Mastic Sealing in Cranmore
Planning work on a mastic joint in Cranmore? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Brittle perimeter mastic across a building
- Draught complaints from residents or tenants
- Complaints coming in block by block
Mastic sealing across Cranmore
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Doing it in-house
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.
General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.
About our mastic sealing in Cranmore
We diagnose before we prescribe: what has failed, what caused it and whether new sealant will actually solve it. Failed mastic is stripped, the faces taken back to sound material, primed where the manufacturer specifies and resealed and backing rod used wherever a joint is deep. If you’re dealing with window mastic that has split and shrunk and complaints coming in block by block, we can put it right, whatever the surface. Looking for mastic applicators who cover Cranmore? We have been sealing commercial buildings since 2005, with CSCS-carded applicators.
Rural conversions near places like Cranmore often set modern frames into older stone, flint or brick. The mastic needs to suit an irregular masonry face and the look of the building.
Every job we finish is backed by a 12-month workmanship guarantee, in Cranmore as everywhere else we work. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Location
- Cranmore (PO41)
- Region
- Isle of Wight
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Building owners, agents and FMs in Cranmore
Hotels, schools, healthcare sites, offices and retail units come to us directly as well. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.
Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.
Why act early in Cranmore
Replacing mastic before water gets in is a planned job. After water has got in, there may be damp, damaged plaster or decoration to put right too, and the complaints come with it. Around Cranmore, it’s better to renew all the failing joints at once, rather than one at a time. Send photographs of each area and we will quote for the lot.
The product called for affects the cost, and so does the preparation, from cutting out to priming and backing rod. Access, phasing and site requirements come into it too.
Why appoint us
- CHAS accredited contractor
- A Constructionline member, so easy to vet
- Work to your specification and the manufacturer’s guidance
- One phone line for London, the South East and Scotland
See what affects the cost or our accreditations and insurance.
Looking after buildings in and around Cranmore
With the shore within about 1 mile, Cranmore counts as a coastal location. Blocks and commercial buildings facing the sea take the most weather on their window perimeters and external joints, so it’s worth inspecting those sides more often. Cranmore sits in one of the drier corners of the country, the South East. External mastic still waits for dry faces and the right temperature, and the sunniest, most exposed sides of a building usually need attention first.
For agents with blocks near Lymington Pier station, which lies north-west of Cranmore, a block-wide mastic programme deals with frames, balconies and entrances in one go. Older buildings near Cranmore, from historic houses such as Swainston Manor, 3.4 miles to the south-east of Cranmore, to more modest stock, need compatible products when frames are resealed. Site managers at schools like Shalfleet Church of England Primary School can fit frame mastic into the summer works.
Cranmore is about 6 miles south-east of Lymington, in the Isle of Wight. Commercial clients in Cranmore can call on us for mastic joints. Across the Isle of Wight, 125 places are covered, Cranmore among them. For work in that direction, see our Southampton page, about 14 miles away.
Postcode districts covered here: PO41. Among the streets we cover are Solent Road, East Close and Cranmore Avenue. Nearby places we also cover include Hamstead (1 mile north-east), Shalfleet (1 mile south-east), Bouldnor (1 mile west), Yarmouth (2 miles west) and Thorns Beach (4 miles north). Bigger towns within reach include Newport (6 miles east), Ryde (12 miles east), Cowes (7 miles north-east), Sandown (13 miles east), Shanklin (13 miles south-east) and Ventnor (13 miles south-east). For island and remote sites, we plan travel and materials carefully, so include the location in your enquiry.
Near you in Cranmore
The nearest railway station is Lymington Pier station, about 4.9 miles north-west of the centre. Well-known places in the area include Calbourne Water Mill And Rural Museum (2.6 miles south-east) and Yarmouth Castle (2.4 miles west). Open spaces near Cranmore include Boldre Foreshore and Compton Down.
Also in Cranmore
Diagnose, treat, sign off
Working in a building that stays open takes some planning. The work area is signed and kept contained, keep walkways clear and work section by section so the rest of the building stays in use. Smaller jobs around Cranmore can be grouped with others nearby. A fixed quote is given before anything starts.
- First comes a look at the joints and, for older buildings, the asbestos records.
- A fixed quote covers the joints, products and order of work.
- Failed mastic is removed completely.
- Joint faces are cleaned, backed and resealed.
- We finish each building before moving to the next.
What we need from you
- Tell us what induction or permit system the site runs
- For older buildings, check the asbestos register before work
- Send any specification or drawings in advance
Ask for a quote
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to speak to us on 01277 525 020 or email a schedule or drawings with what you know.
Read more
Common questions from Cranmore clients
Do you work for managing agents with blocks near Lymington Pier station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Give us the building’s details and say how residents are notified, and we will quote and plan to suit.
Does the sea air around Cranmore change the choice of sealant?
It can. Coastal exposure works external joints harder than inland weather. Product choice and preparation matter more, and sea-facing elevations are worth inspecting more often.
Do you guarantee the mastic work?
There is a 12-month guarantee on our workmanship and we hold public liability insurance.
Who decides which product is used?
If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Is it fine to apply new sealant on top of old?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.
Is Cranmore in your area?
Yes. We take on work across Cranmore, and the same phone number covers every area.
Do you work to architects’ specifications?
Yes. The specification and the manufacturer’s installation guidance are what we work to.
What sets the cost
We price every job individually. The things that drive the figure:
- Whether the work must be split into stages
- Removal of failed or old sealant
- Induction, permit and paperwork requirements
- Distance, for remote addresses
We don’t publish prices, since every building and every scope is different. For a fixed figure, call for a quote and we will price your job on its own details.
What to include in your enquiry
A good diagnosis starts with the right details. Tell us:
- Whether an asbestos survey exists
- Approximate linear metres or a joint schedule
- The postcode of the building
- How the joints are reached, and at what height
Photos, drawings or a schedule of the joints are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.
Different surfaces, different methods
Window and door perimeters on blocks
Frames vary from uPVC to aluminium and timber, and the product is matched to the frame material and the masonry. We’ll confirm the colours available for the specified product.
Tenement and older buildings
Traditional buildings have joints that need a careful approach. The material either side of the joint shapes the product choice.