Tek Screws v Nails for fixing roof sheets down.

[Bury the Trash]

Every farm should have a bag of those, they're not just good for roofing

agree.
had some of different sizes these

Timco Hex Socket Timber Frame Construction & Landscaping Screws 6.7mm x 150mm 50 Pack - Screwfix

Order online at Screwfix.com. Designed as an alternative to the traditional coach screw, mainly used for timber to timber applications. Coated with a multi-layer corrosion-resistant plating to withstand 1000 hours salt spray test and lubrication designed to enhance screw insertion time. Ideal...

www.screwfix.com

recently they were on offer /clearance they will drive without a pilot hole in thick timber , come with a drill bit, 8mm and some are 10mm hex head.
far better than these old origanal type ones

 

[robs1]

agree.
had some of different sizes these

Timco Hex Socket Timber Frame Construction & Landscaping Screws 6.7mm x 150mm 50 Pack - Screwfix

Order online at Screwfix.com. Designed as an alternative to the traditional coach screw, mainly used for timber to timber applications. Coated with a multi-layer corrosion-resistant plating to withstand 1000 hours salt spray test and lubrication designed to enhance screw insertion time. Ideal...

www.screwfix.com

recently they were on offer /clearance they will drive without a pilot hole in thick timber , come with a drill bit, 8mm and some are 10mm hex head.
far better than these old origanal type ones
View attachment 1164926

We built a new roof over our ex dairy a few years ago, first time I've done a cut roof on my own, I used those sort of screws, not touched a " normal" one since, they are brilliant with a Tex head, can put in loads to support timbers while you create the shape you need with additional braces etc and when it's done take out the braces etc and the screws are ok to reuse, and they pull in really well without ripping the head off.