The short answer
Compare suitable products, not broad labels. Slate and tiles differ in appearance, specification and repair requirements, but the roof’s pitch, supporting construction, exposure and any restrictions must come first. For an existing roof, find out what can sensibly be retained before assuming a material change is needed.
Start with the roof you already have
If you are repairing a small area, compatibility with the retained covering may be the main issue. If you are replacing a whole roof, you have a wider choice to discuss, but it is still constrained by the building and the proposed design.
Tell us what you like or dislike about the current roof. Perhaps you want to retain the character of a traditional property, improve the consistency of a mixed repair history or understand an alternative to the existing covering. Those are useful priorities.
Also tell us about listing, conservation-area status, shared roof slopes and any relevant permissions. A material change should not be priced as though appearance and approvals are irrelevant, especially where the roof is a prominent part of the building.
Be specific about the products
“Slate” and “tile” are starting categories. Natural slate varies in dimensions, appearance and source. Tile choices include different clay and concrete products, profiles and finishes. Ask what is actually being proposed, rather than comparing a premium example of one material with an unspecified example of the other.
For a local repair, ask whether the replacement will fit and perform with the existing covering. A close colour match is helpful, but it does not establish compatibility. For a new roof, discuss the appearance of the whole slope, ridges and junctions together.
If possible, look at suitable samples. Ask about natural variation and how new material may look beside retained weathered roofing. A photograph on a screen can help start the conversation, but it should not be the only basis for deciding a visible finish.
Check suitability before comparing looks
Marley’s guidance shows that roof fixing specifications depend on the selected product and building conditions, including pitch and location. A roof needs a suitable specification. [1]
The structural implications of changing the covering also deserve attention. Do not assume that all tiles are heavier than all slate, or that a lighter-looking material makes a change straightforward. Compare the actual proposed products and the requirements of the supporting construction.
Ask who will establish suitability and whether any additional design input is needed. Where a material change alters the roof’s details, the quotation should explain those changes rather than treating the covering as an isolated purchase.
Compare the decisions that matter to a homeowner
| Factor | What to compare |
|---|---|
| Appearance | Actual product, colour, texture, profile and the character of the property. |
| Suitability | Pitch, support, exposure, fixing and relevant approvals. |
| Repair | Availability of compatible replacements and access to the affected area. |
| Whole-job cost | Preparation, covering, junctions, access, disposal and associated work. |
| Future care | Maintenance expectations and the condition of components beyond the covering. |
Neither material label answers all five questions. A good recommendation relates the proposed product to your roof, not to a general claim that one category is always superior.
Ask whether sound existing material can stay
Historic Scotland’s slate guide supports retaining reusable sound slate where appropriate when work to other roof components is needed. [2]
For your property, ask what has been assessed and whether reuse forms part of the specification. If matching additional material is required, understand the practical and visual limitations. Retaining suitable material can be worth discussing, but the decision still depends on its actual condition and the planned roof.
For either slate or tiles, distinguish a local repair from reslating or retiling a larger area. The work beneath the covering and at its junctions may be more important to the scope than whether some of the visible pieces are new.
Compare complete costs rather than material prices alone
A price for the covering itself does not describe the installed roof. Access, removal, preparation, fixings, edges, valleys, flashing and disposal all contribute. A material change can introduce additional work that a simple like-for-like comparison misses.
Ask for the same assumptions in each quotation. If one includes extensive support repairs and another assumes the existing construction is retained, the totals are not directly comparable. Keep optional improvements separate so you know what is driving the difference.
Be cautious about lifetime-cost calculations that rely on a guaranteed lifespan for a roof that has not been specified. Discuss the intended outcome, relevant guarantee terms and aftercare. Our roofing costs guide provides a broader budgeting framework.
Make the choice with the property in mind
Ask us to narrow the options to those suitable for the roof, then compare appearance, scope and price. You do not need to become a materials specialist to make an informed choice. You do need an explanation of why the options suit the building.
If the roof is traditional or protected, retain the relevant records and check permissions before agreeing a visible change. For an ordinary repair, ask what can be done to preserve a coherent appearance without treating every weathered component as a defect.
We can discuss slate roofing and roof tiling enquiries across our service area. Send your postcode, the existing covering if known and whether you are planning a repair or wider renewal.
Your questions answered
Is slate always the more expensive option?
Do not assume that from the label alone. Product choice, labour, preparation, access and the extent of the work all affect the installed price. Compare complete quotations for suitable specifications.
Are concrete tiles too heavy for an old roof?
The existing structure and the actual proposed covering need assessment. A general claim about the age of a house or a material category cannot establish suitability. Ask what checks are needed before changing the covering.
Can reclaimed slate be used?
It may be an option if suitable material is available and appropriate for the specification. Ask about condition, dimensions, matching and the scope of any guarantee. Do not assume all reclaimed material is interchangeable.
Can I mix new material with the existing roof?
A repair may involve retained and replacement components, but compatibility and appearance need consideration. Ask what the finished area is expected to look like and whether the product is suitable for the existing arrangement.
Does a longer material warranty mean a better roof?
A product warranty is only one part of the decision. Understand the installation, other roof components, workmanship protection and exclusions. Compare what the actual terms cover rather than only the duration.
Which option would Prestige recommend for my home?
We would start with the existing roof, property, scope and your priorities. After assessment, we can explain suitable choices and their practical differences. There is no responsible one-material answer for every home.
Sources and further reading
Numbered references support the relevant points above. The guidance here is general; the right specification depends on your property.
- Marley, Roof specification technical services available at Marley (updated 24 February 2026).
- Historic Scotland, INFORM Guide: Repairing Scottish Slate Roofs (2006).