Plain stackable support pads can only be altered in height by doubling, tripling in size or by adding shims of a few millimeters.

For roofs built to falls where there are changes in levels by a very small, very large or irregular amount, the ASP range of Adjustable Support Pads are the perfect tool.

More roof and balcony designs incorporate a completely flat upper surface in order to utilise them more effectively as leisure areas.

Wallbarn’s ASP adjustable support pads are ideal as the stems pieces can be wound up and down to compensate for obvious drainage falls which have to exist in any waterproofed deck.

These robust support pads can withstand concentrated loads of 400kg each, and allow high cavities so that pipes, cables and other utility installations can be laid underneath the paving slabs.

The support pads come in four parts: the base plate, a threaded stem, a nut fixing and the head plate complete with positioning lugs.

The nut fixing is simply screwed onto the stem and rotated up or down to change the height. In this way very exact and irregular changes to the deck level can be achieved. The stems have a range of up to 35mm at each size.

Corners and end of runs can be paved easily by removing the lugs from the head plate and simply sliding the support pad beneath the inside edge of the slab.

Alternatively a border edge of washed pebbles can be installed around the edge against the wall or parapet. This is a design favoured by many installers.

Since this is a suspended system, there is an opportunity to hide unsightly objects such as cables, water pipes and even drainage outlets underneath the paving slabs.

The rainwater runs between and under the slabs and can be collected in small water storage tanks placed in the cavity where roof gardens or planters are present. This helps the SUDS design concept (although it will lead to much greater weight on the roof of course).

Slope Correctors
And with the new base level slope corrector, contractors can be assured of completely flat, stable paving.

These wedge shaped levellers clip into the base plate and ensure the slabs do not rock or tilt as the slope is corrected at the bottom, so the force of gravity is still going directly vertical. Therefore the top of the pad is totally flat.

They are available in 3 sizes:

• 1% or 0.57 °
• 2% or 1.11 °
• 3% or 1.71 °

This eliminates the time consuming process of snapping levelling shims into quadrants and trying to get the levels correct.

Please note these slope correctors are available for support pads 50-70mm and higher

Head pieces
Wallbarn can supply a number of headpieces for the ASP range, including:

Also available are lugs for timber joist, used for fixing suspended timber decking. Please see our page marked support pads for timber decking for further details.

Shims

A plastic 3mm shim can also be placed on top of these support pads for additional adjustment or settlement.

Wallbarn adjustable plastic support pads are designed to be used where a very high clearance from the deck is required, or where there may be very fine continuous changes to the level. ASP Adjustable Support Pads are now manufactured with slope correctors for the base plates, so slabs can be laid onto decks built to falls without any tilting or risk of being unstable.