Screwing hardi backer

[Kyle Knowles]

Now usually I always use my impact driver to drive screws in hardi but I had the idea of getting some collated wood screws for my hilti collated driver and i tell'ya what I'm never goin back I screwdriver down 10 hardi board in about 3 mins flat and u can set the depth so the counter sink perfect I'd recommend if u fit a lot of hardI invest in a hilti SD 5000 and SMD 57 collated attachment u won't regret it

 

[Two-Trowels]

Been doing that too recently with my Bosch 10.8v drywall gun with collated attachment, been using 25mm drywalls to good effect.

 

[smudger85]

Been doing that too recently with my Bosch 10.8v drywall gun with collated attachment, been using 25mm drywalls to good effect.

Do you not find that the dry walls screw heads shear off?? Turbo golds for me.

 

[Flintstone]

Dry wall screws aren't very strong at all

 

[PaulSmith]

4 x 25 Turbo's also.

 

[Kyle Knowles]

Senco make collated wood screws there about 20 quid is per 1000 well worth it

 

[Kyle Knowles]

Look at this on eBay Senco SEN42K25MY DuraSpin Collated Screws Flooring / Wood PH2 4.2 x 25mm Pack 1, | eBay - http://www.ebay.co.uk/itm/331775954031

 

[Two-Trowels]

Do you not find that the dry walls screw heads shear off?? Turbo golds for me.

Left this for a while before replying as thinking about it I had only used the drywalls on ply and on insulation boards but knew I had a bathroom floor to do using hardibacker 6mm - did it today using the drywalls and every screw went in fine with no sheared heads.

 

[AndY mac]

Drywall screws to brittle wouldn't recommend using them to fix anything to a floor. If you screw one straight threw a stick then tap the end with a hammer you'll see how easy they snap.

 

[Dumbo]

Now usually I always use my impact driver to drive screws in hardi but I had the idea of getting some collated wood screws for my hilti collated driver and i tell'ya what I'm never goin back I screwdriver down 10 hardi board in about 3 mins flat and u can set the depth so the counter sink perfect I'd recommend if u fit a lot of hardI invest in a hilti SD 5000 and SMD 57 collated attachment u won't regret it

I'm going to get my makita collated screw gun out again had lots of trouble with it jamming but was told to lube it . Hope it does the trick . Has any body had problems with makita collated screwdriver.

 

[Flintstone]

Left this for a while before replying as thinking about it I had only used the drywalls on ply and on insulation boards but knew I had a bathroom floor to do using hardibacker 6mm - did it today using the drywalls and every screw went in fine with no sheared heads.

I wouldn't use them on any flooring, as said, they snap far too easily.

 

[Two-Trowels]

Yes they do snap, if you hit them with a big hammer

Shear strength isn't great with drywalls (sideways pressure) and most other screws too for that matter, but shear strength isn't much of a consideration on a floor or ceiling as lateral movement sufficient to snap the fixings is practically non existent. They don't seem to have too much trouble holding up ceilings including the heavy weight stuff like fire protection and sound block boards and besides, I doubt you could get the Hardi up very easily once it's been stuck down with rapid set on a suitably primed floor.

The way I see it is there is only the potential for screws snapping if there is LOTS of lateral movement between the original floor and backer boards and that's doubtful when the job is done right.

 

[AndY mac]

Doing the job right starts from using the proper materials for the job in hand. Not only are the drywall screws not spec for the job the are incredibly alkaline sensitive so not only do you have to worry about there strength they have other issues

 

[Flintstone]

Personally I would rather just spend the extra £1 and use the propper screws instead of some brittle cheap ones that are meant for holding up a bit of plasterboard

 

[Kyle Knowles]

I posted a link for collated wood screws there the ones I use

 

[widler]

Doing the job right starts from using the proper materials for the job in hand. Not only are the drywall screws not spec for the job the are incredibly alkaline sensitive so not only do you have to worry about there strength they have other issues

Im curious what issues a alkaline sensitive screw wiuld have , please explain andy

 

[Time's Ran Out]

Me too, me too!

 

[Qwerty]

Galvanization–passivation–synthetic coating
A) Zinc yellow passivated

B) Zinc-plated, transparent passivated (generally termed "bright galvanised, zinc-plated")

1. The application of a zinc layer protects the material of the screw from corrosion and simultaneously gives it a greyish, silver-coloured appearance.

2. The application of a passivation layer to the zinc-plated surface of a screw results (depending on the chemical process used) in a yellowish or transparent coloration of the metal. The passivation of the zinc layer improves the corrosion protection.

3. After the zinc coating and passivating processes, the screws are given a further synthetic coating, which reduces the screwing-in torque required, making the screws easier to use. SPAX with zinc-plated surfaces are for indoor use. They should not be used outdoors or in damp locations.

 

[Qwerty]

This is from SPAX ^^^

 

[AndY mac]

The phosphate coating on drywall screws in my option is not enough for a coating of tile adhesive. Once screwed in and surface scarred they corrode real quick. Only seen proof of this once. Doing a job with my uncle a bathroom floor with a marble tile spots and discoloration on surface. Once we lifted ply had been screwed down with drywall screws rusted out.

 

[widler]

Personally , i think most screws will rust , apart from stainless, in certain environments.
But i get your drift .
Unfortunatly Ive used drywall on outside render jobs screwing beads on for years , with no rust spots ect

 

[Bathfix Bob]

Kyle you really got be thinking with this, recently I bought myself a Bosch 10,8 driwall gun and its totally speeded up be driwalling so I thought why not give it a go with those Senso screws in your link so I bought some. I've used them today but with them being 4.2 gauge the little Bosch cant sink the screwheads so I have to go round with a combi drill. This is still quicker but it would be nice to do it in one go, is it possible to get 3.5 collated woodscrews? If not I will need to get a beefier gun, does the Hilti sink the heads?

 

[Kyle Knowles]

I'm not sure about if u can get 3.5 collated screws but to answer the other question yeah mine drives the screws straight through the hardi and out the back if u have the depth set wrong it's a beast somehow it's more powerful then my impact driver

 

[Bathfix Bob]

I debated for ages about which screwgun to get, I already have Bosch 10.8 stuff and makita 18v.

The makita screwgun had endless people saying it kept jamming which put me off so to save buying into another battery system I got the Bosch 10.8 driwall gun, its just about powerful enough for 3.5 driwall screws but struggles with the 4.2.

I'm thinking now about getting a 240v Bosch drywall gun and using the same collated attachment.

 

[Kyle Knowles]

I debated for ages about which screwgun to get, I already have Bosch 10.8 stuff and makita 18v.

The makita screwgun had endless people saying it kept jamming which put me off so to save buying into another battery system I got the Bosch 10.8 driwall gun, its just about powerful enough for 3.5 driwall screws but struggles with the 4.2.

I'm thinking now about getting a 240v Bosch drywall gun and using the same collated attachment.

I have the bosch 10.8v impact and drill set which is a great little set for day to day use but when it came to drywall guns I joined the plasterers forum and after reading loads of threads everyone with a hilti said they wouldn't go back to senco makita dewalt or bosch so I bought a hilti one and it's never missed a beat

 

[PaulSmith]

What about the Reisser screws. Just ordered a load.

 

[Kyle Knowles]

I like the Reisser screws they provide u with a bit for them that never slips out

 

[Kyle Knowles]

I use my dry wall gun for all screwin job other then insulation board coz of the washers