Using a product known as a Densifier either at time of lay or after unexpected rain can improve surface hardness of most concrete surfaces. Improved wear resistance and longevity will save you a small fortune in the future if done correctly right from the start.
Using high pressure water blasters are an efficient way of removing dirt, grime and stains that have built up over years on your tiles or concrete surfaces. From large carparks to your back deck and pool surround no job is too small.
Producing a neat clean surface is key if you are planning to seal and protect or just bringing the old back to new.