Will these floorboard cracks be a problem?

[al strachan]

not at all, easy to replace. The old screws are thinner, so all good.

I'd use 5x50 countersunk woodscrews. Screwfix gold are quite good and inexpensive. Get a countersink bit while you are at it.

Goldscrew PZ Double-Countersunk Self-Tapping Multipurpose Screws 5mm x 50mm 200 Pack - Screwfix

Order online at Screwfix.com. Top quality, waxed single thread, multipurpose screw. Popular with the professional. Features a lower screw-in torque and faster drive speed. Suitable for screwdrivers, combi drills and impact drivers. FREE next day delivery available, free collection in 1 minute.

www.screwfix.com

Erbauer Countersink 9.5mm x 65mm - Screwfix

Order online at Screwfix.com. Drills, countersinks and counterbores in one operation. For use with Erbauer Plug Cutter 9.5mm (available separately). FREE next day delivery available, free collection in 1 minute.

www.screwfix.com

You dont even have to replace, just add one next to each drywall screw if you like.

Just make sure you know theres no pipes/wires underneath where you are screwing if going for fresh wood.

 

[Mathew2019]

not at all, easy to replace. The old screws are thinner, so all good.

I'd use 5x50 countersunk woodscrews. Screwfix gold are quite good an inexpensive. Get a countetsink bit while you are at it.

Goldscrew PZ Double-Countersunk Self-Tapping Multipurpose Screws 5mm x 50mm 200 Pack - Screwfix

Order online at Screwfix.com. Top quality, waxed single thread, multipurpose screw. Popular with the professional. Features a lower screw-in torque and faster drive speed. Suitable for screwdrivers, combi drills and impact drivers. FREE next day delivery available, free collection in 1 minute.

www.screwfix.com

Erbauer Countersink 9.5mm x 65mm - Screwfix

Order online at Screwfix.com. Drills, countersinks and counterbores in one operation. For use with Erbauer Plug Cutter 9.5mm (available separately). FREE next day delivery available, free collection in 1 minute.

www.screwfix.com

You dont even have to replace, just add one next to each drywall screw if you like.

Just make sure you know theres no pipes/wires underneath where you are screwing if going for fresh wood.

Thanks alot for your input i appreciate it. My builder seems to be taking shortcuts which is why I'm seeking third party advice. In regards to the hardiebacker boards, do you have any knowledge in the correct application of them? Ie type of screws, priming etc?

 

[Mathew2019]

not at all, easy to replace. The old screws are thinner, so all good.

I'd use 5x50 countersunk woodscrews. Screwfix gold are quite good and inexpensive. Get a countersink bit while you are at it.

Goldscrew PZ Double-Countersunk Self-Tapping Multipurpose Screws 5mm x 50mm 200 Pack - Screwfix

Order online at Screwfix.com. Top quality, waxed single thread, multipurpose screw. Popular with the professional. Features a lower screw-in torque and faster drive speed. Suitable for screwdrivers, combi drills and impact drivers. FREE next day delivery available, free collection in 1 minute.

www.screwfix.com

Erbauer Countersink 9.5mm x 65mm - Screwfix

Order online at Screwfix.com. Drills, countersinks and counterbores in one operation. For use with Erbauer Plug Cutter 9.5mm (available separately). FREE next day delivery available, free collection in 1 minute.

www.screwfix.com

You dont even have to replace, just add one next to each drywall screw if you like.

Just make sure you know theres no pipes/wires underneath where you are screwing if going for fresh wood.

Quick update I've just bought reisser high performance woodscrews cluntersunk 5 x 50, will these be adequate?

 

[al strachan]

Quick update I've just bought reisser high performance woodscrews cluntersunk 5 x 50, will these be adequate?

yup, all good. Definately pilot hole and countersink though
[automerge]1576686006[/automerge]

Thanks alot for your input i appreciate it. My builder seems to be taking shortcuts which is why I'm seeking third party advice. In regards to the hardiebacker boards, do you have any knowledge in the correct application of them? Ie type of screws, priming etc?

over to the tiling Pro's!

 

[Boggs]

See here.

https://www.jameshardie.co.uk/import/Documents/HardieBacker%20Product%20&%20Installation%20Guide.pdf