Uneven ceilings
Area of application

Uneven ceilings

Ceiling applications for wedi building board

wedi building boards with a thickness of 20 mm or more are used on ceilings which are extremely uneven. Regardless of how old and dilapidated the old substrates are, you can create clean, even ceilings which offer lasting protection against moisture and insulate the room.
Step 1 Step 1 Use a screwdriver to punch 8 holes (around 5 per square metre) in a wedi building board.
Step 2 Step 2 Then apply dabs of mortar made from flexible medium-bed mortar in line with the hole markings.
Step 3 Step 3 Position the building board on the ceiling; tap it with a rubber hammer and align it. Then drill with a number 8 drill bit through the board and the blobs of adhesive into the ceiling behind. Support the building boards until the adhesive has cured.
Step 4 Step 4 Push wedi Tools dowels through the blobs of adhesive and into the pre-drilled holes but do not hammer them in until the blobs of adhesive have hardened.
Step 5 Step 5 The minimum dowel penetration depth in the load-bearing surface is 35 mm.
Step 6 Step 6 Apply wedi Tools reinforcement tape to all joints.

At a glance

Technical data sheet building board 0.24 MB) Application guidelines wedi building board 0.37 MB

wedi system components

wedi building boards wedi 610 adhesive sealant wedi Tools joint reinforcement tape wedi Tools insulation board washers wedi Tools metal dowel

Note for uneven ceilings

The clots of mortar may not exceed the allowed layer thickness of the mortar.

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