Surrey · England

Outwood Window Mastic

Our applicators work in Outwood on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.

  • A bead that doesn’t match the frame
  • Water coming in at the bottom corners of a door
  • Cracked sealant at the sill ends

Book window mastic in Outwood

Honest limits

It helps to know what we can’t do:

  • Draughts through the window seals rather than the frame
  • Misting between the panes of a double-glazed unit (that needs a new unit)
  • Rotten timber, which needs a joiner first

If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.

Joints and surfaces we work on

  • Composite doors
  • Timber windows & doors
  • Window sills
  • Aluminium frames
  • Patio & French doors
  • uPVC windows

Window mastic in Outwood, done properly

Around Outwood we seal all kinds of frames: from uPVC casements to timber and aluminium, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. If you have gaps between the frame and the inside reveal and damp patches on the reveal after heavy rain, we can help.

Around Outwood, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.

The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.

Outdoor mastic being applied where a white frame meets red brickwork, below the fascia and gutter
Place
Outwood (RH1)
Wider area
Surrey
Guarantee
A year, on every job
Quotes
A clear quote up front
Phone
0345 464 0079
Updated
26 October 2026

Why it’s worth doing now in Outwood

Resealing frames is a short job: it takes a few hours for a handful of frames, longer for a whole house. Leave it until water is coming in and you may need plastering and decorating as well. In a small place like Outwood, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.

A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, call 0345 464 0079 or email us and we will give you an honest view and a quote.

What you get with us

  • Anti-fungal sanitary silicone in wet areas
  • White, clear, grey or coloured to suit, where the product allows
  • Homes, businesses and hotels
  • Over 20 years’ experience

Read our cost guide and our reviews.

Outwood homes and the weather

The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.

If you live in an older home near Church of St John the Baptist, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Salfords station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like Oakwood School? Then larger buildings have plenty of frames, and the mastic around each one ages.

Outwood is about 3 miles east of Horley, in Surrey. From the centre of Outwood to the outskirts, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Our area takes in 395 places across Surrey, from the larger towns to small villages. For nearby work, see our Crawley page (7 miles or so).

Here we cover the RH1 postcode area for window mastic. Streets in the area include Miller's Lane, Bellwether Lane and Scott's Hill. Nearby, we also carry out window mastic in Smallfield (1 mile south), Horley (3 miles west), Burstow (3 miles south), Fernhill (3 miles south-west) and Keeper's Corner (3 miles south). Further out, we also cover Epsom (12 miles north-west), Redhill (4 miles north-west), Ewell (13 miles north-west), Reigate (5 miles north-west), Caterham (7 miles north) and Dorking (10 miles west).

Around Outwood

Locally, jobs take us to homes and businesses close to The Castle pub, among other places. The nearest railway station is Salfords station, about 2.2 miles west. Nearby you’ll also find Effingham Park Motor Museum (3.7 miles south) and East Surrey Hospital (2.9 miles north-west). Green spaces nearby include Bay Pond and Hedgecourt Lake.

Map of Outwood © OpenStreetMap contributors

What we do, step by step

Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes most of a day for a typical house, less for a few frames. Somewhere like Outwood needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.

  1. Each frame is looked over and we agree which ones need resealing.
  2. We remove the old mastic and clean the frame edge and wall.
  3. Where the gap is deep, backing rod goes in first.
  4. A flexible exterior sealant is applied in a colour to suit the frame.
  5. We tool each bead neatly and check every joint is closed.

How to prepare

  • Mention any leaks or damp you’ve noticed
  • Mention any tricky access
  • Tell us about any previous sealing or DIY attempts

Ask for a quote

It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, ring 0345 464 0079 or send us an email.

Ask for a quote

Advice

Keeping the joints in good condition

Once the sealant has cured, a few habits help it last:

  • Keep paint off silicone joints
  • Make sure the drainage slots are not blocked
  • Air rooms to keep condensation down around windows
  • Wash the frames with mild soapy water

Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.

Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.

Questions from Outwood

Can you do window mastic in Outwood?

Yes. We work across London and the South East, and Outwood is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing, and we’ll send you a clear quote.

Will you come out to Outwood?

Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.

Do you remove the old sealant?

Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.

Do I need to be at home?

We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.

Where do you work from?

Our base is in Crawley, and we cover South East England, London and all of Scotland.

Can you do the inside joint as well?

Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.

What do you need from me for a quote?

Tell us what needs doing and where, plus pictures if you have them. If we need more, we will ask.

Can you seal over the old sealant?

No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.

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.

A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.

What affects the quote in Outwood

We don’t publish a price list, because no two jobs are the same. What we look at:

  • Whether the work is at height
  • Mould in or behind the old joints
  • How many rooms, windows or areas are involved
  • The size of the job

The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.

What to tell us for a quote

What to tell us when you ask for a quote:

  • What the problem is, such as mould, gaps, leaks or cracking
  • How many joints, rooms or windows are involved
  • Where the property is
  • A few pictures by email, if you can

Getting a quote is simple: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand.

Work for landlords, hotels and businesses

We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.

We work for landlords and letting agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job