Posted on

how to prevent weeds growing in block paving

How to prevent weeds growing in block paving

Whilst we have an FAQ section and a helpful expert guide on our website, we thought it would be a good idea to cover some of the most important pointers for professional patio sealing in the quick responses below.

You now need to seal over the block paving to ensure that future weeds don’t grow up between the gaps.

After the sanding is complete, it is advised to seal on the same day, so the sand works alongside the joints as soon as possible.

Is it necessary to seal block paving?

Modern patio sealers offer many different looks and finishes, and at Universeal we offer formulations for all types of paving, including:

The sand itself can help with any moisture build up beneath the surface to prevent a reaction with the sealant. The sand penetrates any excess water and also avoids over contact with the paving block itself. (note: sand is between the block paving, not on top of it – and the sealant is sealing the blockwork primarily and grout lines as a consolidation process).

4. Sealing the gaps

There are many different choices of sealers on the market, some better than others, and some suitable for different results.

That’s why so many customers choose the Universeal range of sealers. Our UK made products are designed to last, are easy to apply, and offer outstanding results each and every time.

How to prevent weeds growing in block paving

Before starting, ensure the block paving is dry and clean. If possible, leave it a few days between cleaning and sealing. This will enable you to check that the cleaning has not produced any efflorescence (crystalline deposits) on the blocks.

Always test the sealant on an inconspicuous area before applying elsewhere, just in case it has an adverse effect. If you can obtain a small sample before buying to carry this out then so much the better.

Finally, when sealing your block paving, ALWAYS wear appropriate protective clothing and footwear.

Preparing the Area

Make sure that traffic is kept off the driveway for 24 hours after sealing and don’t walk on the driveway for four hours, unless the sealer dries before then.

After preparing the surface in question, apply one coat, making sure the whole area is saturated – but avoid creating puddles. Start by pouring the sealant out, then use a pile roller or squeegee to roll it out- unless you have a sealant that can be sprayed.

Choosing the Right Sealant

Once it is dry – it can take up to three hours – apply a second coat. Refer to the manufacturer’s instructions for precisely how much sealant is required per application and whether you need to apply a second coat. The more coats you apply, the glossier a finish you will end up with.

It is crucial to carry out the sealing when the weather is dry to minimise the chance of any moisture build-up within the blocks, as well as surface moisture on top from rain. Aim for some time between May and September to be on the safe side.