Timber Worktops Installation Guide
Worktop fixing method
Worktops are fixed down using slotted stretcher brackets only, (with slots uppermost and across the grain).
The cross grain slots in the brackets, together with roundhead screws, will accommodate the natural movement of the timber whilst holding the worktop down.
Using typically 2 brackets per end panel on 560 - 570mm deep base units at 500mm centres.
Deeper units will require more brackets.
Set out the worktop so that it has a 4 - 5mm expansion gap between the rear edges and the wall surface.
If upstand is used then this is used along the rear edges only and will add 10mm to the depth.
Bracket fixing
Fit the brackets to the base unit side panels only. Top rails are not strong enough.
On cabinets that have a full or partial top panel, fix the brackets directly under the panel, having first drilled access holes, which are a minimum of 15mm diameter, through the unit top to line up with the cross grain slots in the brackets.
Use 35 - 38mm Roundhead screws to fix through the bracket and unit top into the timber. Obviously use shorter screws on 27mm thick worktops.
Note: These top panels must be drilled or cut out over at least 60% of the area to allow the underside of the timber worktop to breath and stay in balance with the upper surface.
Cupped Worktops
If a timber top is cupped, due to moisture differences on site between the opposite surfaces of the wood, it should be fixed down through the rear brackets first.
Then gently and gradually, using clamps and battens, pull it down at
the front before fixing it there with screws.
Allow time for the
timber surfaces to equalise and flatten, otherwise the timber may split.
Above Kitchen Appliances
Where the tops span appliances alone, or are unsupported into the corner, cut and fix timber wall rails to support the tops and attach the slotted brackets.
Tops that span two appliances side-by-side must be supported:
-either by a mid panel fixed between them.
- or by a solid timber front rail at least 40mm high and fixed across the span.
Onto Masonry Features
Do not fix wooden tops directly into masonry.
Fit them over timber spacers 6 - 10mm thick, which are on a Damp Proof Membrane (DPM).
This prevents the transmission of moisture and provides airspace under the top.
Sealing Corner Joints
Make sure any end grain has been sealed before assembling the joints.
Apply a light bead of clear low modulus silicone sealer along one side of the joint, just below the top surfaces and edges.
Align the two sides with biscuits before clamping up firmly with worktop bolts. Wipe off any surplus sealant.
Move the tops into place. Use thin pieces of board as temporary packing to position them with 4 - 5mm expansion gaps between the edges and ends of the tops and the walls.
Once your Timber Worktop is installed, consult with our Care & Maintenance Guide for advice on how to get the best out of your worksurface.
Click here to download the guide in PDF form (Right Click then "Save Target As".
