Installing a Livingrooms prefabricated base is simplicity itself, and well within the scope of the average DIY installer. The base arrives already pre-assembled, so all you need to do is dig the foundation pad holes according to the plan supplied and fix the base in position. After the conservatory is complete you can lay the floor insulation and t&G chipboard floor.
Step1. First check that the site of the proposed conservatory is clear, that there are no obstructions and that the site is reasonably level. If access is required to a manhole, or drain, under the proposed conservatory, an inspection hatch will have to be created in the conservatory floor. Check that the house wall is vertical.
If the wall leans out, the conservatory base will have to be packed off the wall. Failure to do this will lead to difficulty fitting walls and frames.
Step 2. Now check that there is enough room below the intended floor level for the floor sections and supports.
A minimum of 160mm is needed (200mm would be better).
If needed remove soil/concrete to desired level. Dig the holes as shown on the foundation pad plan supplied, ensuring that holes are the correct size. If digging into soft ground a post hole digger is useful, if into hardcore or concrete use a breaker.
Step 3. When the holes are dug and the site cleared, slide the 24mm floor bolts into the bottom channel of the floor support sections making sure bolts are in correct position for the holes dug. The top nut should be 10mm below top of the bolt. The washer goes below the floor support.
Tighten the bolts onto the floor support with a 35mm spanner or large adjustable.
Now place the base in position against the house wall.
The top of the backplate should be 98mm below the final floor level, excluding any floor covering.
Check that the backplate is level and mark the position of holes for anchor bolts avoiding mortar joints. Drill the backplate and mark out for holes on house wall.
Now drill 6mm holes in house wall and tighten concrete screws provided to fix to the house wall.
Get the floor level by packing up as needed. Carefully check again that the base is level and square. Check diagonals. They should be the same (it is worth spending a little time on this to ensure that the base is properly aligned). If necessary, pack up under support beams to ensure the base is solidly supported.
Step 5 Fill all foundation bolt holes with concrete ensuring that all holes are properly filled. Now leave overnight.
DO NOT DO ANY FURTHER WORK UNTIL THE CONCRETE HAS SET.
N.B. When installing the frames and roof, it pays to loosely lay a few chipboard sheets upside down to give a working platform and avoid tripping over purlins.
Finally When the conservatory is fully weatherproof, place the foam insulation between floor purlins and lay the damp proof membrane on top, taking care to leave approximately 100mm upstand on all sides. Put clear silicone on inside face of wall and screw on the Fermacell panels.
Now lay the chipboard floor starting at the back (leaving a 5mm gap) and working back using the plan supplied. Mark the position of the purlins so that you can screw the floor down (using 32mm self drilling screws supplied) When complete, trim the dpm with a stanley knife.
Base Installation Instructions