Clips are available in different sizes according to various air humidity ranges. The clip size is selected primarily on the basis of the expected maximum relative humidity in the building during the course of the year.

For residential and commercial floors typically applies as indicated in Table 2, but be aware of:

• Larger areas : In order to minimize the overall movements of larger floors and allow for varying RH in different types of buildings, it may be necessary to choose a larger clip than the one corresponding to the expected maximum RH.
• Commercial buildings: The relative humidity in office buildings, shops and similar can deviate from that in residential buildings, thus requiring a different clip size.
• With all clip sizes there will always be gaps when the relative humidity falls to, or below, the lower end of the recommended range.

Table 2

**In a very dry environment there will be some larger permanent gaps between the floorboards. Specifiers are advised to contact Junckers Technical department if such conditions are anticipated.

Number of clips required for 14 and 22 mm 2-strip:
Residential: 13 clips/m2 (clip spacing 700 mm).
Commercial: 17 clips/m2 (clip spacing 500 mm).

Number of clips required for 15 and 20.5 mm Plank:
15 x 129 mm: 17 clips/m2 (clip spacing 500 mm).
20.5 x 140 mm: 16 clips/m2 (clip spacing 500 mm).
20.5 x 185 mm: 13 clips/m2 (clip spacing 500 mm).

Number of clips required for Shipsdecking:
129 mm floorboard width: 17 clips/m2 (clip spacing 500 mm).
20.5 x 140 mm: 16 clips/m2 (clip spacing 500 mm).
20.5 x 185 mm: 13 clips/m2 (clip spacing 500 mm)