Surrey · England
Alfold Window Mastic
Problem with your window and door frames in Alfold? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Gaps between the frame and the inside reveal
- White mastic on grey or black frames
- Cold air getting in at the frame edge
Alfold questions
Is there a guarantee on window mastic in Alfold?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Is Alfold within the area you cover?
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.
Can you seal the gap between the frame and the plaster indoors?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we’re using and why.
What does window mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Window mastic for homes and businesses in Alfold
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are ARBOMaster approved and fully insured, and we give a one-year guarantee on the work. We work on timber windows & doors, window sills and patio & French doors, and common reasons people get in touch are gaps where the sill meets the wall and rain getting in at the frame or under the sill.
Outdoor sealant needs dry, clean surfaces, so work on frames around Alfold is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
A 12-month guarantee comes as standard, so you’re covered after we’ve gone.
- Location
- Alfold (GU6)
- Region
- Surrey
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
Good habits help new joints last longer. A few tips:
- Avoid harsh chemicals near the mastic
- Keep paint off silicone joints
- Avoid blasting the frames with a pressure washer
- Air rooms to keep condensation down around windows
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. Resealing closes it.
What the job involves on each surface
Window sills
Masonry sills can have joints where water gets in, and the joint under the frame can let rain run behind. We seal those with a sealant suited to masonry.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. If we find rot, we will tell you before going ahead, as that’s a job for a joiner.
Towns and villages near Alfold
More services for Alfold
What we do, step by step
We keep the work tidy and contained to the area we’re working on, so you can get on with your day. The job generally takes a morning for a couple of windows and a door, and we tell you how long to leave it before we go. In a small place like Alfold, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
- Tell us about any water getting in
How to get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work before giving you a price.
Read more
Window mastic in Alfold: local notes
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of St Nicholas, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Alfold is about 9 miles west of Horsham, in Surrey. For window mastic in and around Alfold, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We cover Surrey from our Crawley base, Alfold included. Alfold is one of 395 towns and villages in Surrey where we work. You can also see our page for Crawley, about 14 miles away.
Work in GU6 is quoted and booked the same way as anywhere else. Window mastic is available to properties on Chapel Field Close, Loxwood Road and Cypress Grove. Neighbouring places we cover for window mastic include Alfold Bars (1 mile south), Loxwood (1 mile south), Ifold (2 miles south), Durfold Wood (3 miles west) and Plaistow (3 miles south-west). Within a short drive, we also cover Guildford (11 miles north), Woking (15 miles north), Farnham (14 miles north-west), Dorking (12 miles north-east), Haslemere (9 miles west) and Cranleigh (3 miles north-east).
Around Alfold
We work in homes and buildings around The Crown pub and Fir Tree Copse, among other places. The countryside around Alfold includes Shillinglee Lake.
Why deal with it now?
A cracked joint around a frame lets rain into the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Older cottages and farmhouses around Alfold can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and agree the price before starting.
Why Alfold clients choose us
- White, clear, grey or coloured to suit, where the product allows
- Anti-fungal sanitary silicone in wet areas
- 180+ five-star Google reviews
- Neat joints and a tidy finish
See what affects the cost and customer reviews.
What affects the quote in Alfold
There’s no set price list, because jobs vary so much. The quote depends on:
- The type of sealant required
- The number and length of the joints
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- Where the property is
- Any previous sealing or DIY work
Getting a quote is simple: tell us what needs doing and where. Photos by email help us understand the job, and we will take it from there.
When to call us in Alfold
Frames are never completely still. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. A sealant that can’t keep up eventually tears.
Common reasons people contact us are:
- Cracked sealant at the sill ends
- Rushed sealant from a window installation
- Sealant in the wrong colour for the frame
- Hard, cracked sealant around windows
In and around Alfold, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- Whether they’re fully insured
- How the joint is cleaned and prepared
- How long to leave it before use
- What happens if they find a problem under the old sealant
Landlord and commercial work in Alfold
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.