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Summary: How to fix to Thermalite, Durox and other lightweight blocks

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Fixing to Thermalite, Durox and other lightweight blocks really requires special fixings which can grab the block from inside the hole you drill. Plugs and fixings that expand as you screw the fixing into the plug tend to break away the inner surface of the hole and become loose in no time at all. Proprietary fixings can be bought in most DIY Stores and they will be labelled, Fixings for Lightweight Blocks or fixings for airated blocks.

The procedure is pretty much the same as when fixing to normal concrete or masonry. A hole of the diameter stated on the fixing is drilled and the Lightweight block fixing is inserted, but with these they are screwed in, not just pushed in as you can see from the images below. Most lightweight block fixings come with a special tool which allows you to screw the fixing into the block firmly with the help of a battery driver.

Drill hole in block Push in fixing Tighten fixing Complete

Top Tools

Click on a tool below for additional information.

Cavity Fixings Selection Kit	DeWalt DC756KA 12V Drill Driver	DeWalt Screwdriver Bit Set 29Pc	Fischer Original Nylon Plugs 6 - 8mm Pack of 50
Fischer Plasterboard Plugs HDF 4mm (8ga) Pack of 100	FloPlast ABS Access Plugs White 32mm Pack of 5	Wall Plug Blue 6 - 8mm Drill Diameter 10mm Pack of 100	Wall Plug Red 4 - 5mm Drill Diameter 6mm Pack of 100

Much more construction information is available in our bookstore. All the tools and fittings you need in the toolstore.

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Fixing to walls problems
	-> Fixing to walls problems

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