The Mastic Doctor team standing beside their branded vans outside an office building
Hampshire · England

Construction and new-build mastic in New Forest, Hampshire

Planning work on a mastic package in New Forest? We assess it, carry out the work and guarantee our workmanship for 12 months.

  • Sanitary sealant damaged by following trades
  • Snag items on joints that need redoing before handover
  • Frame perimeters left unsealed or poorly sealed
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Construction mastic near New Forest

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Owners, agents and contractors

We work for building owners and managing agents on sealant work across single buildings or whole portfolios. One quote can cover more than one site, which keeps the paperwork simple.

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.

Construction mastic in New Forest, done properly

We work to the specification and the programme rather than whatever product is to hand. Where the specification names a product, we use it, and if an alternative is proposed, it goes to you for acceptance first. Joint widths, backing, primers and tooling follow the manufacturer’s guidance. We work on cladding and panel joints, window and door perimeters and internal decorators’ caulk, and what we are called in for most is a long mastic snag list close to completion and perimeter gaps outside the sealant’s range. One point of contact handles commercial sealant work in New Forest from the first photographs to the final walk-round, whether it’s one building or several.

Sites around smaller places like New Forest can be a fair drive from suppliers, so we come with everything the package needs. Drawings, photographs and the programme let us give a fixed quote.

What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

Location
New Forest (SP6)
Wider area
Hampshire
Cover
12 months on every job
Quotes
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Common problems we fix in New Forest

Shrinkage and settlement in the first months put new joints under strain. Materials lose construction moisture and shrink and internal caulk in a moving joint is typically the first to crack. Picking a flexible sealant where there’s movement keeps snags down.

If one of these sounds familiar, it’s time for a closer look:

  • Frame perimeters left unsealed or poorly sealed
  • Oversized or tapered gaps around new frames
  • Different trades sealing to different standards
  • Old sealant on a refurbishment that needs stripping before new work

Sites around New Forest get mastic sealed to the drawings and the programme, nothing improvised.

Before you book anyone

  • Is the sealant right for the movement and the substrate?
  • What site paperwork they can supply
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • Are they CHAS accredited or on Constructionline?

Questions to ask before you appoint anyone

When it isn’t the sealant

A few problems need another trade or a different fix, and we point that out rather than sealing over them:

  • Designing joint widths or choosing the specification (that sits with the designer)
  • Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)
  • Defective windows, doors or glazing units (the supplier or installer’s job)

If you are not sure, just call 01277 525 020 or email us and we will give you a straight answer before you book.

What we seal

  • Floor and skirting junctions
  • Internal decorators’ caulk
  • Window and door perimeters
  • Brick and block movement joints
  • Cladding and panel joints
  • Sanitary and kitchen joints

How a job runs

Before we leave any area, the masking comes off, the area is cleaned and every joint is checked with your site contact. Where the sealant needs time to cure before use, we tell you and sign the area. For a building around New Forest, tell us how to find it and who will meet us. Send that with the details and we’ll confirm the plan with the quote.

  1. We walk the site or review drawings to understand the package.
  2. A fixed quote sets out scope, products and phasing.
  3. Site paperwork is confirmed and our CSCS-carded applicators are inducted.
  4. We seal plot by plot or floor by floor in line with the programme.
  5. Any frame gaps or issues outside our scope are flagged to the site team.
  6. Final snagging is completed and the 12-month guarantee applies.

What we need from you

  • Flag any permit to work we will need
  • Have the specification and drawings to hand
  • Tell us your opening times and when work is allowed

Ask for a quote

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. If the job needs a look first, we’ll arrange a site visit.

Get a price

Advice

Why deal with it now?

Sealing over damaged or contaminated new joints might save a day. New sealant laid on old or dirty sealant has nothing to bond to, and the defect comes back after handover. We cut out and redo the joint properly. For buildings around smaller places like New Forest, water damage can go unnoticed for longer, especially where a building isn’t used daily, so a failed joint can leak for a while before anyone sees it. Renewing joints in good time avoids the problem.

Larger quantities, tricky access or phasing all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.

Why appoint us

  • 12-month guarantee on workmanship
  • Coloured sealants to suit the setting, where available
  • CHAS accredited
  • Joints cleaned back to sound surfaces

Read our cost guide and our accreditations and insurance.

FAQs: New Forest

Will you fit the mastic around our build programme in New Forest?

Yes. The mastic is planned around your key stages. Let us know which documents your site asks for, and we’ll confirm them alongside the quote.

Is New Forest too far out for you?

Not at all: smaller places are covered as well as towns. London and every South East county are within our area. Send photographs and a list of what needs doing, and we will plan the job to need as few trips as possible.

How long does a typical visit take?

It depends on the scope, but the work usually takes as long as the agreed sequence needs, which comes down to joint lengths, access and handover dates. Larger or phased jobs take longer, and we will give you a timescale with the quote.

What guarantee comes with a mastic package?

It’s backed by our 12-month guarantee on the workmanship. Protecting sealed areas from following trades helps avoid damage.

Can staff carry on working while you’re here?

Usually, yes. We phase the work so most of the building stays in use, with each area protected and signed.

What do you charge?

It depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a fixed quote and we’ll price it properly.

Which sealant will you use?

Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.

Different surfaces, different methods

Fire-rated sealant where specified

Fire-rated sealant is one type of fire-stopping product. Other products are used for some services and gaps so we will flag where the detail needs something different. Record requirements are agreed with the quote.

Window and door perimeters

Internal perimeters are typically sealed with a paintable product where decorating follows. The specification decides which with colours matched to the frame where needed.

Facades, frames and programmes in New Forest

Rainfall across the South East, New Forest included, is lower than in many parts of the UK. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, so the external programme keeps a little slack.

Around New Forest, as anywhere, a facade joint depends on its sizing, backing rod and preparation.

New Forest is in Hampshire. Anywhere in SP6, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. 723 places across Hampshire fall within our area, including New Forest. Southampton is covered too, some 23 miles away.

We cover the SP6 postcode districts. Streets here include Sillens Lane and Townsend Lane, and sites on any of them can send details for a fixed quote. If your building is just outside New Forest, we cover Martin (1 mile north-east), Rockbourne (3 miles east) and Damerham (3 miles south-east). Nearby towns on our patch include Ringwood (11 miles south-east), Fordingbridge (6 miles south-east), St Leonards (11 miles south), Alderholt (6 miles south-east), Poulner (11 miles south-east) and Ashley Heath (10 miles south).

Near you in New Forest

Nearby you’ll also find Cranborne Castle Hill (4.4 miles south). Green spaces nearby include Western Downs.

Map of New Forest © OpenStreetMap contributors
Accreditations

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