Lean-to Roof

[caretaker]

I will be starting on my lean-to roof soon and would like any comments on the way I will tackle it.
First job will be to take off the old roof as it leeks badly.
I am going to fix new rafters running from the house wall down to the garden.
The lean-to is 3 meters wide and 3.5 meters long.
On the rafters I am putting tongue and groove planks running across from the house wall and then work my way down to the garden.
I am doing it this way as Wickes sell T & G at only 3 meter lengths. (joints will run cross ways).
Will run wood glue in T & G joints and screw down on to rafters.
On top of wood I will put felt, (2 rolls) will cover I hope.
I could run the planks down ways with joins but will need lots of but joining that way.
Any comments or tips please.

 

[Random Orbital Bob]

why tongue and groove? Do you want the ceiling to look "pretty" from inside the building looking up? It's just that a decent sheet goods (like OSB) will overcome many of the problems related to wood movement and risk of water penetration with t&g. Also faster/easier to fit and a lot cheaper. OSB is a wood chip and resin based sheet good that comes in 8x4 sheets and is the ideal material for such a job but it looks hideous hence my question about decorative finish. If you do use t&g you should avoid gluing the joints as they'll just split when the moisture content changes seasonally, again increasing your risk of water ingress.

 

[RobinBHM]

By a lean to roof, do you mean a flat roof with a slight fall?

I would make it a warm roof by fitting celetex on the rafters (or in between and on top if space is limited), then OSB3 board or sheathing ply.

I dont think I would use T and G for a roof deck.

 

[Wildman]

gluing T&G presents a nightmare when the day comes to replace part of it.

 

[caretaker]

I was thinking T & G as it would look good from inside, if I do not use wood glue but use a sealant just to help to make it more water resistant ?
As for OSB3, I would struggle with the size as I'm over 70, but think I can manage the T & G boards with a little help from my wife.

 

[Roughcut]

I was thinking T & G as it would look good from inside, if I do not use wood glue but use a sealant just to help to make it more water resistant ?
As for OSB3, I would struggle with the size as I'm over 70, but think I can manage the T & G boards with a little help from my wife.

Could you not get an able friend/relative to give you a hand for a couple of hours?
As I agree with what others are saying on using OSB or Plywood for the deck.
It will be much quicker to fix in place also than t&g boards.

 

[n0legs]

The movement in T&G for a roof will be huge. I had a vaulted ceiling in a conservatory/sun lounge and 18 months later it was covered with mdf and painted. It did look lovely........ for all of a fortnight.

 

[caretaker]

I finely have finished my lean to roof, I used 3 sheets of OBS, wood glue, screws, felt and sealer, new rafters lots of white paint for the inside.
Now I have carpeted the in side new breakfast bar, new seating.
The good news is it don't leak any more.
Ok I admit my brother in law helped, no I helped him as I can not get up a ladder to good now.
Thanks Eddie.