Hampshire · England
Window Mastic in Andwell
Window mastic for Andwell, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked or shrunken mastic around the frame
- Draughts coming in around windows and doors
- Water coming in at the bottom corners of a door
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
How we handle window mastic in Andwell
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. If you are dealing with gaps where the sill meets the wall and hard, cracked sealant around windows, we can help, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Andwell is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Andwell (RG25, RG27, RG24)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Andwell
A quick bead over the top of old mastic looks like an easy fix, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Where a wall is exposed, as many are in small places like Andwell, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Leaving a failed joint generally makes the job bigger, not smaller. If you are unsure, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Andwell
- Colour agreed with you before work begins
- Old sealant always removed completely
- A 12-month guarantee on all work
- Approved under the ARBOMaster scheme
Take a look at our cost guide and customer reviews.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
We work for landlords and letting agents as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Different surfaces, different methods
Patio & French doors
Water at the foot of a door frame is not always the mastic: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We look for the cause first.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
Windows and doors in Andwell
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like The Vyne (about 4.2 miles north-west) are a reminder that the area around Andwell has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Homes close to St Swithun's church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Andwell is about 3 miles south-west of Hook, in Hampshire. Jobs in Andwell get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 683 places across Hampshire, large and small. You can also see our page for Reading, about 13 miles away.
Jobs for window mastic in RG25, RG27 and RG24 works the same way as everywhere else we cover. Window mastic is available to properties on Greywell Road and Canal Reach and the roads around them. Other places close to Andwell include Mapledurwell (1 mile south), Water End (1 mile north-east), Old Basing (1 mile west), Lychpit (2 miles west) and Wildmoor (2 miles north). Further out, we also cover Basingstoke (4 miles west), Farnborough (11 miles east), Fleet (8 miles east), Aldershot (11 miles east), Alton (8 miles south) and Yateley (9 miles north-east).
Landmarks near Andwell
For rail, the closest station is Hook station, about 2.4 miles east of the centre. A little further out are Festival Place (3.1 miles west) and Basingstoke and North Hampshire Hospital (4.2 miles west). Not far away are Dogmersfield Lake and The Mill Field.
Do you need window mastic in Andwell?
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
It’s worth asking for a quote if you see:
- Whistling draughts around closed windows
- Cracked or shrunken mastic around the frame
- Rushed sealant from a window installation
- White mastic on grey or black frames
Letting a property close to Hook station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
What to look for in a quote
- Is VAT in the price?
- How the joint is cleaned and prepared
- Whether they’re fully insured
- How long the guarantee is
How it works
Before we leave, we go over the finished joints with you and tell you how long to leave it. The visit itself normally takes most of a day for a typical house, less for a few frames, depending on the size of the job. In a small place like Andwell, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Try not to wet indoor joints just before the visit
Get a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Related advice
Nearby places to Andwell
Also in Andwell
Honest limits
It helps to know what we cannot do too:
- Condensation trapped between the panes
- Draughts through the window seals rather than the frame
- A frame that has rotted at the joint
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
Joints and surfaces we work on
- Window sills
- uPVC windows
- Patio & French doors
- Composite doors
- Aluminium frames
- Timber windows & doors
Common questions in Andwell
Do you work for landlords with property near Hook station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Is Andwell in your area for window mastic?
Yes. Our work covers London and the South East, and Andwell is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Is the work guaranteed?
Yes. Every job comes with our 12-month guarantee, and we are ARBOMaster approved applicators.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
How long does it take to reseal the windows on a house?
It depends on access, the old mastic and the size of the frames. We’ll tell you how long your job needs when we quote.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.