However, some of the firms are strive to receive up to 60% of the payment, arguing this with sharp need to purchase at once all consumables: Brick, sand, paintwork materials of excellent quality, stove, wallpaper … depending on what and how they will build.
And if, at the same time, this amount is taken from the total contract value of the structure according to the estimate, then you should think about whether it is necessary to conclude a similar agreement.