Securing Hardboard To The Floor

[ZebbyUK]

I'm putting lino flooring down in the kitchen, bathroom and hallway downstairs and because the floor isn't completely level (chipboard, got damp over time, some flooring replaced resulting in some level differences in places) I'm going to place hardboard sheets on the floor.

What I don't want is to have nails work their way loose over time and pierce the lino and screwing the boards down I need to lose the heads of whatever I use so screwing it all down will be a nightmare as I'll have to countersink all the screws which will result in weakening.

I know pallets and nailed together using nails that just don't want to come back out, what are they please? Like little barbs on the nails but I need largish flat heads.

Anyone able to name them please or even have another way of securing the hardboard sheets to the floor?

[mikey4444]

You will need to use long tacks, and use them at 6 inch squares. If I were you, I would also use a countersunk punch, to make sure that any of the heads are not standing proud.

[Togo]

Get yourself a good staple gun.

[Togo]

To be truthful you would be better using 6mm ply and ringshank nails. If you have already purchased the hardboard lay it with the rough side up to prevent the vinyl slipping.

[Togo]

Another thing believe it or not, if you use hardboard.... wet it first and let it dry before laying vinyl. Honest.

[Khandro]

If you must use hardboard I would suggest you use the tempered type which is impregnated with linseed oil;
https://www.andersonplywood.com/416/hardboard/

[Garaman]

B&Q have a video that might be worth watching.

[The Builder]

To be honest, Zibby, I wouldn't even think of using hardboard. It's going to follow the "bends" in the floor and be very uneven.

Go for a flexible floor levelling compound. There are some that can be built up to accommodate a 50mm dip.

Trowel it on to get a perfectly level surface,

[Khandro]

Yes builder, the, "chipboard, got damp over time," made me sigh, but.......