Driveway Advice
Should I seal a block-paving driveway?
Block paving does not automatically need sealing. Marshalls says it does not consider sealing necessary for its block paving because the surface must be completely clean, dry and dust-free, and a sealer can change the appearance or wear unevenly. On permeable block paving, an unsuitable sealer can also clog the joints and reduce water infiltration. If sealing is being considered for stain resistance, colour or joint stabilisation, check the paving and sealer manufacturers' written guidance first and test a small area before treating the whole driveway.
Sealing is optional, not a standard requirement
Marshalls states that sealing is not necessary for its block paving. That does not mean every sealer is unsuitable; it means a homeowner should not accept sealing as an automatic extra without understanding the product, intended benefit and future maintenance. The paving manufacturer's instructions should take priority over a generic promise that every driveway must be sealed.
Appearance can change and wear may be uneven
A sealer can deepen colour, add gloss or change the way light reflects from the blocks. Marshalls warns that sealants may affect appearance and wear unevenly. Test the exact product on a small, inconspicuous area and allow it to cure before deciding whether the finish is acceptable across the full driveway.
The surface must be clean and completely dry
Marshalls says a sealant should be applied only to a surface that is clean, dry and free from dust. Dirt, algae, residual moisture or efflorescence can be trapped beneath a coating. Joints also need the correct sand level before treatment, and any cleaning residue must be removed in accordance with the product instructions.
Permeable paving needs special care
Marshalls specifically warns that some sealants can clog the joints of permeable Priora paving and affect the water infiltration rate. A permeable driveway works as a complete system. Any treatment that changes how water enters the joints should be approved in writing for the exact paving system rather than assumed compatible.
A sealed driveway still needs ongoing maintenance
Marshalls' cleaning guidance says sealants may require reapplication during the life of the paving. Sealing does not remove the need for sweeping, stain treatment, joint checks or careful cleaning. Ask the quote to state the expected finish, slip considerations, preparation, cure time, maintenance cycle and how a future coating can be applied over the first one.
Before authorising a block-paving sealer
- Confirm the paving manufacturer permits the proposed sealer.
- Identify whether the driveway is permeable and protect its infiltration route.
- Agree how the surface, joints and stains will be prepared.
- Approve a cured test patch for colour, gloss and slip feel.
- Get the maintenance and future recoating requirements in writing.
| Question | Why it matters | Evidence to request |
|---|---|---|
| What benefit is expected? | Colour enhancement, stain resistance and joint stabilisation are different objectives | Named product and written purpose |
| Is the paving permeable? | An unsuitable coating may restrict infiltration | Compatibility with the exact permeable system |
| Is the surface ready? | Moisture, dust and contamination can be trapped | Cleaning, drying and joint-preparation method |
| Will appearance change? | Gloss and colour can vary or wear unevenly | Small test area and approved finish |
| What maintenance follows? | A coating may need later reapplication | Written care and recoating instructions |
Frequently asked questions
- Does new block paving have to be sealed?
- No. Marshalls says it does not consider sealing necessary for its block paving. Follow the instructions for the exact paving product rather than treating sealing as compulsory.
- Will sealing stop weeds permanently?
- No treatment makes a driveway permanently maintenance-free. Sealing may help stabilise joints with a compatible system, but debris, airborne seeds, edge growth and damaged joints still need attention.
- Can permeable block paving be sealed?
- Only with a product and method confirmed compatible with the exact permeable system. Marshalls warns that some sealants can clog permeable joints and reduce infiltration.
- Can a second sealer be applied later?
- Possibly, but compatibility with the existing coating matters. The original and replacement product manufacturers should confirm preparation and adhesion requirements before another coat is applied.
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