Surrey · England
Window & door mastic in Dockenfield, Surrey
Our applicators work in Dockenfield on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Cold air getting in at the frame edge
- A bead that doesn’t match the frame
- Damp patches on the reveal after heavy rain
Do you need window mastic in Dockenfield?
On timber frames, paint and putty build up around the joint. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
It’s worth asking for a quote if you see:
- Old mastic that has gone black or come away
- Cracked or shrunken mastic around the frame
- Cracked internal joints between frame and plaster
- White mastic on grey or black frames
Rented homes near Bentley (Hampshire) station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Before you book anyone
- Whether they seal over old material or remove it
- How long the guarantee is
- When the joint can take water or movement
- Which sealant they’ll use, and why
Window mastic in Dockenfield, done properly
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. We work on timber windows & doors, composite doors and uPVC windows, and people most often call us about cracked sealant at the sill ends and cracked or shrunken mastic around the frame.
Mastic can only go onto a dry, clean joint, so window work in Dockenfield is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Location
- Dockenfield (GU10)
- Region
- Surrey
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
The process
We bring everything the job needs with us, so there’s nothing for you to buy. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a morning for a couple of windows and a door. In a small place like Dockenfield, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
- Let us know about earlier repairs to the joints
Getting a quote
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before any work starts.
Read more
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
What affects the cost of window mastic
Every job gets its own quote. These are the things that affect it:
- Whether old sealant or filler has to be cut out
- How many rooms, windows or areas are involved
- Working hours on commercial sites
- The size of the job
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will go through it with you.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or send us an email.
Questions from Dockenfield
Do you cover smaller places like Dockenfield?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
I let a flat near Bentley (Hampshire) station. Can you help?
Yes. We work for letting agents and landlords as well as householders, and several properties can be quoted together. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
What information do you need?
Tell us what needs doing and where. If we need more, we’ll ask.
Can you seal the gap between the frame and the plaster indoors?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We do one or both.
Where is Mr Mastic based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
How the job changes by surface
Composite doors
Draughts round the door leaf normally come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.
Patio & French doors
Door frames take knocks and movement every time the doors are used. The sealant must cope with it, where a rigid one would crack.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Keep paint off silicone joints
- Avoid blasting the frames with a pressure washer
- Keep timber frames painted
- Ventilate rooms so frames do not stay wet inside
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Towns and villages near Dockenfield
Other services in Dockenfield
Windows and doors in Dockenfield
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Farnham Castle (about 4.1 miles north) are a reminder that the area around Dockenfield has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
In the older streets around The Church Of The Good Shepherd, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Dockenfield is about 4 miles south of Farnham, in Surrey. Every kind of property in Dockenfield is covered for window mastic, old or new, large or small. The work is guaranteed for a year. We cover 395 towns and villages across Surrey. We also work in Reading, about 21 miles from Dockenfield.
Every address in GU10 is covered for window mastic, from the main roads to the quietest streets. Local streets include The Street and Lake Lane. Other places close to Dockenfield include Batt's Corner (1 mile north-west), Frithend (1 mile west), Wishanger Common (1 mile south-east), Bucks Horn Oak (1 mile north-west) and Rowledge (2 miles north). Further out, we also cover Guildford (12 miles north-east), Woking (15 miles north-east), Camberley (13 miles north), Farnham (4 miles north), Frimley (11 miles north) and Haslemere (7 miles south-east).
Local landmarks in Dockenfield
The closest station to Dockenfield is Bentley (Hampshire) station, roughly 2.4 miles north-west. Other landmarks nearby include Powderham Castle (4 miles north) and Chase Community Hospital (4.1 miles south-west). Green spaces nearby include Farnham Heath.