Surrey · England
Window Mastic in Bellfields
Window and door frames in Bellfields need attention? We remove the old material, prepare the joints and seal them properly.
- Draughts coming in around windows and doors
- Cracked internal joints between frame and plaster
- Rain getting in at the frame or under the sill
What the job involves on each surface
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We will point out any rot we find, as a joiner will need to deal with it.
How we handle window mastic in Bellfields
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. The old mastic is removed and the joint resealed with a flexible exterior sealant. We work on aluminium frames, timber windows & doors and uPVC windows, and people most often call us about draughts coming in around windows and doors and gaps left after new windows were fitted.
Houses in smaller places like Bellfields can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. That’s hard on the mastic around frames and sills.
Every job comes with a one-year guarantee.
- Place
- Bellfields (GU1, GU2, GU3)
- Region
- Surrey
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What window mastic looks like in Bellfields
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Guildford Castle (about 1.5 miles south) nearby, there’s older building stock in the area around Bellfields as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you let a flat or house near London Road (Guildford) station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. If you live in an older home near St Peter's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Bellfields is about 1 mile north of Guildford, in Surrey. Wherever you are in the GU1 postcode area, we cover window mastic for homes and businesses. Bellfields is one of 395 towns and villages in Surrey we cover for window mastic. You can also see our page for Crawley, about 20 miles away.
Postcode districts we cover here for window mastic: GU1, GU2 and GU3. Local streets include Lock Road, Manor Road and South Road, all of which we cover. Main roads around Bellfields include the A3 and A320, so getting to you is simple. We also cover Guildford (1 mile south), Stoughton (1 mile west), Jacobs Well (1 mile north-east), Westborough (1 mile south-west) and Abbotswood (1 mile south-east). Larger places within reach include Woking (4 miles north), Camberley (8 miles north-west), Epsom (15 miles north-east), Farnham (10 miles west), Egham (12 miles north) and Walton-on-Thames (12 miles north-east).
Near you in Bellfields
In Bellfields, that means homes and buildings near Weyfield Academy, Christ's College and Riverside Park and the streets around them. The closest station to Bellfields is London Road (Guildford) station, about 1.2 miles south-east. A little further out are Guildford Castle (1.5 miles south) and Guildford Cathedral Treasury (1.1 miles south-west). Green spaces nearby include Pewley Hill and Pewley Down.
How to look after the new joints
A little care helps the new joints last. Our advice:
- Keep solvents and bleach off the sealant
- Make sure the drainage slots are not blocked
- Keep paint and stain on wooden frames in good order
- Wash the frames with mild soapy water
Most silicone sealants won’t 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.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
What affects the quote in Bellfields
The quote reflects the job in front of us. We take into account:
- Access and height
- When we can work, for business premises
- How many rooms, windows or areas are involved
- Whether there’s mould to deal with
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or email us.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Whether it has been sealed before
- Any access issues, like height or stairs
- Roughly how big the job is
- Pictures of the joints, sent by email
To get a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Bellfields: your questions answered
Do you work for landlords with property near London Road (Guildford) station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Do you cover Bellfields for window mastic?
Yes, Bellfields is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Can you do the inside joint as well?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Does someone need to be in?
If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.
Landlords, agents and businesses in Bellfields
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Housing providers, facilities teams and property managers book us too in Bellfields and across Surrey. Several sites can go on one quote.
What happens on the day
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a morning for a couple of windows and a door. For a job in Bellfields, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work.
Read more
Places near Bellfields
What else we do in Bellfields
Should I try it myself first?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
When to call us in Bellfields
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
People normally contact us when they notice something like this:
- Gaps between the frame and the inside reveal
- Rain getting in at the frame or under the sill
- Old mastic that has gone black or come away
- Rushed sealant from a window installation
For site and facilities teams at buildings such as Pond Meadow School, larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- When the joint can take water or movement
- Which colour the sealant will be
- What guarantee comes with the work
- How the joint is cleaned and prepared