reasonable condition but the door doesn’t close against them correctly, our draughty door repair service can investigate other causes such as alignment, hinges and locking components.
If you’ve noticed cold draughts, deteriorated seals or gaps developing around your doors, contact Window Doctor to arrange an assessment. Through our nationwide network of local branches, an experienced Window Doctor engineer can inspect your door, establish where the problem is occurring and advise on the most appropriate re-sealing or draught-proofing solution.
Contact Window Doctor today to arrange your assessment and receive a free, no-obligation quote for your door re-sealing work.
Frequently Asked Questions - FAQs
How do I know if my door seals need replacing?
Signs include visible cracks or tears, brittle or hardened sealing material, flattened seals that no longer return to shape and noticeable gaps or draughts around the closed door. An engineer can also check whether the problem is actually being caused by the seals or by poor door alignment.
Will re-sealing my door stop draughts?
It can if deteriorated or poorly fitted seals are responsible for the draught. However, unwanted air can also enter because a door has dropped, moved out of alignment or developed gaps elsewhere around the frame. Identifying the source of the draught first is therefore important.
What parts of a door can be re-sealed?
Depending on the door system, re-sealing can involve rubber gaskets, weatherstrips, draught-proofing foam, brush seals, letterbox seals and mastic or silicone around suitable areas of the door frame.
Do you re-seal uPVC, aluminium and wooden doors?
Yes. Window Doctor provides suitable re-sealing and draught-proofing work for uPVC, aluminium and timber doors. The products and techniques required will depend on the particular door construction and existing sealing system.
How long do door seals last?
There isn't a single replacement interval that applies to every door. Lifespan depends on the seal material, installation, exposure to weather, frequency of use and maintenance. Rather than replacing seals according to age alone, it's better to look for deterioration such as cracking, brittleness, compression or loss of flexibility.
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- 1 Year Warranty on Labour
- 1 Year Warranty on Manufactured Parts
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