Marking out a roof for Spanish slate

[@sundayneverends]

Watching this video (dozens of times) gave me the confidence to try and re-slate an old outhouse in my garden. Looks ok so far too.Thank you thank you thank you 🍻

[@stevenrudman7433]

Great video, very informative, a question how do you decide or know what your heal lap will be I know some are 100mm some 75mm what decides this?

[@keithpilkington907]

Hello it depends on the pitch if its a quick pitch as in steep roof the headlamp can be less as rainfall will run off quicker so capillary action is slower also places like Scotland the headlap may be increased as to the amount of rainfall and high winds same towards the coast

[@user-kb3wr1uk7u]

You’re nailing straight through the felt that’s not right I’m a roofer of 40 years experience it’s wrong 😮

[@compassroofingltd]

Shut up😂😂😂😂😂

[@davidchi1277]

I would agree with you but this is Scotland

[@as3cs3]

it doesn't matter -as long as water never reaches the nail-holes @user-kb3wr1uk7u. That's why headlap (and sidelap) are crucial. I worked on a roof in Glasgow where some arseholes had replaced the bottom 20 rows of slates with newer ones and it was leaking like a sieve as there was insufficient headlap. You could see water dripping off all the nails if you went in the loft. I worked on a similar one in Eaglesham where there was less than 1" headlap, In fact it was more like 1cm between the bottom of the slates and the nail underneath

[@dugegg]

I've seen this a lot . Do the roofs not sweat as it's got no space between board and slate??

[@as3cs3]

most roofs have vents in them these days@@dugegg and, believe it or not, the old slate roofs used to have vents built into them. Especially barns and stuff. I had a customer asked me to remove them all 🤔