Hampshire · England
Window & door mastic in Clayhall, Hampshire
Window mastic in Clayhall from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Untidy mastic left by window fitters
- Water coming in at the bottom corners of a door
- Gaps where the sill meets the wall
What affects the quote in Clayhall
There’s no set price list. The quote depends on:
- The type of sealant required
- Mould in or behind the old joints
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
What we need to know
What to tell us when you ask for a quote:
- Photos by email, if that is easy
- The problem you’ve noticed
- Access, such as stairs, a lift or height
- Whether it has been sealed before
For window mastic in Clayhall, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Window mastic for homes and businesses in Clayhall
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that can’t move properly, so deep gaps get backing rod first. The sealant then grips the two sides it should. Common call-outs are for mastic that has split away from the wall and a bead that doesn’t match the frame, across composite doors, window sills and aluminium frames.
In a smaller place like Clayhall, some walls face open ground and catch the full force of the weather. The mastic around frames on those walls tends to age faster.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Clayhall (PO12)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why deal with it now?
Draughts and leaks do not always mean new windows. Where the frames are sound, new mastic generally deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we’ll tell you. In a smaller place like Clayhall, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and agree the price before starting.
Why choose Mr Mastic in Clayhall
- More than 20 years in sealant work
- Anti-fungal silicone where joints get wet
- Every job guaranteed for a year
- We agree the colour with you first
Clayhall homes and the weather
Clayhall is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. 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.
Managing a site like Haselworth Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Portsmouth Harbour 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 Francis, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Clayhall is about 2 miles south-east of Gosport, in Hampshire. If you need window mastic in Clayhall, please phone 0345 464 0079 or send us an email for a quick quote. We are based in Crawley and cover Hampshire, Clayhall included. Our area takes in 683 places across Hampshire.
Here we cover the PO12 postcode area for window mastic. That includes homes and businesses on The Lane, Old Road and Fort Road and the roads around them. Neighbouring places we cover for window mastic include Haslar (1 mile south-east), Alverstoke (1 mile west), Portsmouth Point (1 mile north-east), Privett (1 mile north-west) and Portsea (2 miles north-east). Larger places within reach include Havant (8 miles north-east), Fareham (6 miles north-west), Horndean (10 miles north-east), Hedge End (12 miles north-west), Waterlooville (8 miles north-east) and Purbrook (7 miles north-east).
What’s near Clayhall
Locally, jobs take us to homes and businesses close to Bay House School, The Fighting Cocks pub and St Vincent College. The nearest railway station is Portsmouth Harbour station, about 1.4 miles north-east of the centre. Other landmarks nearby include Gosport War Memorial Hospital (1 mile north-west) and Search (0.9 miles north). The countryside around Clayhall includes West of the River Alver.
Surface by surface
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. Most leaks start at the bottom corners, so they get particular care.
Window sills
Sills catch the water running down the glass, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
How it works
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours for a handful of frames, longer for a whole house, depending on the amount of work. A visit to Clayhall is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any water getting in
- For business premises, tell us about site rules or sign-in
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or send us an email.
Advice
Landlords, agents and businesses in Clayhall
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Nearby places to Clayhall
Also in Clayhall
When it is not the sealant
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Faulty window hardware
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Joints and surfaces we work on
- Aluminium frames
- Window sills
- Timber windows & doors
- Patio & French doors
- Composite doors
- uPVC windows
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Common questions in Clayhall
Is window mastic in a coastal place like Clayhall any different?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Do you work for landlords with property near Portsmouth Harbour station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Where are you based?
We work from Crawley. We cover Clayhall and the rest of Hampshire, along with the rest of our area.
Is it worth trying it myself?
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 do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we’re using.
Can you seal the gap between the frame and the plaster indoors?
Yes, we do both. Inside, the joint between frame and plaster is sealed neatly, using a paintable sealant if you want to decorate.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How do I get a quote for window mastic in Clayhall?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before we start.