What to Expect During a Roof Replacement (UK 2026 Guide)

For Schools, Housing Providers, Councils & Commercial Buildings

By Premier Roofing & Construction Limited

Replacing a roof is one of the most important refurbishment works for any school, housing estate or commercial building. A well-planned replacement improves safety, prevents leaks, and extends the building’s lifespan for decades.

This 2026 guide outlines the full process - from the initial inspection to final handover - so your team knows exactly what to expect.

1. Initial Inspection & Site Assessment

Every replacement begins with a structured roof assessment. PRC checks the condition of the current covering, flashings, drainage, outlets, parapets and potential water ingress points. Where needed, we use drones for large estates and moisture readings or core samples for roofs showing signs of trapped water.

You’ll receive a clear photographic report with findings, recommended options, and a programme outline - essential for councils, schools, housing associations, and commercial clients.

2. Pre-Start Planning & Compliance

Once the preferred specification is agreed upon, Premier Roofing & Construction prepares all compliance and safety documentation.

This includes RAMS, Safe-to-Torch protocols, scaffold design, CDM requirements and fire safety measures. We also coordinate access and scheduling to minimise disruption to residents, pupils or staff.

🔒 Public-sector compliance is built into every stage.

3. Removing the Existing Roof

The old roof coverings are removed in a controlled, safe manner. This may include stripping felt, liquid coatings, single-ply membranes, tiles or slates. Flashings, perimeters and defective insulation are also taken up.

♻️ All materials are carefully removed from the site and disposed of responsibly.

4. Decking Repairs & Preparation

With the old system removed, we inspect the roof deck for rot, water damage or structural weakness. Any compromised sections are replaced so the new system is installed on a safe, solid base.

🛠️ Preparing the roof correctly is one of the biggest factors in long-term performance.

5. Installing the New Roof System

The installation method depends on the chosen system - felt, liquid, single-ply, slate, tile or lead. PRC installs systems to manufacturer standards to ensure the full guarantee is valid.

Flat Roof Examples

• Warm roofs include a vapour control layer, insulation and the new waterproof covering.

• Cold roofs are used where existing insulation is below the deck or height increases are restricted.

Pitched Roof Examples

Tiles or slate are removed and replaced with new battens, breathable underlay, upgraded ventilation and new coverings.

Lead Roof Examples

New lead bays are formed to the LSA guidelines with correct expansion joints and detailing.

No matter the specification, all details, outlets, trims, flashings and junctions are renewed.

6. Safe-to-Torch & Fire Controls

Many sites - especially schools, timber structures and housing blocks - require strict fire controls.

🔥 Premier Roofing & Construction follows the full NFRC Safe-to-Torch guidance, using flame-free systems where needed and ensuring hot works are carried out under the correct permits and supervision.

7. Final Checks, Testing & Handover

Once installation is complete, PRC carries out:

• Thermal or moisture checks (if required)

• Drainage flow assessment

• Detailed inspection of seams, joints and details

After approval, you receive a completion certificate, manufacturer's guarantee, photos, and maintenance recommendations.

📄 If required, we can also provide data for asset management planning.

8. Guarantees & Ongoing Care

Your new roof can include:

• Manufacturer-backed guarantees (10–25 years)

• PRC workmanship guarantee

• Optional maintenance inspections

• Annual condition checks for estates and multi-building portfolios

🧾 Guarantees vary based on the chosen system and specification.

How Long Does a Roof Replacement Take?

Project Type	Typical Duration
Small flat roof	2-4 Days
School/housing block	1-4 Weeks
Large commercial site	Multi-phase programme

Premier Roofing & Construction schedules work to minimise disruption and ensure safety for all building users.

Before You Start Your Project

A roof replacement is a major investment - but with the right contractor and a clear process, it becomes smooth, safe and cost-effective.

Premier Roofing & Construction Ltd delivers fully compliant roof replacements across London, Essex, Kent & the South East, specialising in:

🏫 Schools

🏘️ Housing associations & councils

🏢 Commercial buildings

🏙️ Large residential blocks

If you’d like clarity on costs, timelines or specifications, we’re here to help.