165x20 metal cutting blade for insulated roofing sheets

[JohnH]

I'm about to re roof my parts storage garage. Its only an old 16'x8' wooden garage. Wood worm or somesuch have attacked the wooden roofing sheets, so they have to go.

I saw @8ob recommendation in this thread https://www.mig-welding.co.uk/forum/threads/what-roof-covering.120575/#post-2042507 which makes a lot of sense to me. I spoke to https://www.southernsheeting.co.uk/ who are down the road from me and ordered what I need. I asked them how one went about cutting the sheets and they said to use a circular saw, which is good as I have an 18v Makita that uses a 165x20 blade, but what I dont have is a suitable blade.

The insulated sheets use a thin steel inner and outer covering. I've searched the internet and I'm now very confused. Can anyone recommend a not too expensive blade. Thanks.

 

[mtt.tr]

I just use an older TCT fine blade.

 

[Pete.]

They cut just fine with an ordinary wood blade (the TCT type). I cut a 8x5m plant room at 4m tall down to 3m tall to re-build it in my garden.

 

[JohnH]

Thanks guys, I've got one or two old blades lying about, so I think thats sorted.

Next question, is there a blade that will cut 1.2mm steel. I need to cut some sheet steel for another project. I cut sheet ply and blockboard using my Makita and would find it really easy if I could cut steel in a similar fashion.

 

[Kram]

1.2mm steel, is a bit thin which I dont think a toothed/jig/circular saw would like.
Bench shear?

https://www.mig-welding.co.uk/forum/threads/bench-shears-lb25.120674/

 

[finyuk2005]

i have a makita 18v metal cutting circular saw, great for roof sheets, or galv tin, i have even done up to 15mm steel with it,
good bit of kit, only thing i dont like about it is the chip collection part is bloody plastic! and thing with cutting metal is it tends to get a bit warm!! so that plastic bit is a bit melty!

 

[JohnH]

1.2mm steel, is a bit thin which I dont think a toothed/jig/circular saw would like.
Bench shear?

https://www.mig-welding.co.uk/forum/threads/bench-shears-lb25.120674/

"bit thin" or thick ?

I do have two different bench shears, which I use for shortish lengths, but I need to cut 3-4 foot lengths, and it would be much easier treating it like wood.

 

[JohnH]

i have a makita 18v metal cutting circular saw, great for roof sheets, or galv tin, i have even done up to 15mm steel with it,
good bit of kit, only thing i dont like about it is the chip collection part is bloody plastic! and thing with cutting metal is it tends to get a bit warm!! so that plastic bit is a bit melty!

The thing I don't like about it is that its a lefty, so it covers me in all sorts.

What blades do you use?

 

[finyuk2005]

The thing I don't like about it is that its a lefty, so it covers me in all sorts.

What blades do you use?

i just use the makita ones it came with,
and yeah those wee bits are hot and sharp and not much fun at all!!
i usually wear a full face shield