Sprays

Spray protection systems, shown below, have decreased in popularity in the past decade, despite being one of the cheapest forms of fire protection in terms of application costs.

 

The principal advantages are:

Cost - spray protection can usually be applied for less than the cost of the cheapest board. Because the cost of sprayed material is low compared to that of getting labour and equipment on site, costs do not increase in proportion to fire resistance times.

Application - it is easy to cover complex details.

Durability - some materials may be used externally.

Surface preparation - some materials may be applied on unprimed steelwork.

The principal disadvantages are:

Appearance - sprays are not visually appealing and so are usually used only where they are not visible.

Overspraying - masking or shielding of the application area is usually required on-site.

Application - is a wet trade, this can have significant knock on effects on the construction program with the result that the real cost of spray protection may be higher than that assumed using the application costs only.