Surrey · England
Window Mastic in Fernhurst
Mastic around window and door frames, sills and patio doors for Fernhurst, backed by a 12-month guarantee. Ask us for a quote.
- Gaps left after new windows were fitted
- Draughts coming in around windows and doors
- A bead that doesn’t match the frame
Window mastic for homes and businesses in Fernhurst
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through. Where the air is getting in through the window itself, we’ll say so. We are often asked to deal with old mastic that has gone black or come away and rushed sealant from a window installation, across composite doors, patio & French doors and aluminium frames.
Outdoor sealant needs dry, clean surfaces, so work on frames around Fernhurst is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Each job carries a 12-month guarantee, large or small.
- Place
- Fernhurst (GU27)
- Wider area
- Surrey
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for window mastic
Jobs vary more than people expect. What affects the quote:
- How easy the joints are to reach
- How many areas need sealing
- Any mould that needs treating
- Working hours on commercial sites
Combining jobs into one visit normally makes better use of the time than several visits. We will give you a clear quote for the lot.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Where the property is
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, call 0345 464 0079 or email us.
When it isn’t the sealant
Sealant isn’t the answer to every problem, and we’ll tell you before work begins. Sealant will not put right:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Worn gaskets, brush seals or a door that has dropped
- Rotten timber, which needs a joiner first
If in doubt, ring 0345 464 0079 or email us and we will say what we think before booking.
What we seal
- Composite doors
- Window sills
- Patio & French doors
- Aluminium frames
- Timber windows & doors
- uPVC windows
What the job involves on each surface
Composite doors
A composite door generally sits in a plastic outer frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A neat, narrow bead in a colour to match suits the frame.
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere like Fernhurst needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know about earlier repairs to the joints
- Let us know if you’ve seen damp or leaks
Get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.
Advice
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Keep paint off silicone joints
- Keep paint and stain on wooden frames in good order
- Wash the frames with mild soapy water
- Keep jet washers away from the mastic
Most silicone sealants will not take paint, so if you’re planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
Nearby places to Fernhurst
Also in Fernhurst
Window mastic in Fernhurst: local notes
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Cowdray House (about 4.3 miles south) are a reminder that the area around Fernhurst has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as Fernhurst Primary School, larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Haslemere station, renewing tired window mastic between tenants heads off draught and damp complaints. If you live in an older home near The Parish Church of St Margaret, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Fernhurst is about 10 miles east of Petersfield, in Surrey. Homes, rented property, offices and hotels in Fernhurst is covered for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. Fernhurst is one of 395 towns and villages in Surrey where we work for window mastic. We also work in Portsmouth, about 23 miles from Fernhurst.
Postcode districts we cover here for window mastic: GU27. You will find streets such as Church Road, Merle Way and Bishops Close, and we cover them all. Nearby, we also carry out window mastic in Kingsley Green (1 mile north), Woolmer Hill (2 miles north-west), Linchmere (2 miles north-west), Redford (3 miles south-west) and Haslemere (3 miles north). Further out, we also cover Guildford (15 miles north-east), Farnham (11 miles north), Cranleigh (12 miles north-east), Ash (14 miles north), Godalming (10 miles north-east) and Farncombe (11 miles north-east).
Local landmarks in Fernhurst
For rail, the closest station is Haslemere station, roughly 2.7 miles north of the centre. Other landmarks nearby include Haslemere and District Hospital (2.9 miles north). Green spaces nearby include Blackdown and Cooksbridge Meadow.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Questions from Fernhurst
I let a flat near Haslemere station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Is Fernhurst in your area for window mastic?
Yes, Fernhurst is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Do the sealants smell?
There can be a smell while the sealant cures. Opening a window helps.
Is the new sealant paintable?
That depends on the product. Some hybrid sealants can be painted; silicone can’t. Mention any painting plans before work begins.
Do you work on first-floor windows?
Yes, in most cases. Access is planned before any work starts, so mention the height and anything in the way.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Can you match the sealant to my frames?
Generally, yes. Mention the frame colour when you ask for a quote and we will match it as closely as we can.
Do you have insurance?
Yes. Full insurance covers our work.
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.