Hello all,
This is my first post of my own. I apologies in advance as it is very heavy with questions!
I've been following much of the great builds and general information here. I'm in the process of planning a 'lean to' extension to the side of my existing double garage to be used as a workshop for woodwork and light metal work (both as a hobby).
Here’s a view of what I have in mind. It’s a lean to cavity wall insulated building attached to the existing brick double garage with an outer leaf of matching brick.
The workshop is the side of the garage facing the house. The width (door side) is approx. 4metre, the depth approx. 5.6m, the height approx. 2.5m to fit under the existing roof. The floor area will be just less than 20sqm. Noe if this project past the front line of the main house. The door I’m thinking of is an insulated asymmetric opening side hinged garage door so I have a ‘normal’ side door and the option to of a wider opening.
I have some questions for the experts here:-
I have no plans to convert it to living accommodation. Am I right in assuming it doesn’t need planning approval or to build to building regs?
Having said that I want it to be reasonably well insulated.
How would I best treat – insulate and finish - the existing brick wall which will become enclosed by the new construction?
I have the room to increase the 4m width to retain 20sqm floor space so I could have a brick facing 100mm cavity partial filed with Kingspan Kooltherm K106 Cavity Board or similar, 100mm lightweight block – fair faced and painted. I’ve had a reasonable quote for this and the builder doesn’t think going timber frame with brick outer would save much, but may allow a thinner overall wall with similar U value. What are your views on this?
I intend to have a concrete raft foundation with insulation over raft.
Should I go for an elaborate raft as in Blackswanwood’s superb and lovely looking build viewtopic.php?f=35&t=4917&hilit=brick
Or something simpler?
I’d consider electric underfloor background heating or IR heating panels but I think the ceiling height might be too low for the latter.
Flooring – if using electric underfloor background heating. Ideas?
Sorry for all he questiuon, but i'd appewciate some feedback.