My workshop is a beast, comprising the ‘old part’ built back in the 70’s against and integrated with our neighbour’s house on one side, the other is single skin brick, with a very deep concrete floor.
It’s roofed with galvanised profiled sheets, over which there is a vapour barrier and 18mm ply, topped by a double layer of felt. It’s ‘difficult’ to insulate because of the way the roof’s been supported with RSJ’s and heavy angle iron. That said, I do intend to try to find a way of effecting some thick insulation before next winter.
I should add that I only tend to use this part for welding and hot-metal-working, plus (when there’s no flame involved), it’s where I carry out some woodworking. The only heating used here, thus far, is a small electric blow heater, to stop me from freezing completely.
The ‘new’ part, connected directly to the old part, was built (by me) using heavy/dense blockwork along the back and one end wall, the other wall has been completed in brick. Couldn’t afford to do double skinned walling.
The new roof has been completed using closely spaced 4" x 2" joists with noggins, topped off with vapour barrier, 18mm ply and two layers of heavy felt (as per the old part). This area, some 12’ x 10’, has a very deep concrete floor, sealed and painted with the customary grey floor paint.
The ceiling has been deeply insulated and over-boarded. This part is separated from the old by an insulated partition wall, and forms my metal machine shop housing lathe, milling machine etc., and has the benefit of two wall-mounted convection heaters, totaling 1.5kw. I have to say, surprisingly (to me), there has been very little evidence of either condensation or rust.
Would I prefer to have been able to build the all-singing/dancing fully insulated workshop from scratch, yes, of course. However, being a pensioner with a very careful wife-purse string holder … you get the rest?!
Most of the cost has been financed by ‘selling’ stuff I’ve accumulated (over 40+ years) on EBay, oh and by obtaining ALL the bricks FREE on one or other of the free/gifting websites.
Needless to say, workshops, like many other projects, are never ending. There are always modifications and improvements to be made, such as the construction of an external housing for the extractor system and a welding/brazing and forging booth to name but two.