Damp proofing in North Hykeham

The ground under North Hykeham

The town stands on the valley floor south-west of the Lincoln gap, on river-laid sands and gravels rather than the limestone of the ridge above. The clearest evidence is on its doorstep: the flooded former sand and gravel workings around Whisby, just to the west, now a nature park of lakes. Pits dug into this ground fill with water because the water table sits close to the surface, and the same water table sits under the streets.

For homeowners this means two practical things. First, ground moisture is always available, so anything that bridges or bypasses a damp proof course, from raised flower beds to rendered plinths, finds water to carry. Second, sub-floor voids and any below-slab spaces stay humid, so ventilation matters more here than on free-draining ground.

What the housing stock brings with it

North Hykeham's growth tracks the twentieth century. Along Newark Road and the older streets there are interwar and immediately post-war semis; behind them spread estate housing from the 1960s onward; and the town's edges are still gaining new developments. Each generation has its own weak points:

• Interwar and early post-war homes often have early cavity walls with mortar-bridged ties, original steel windows since replaced, and suspended timber floors whose air bricks have been buried by driveway and patio work over the decades.
• 1960s to 1980s estates commonly show condensation after window and insulation upgrades, plus the occasional failed felt flat roof over garages and extensions feeding damp into adjoining walls.
• Modern new builds rely entirely on designed ventilation. When trickle vents stay shut and extractor fans go unused, moisture builds quickly in a tightly sealed envelope, and mould appears within a couple of winters.

The problems the specialist sees most here

• Condensation and black mould in upgraded or tightly built homes, the commonest complaint by far
• Bridged damp courses where garden and drive levels have crept above the original line
• Blocked sub-floor ventilation under older semis, with damp joists as the eventual price
• Penetrating damp from tired rainwater goods on homes now sixty to ninety years old

Covered from Lincoln, minutes away

The vetted specialist covers North Hykeham, South Hykeham and the neighbouring parts of the Lincoln fringe including Bracebridge Heath and Waddington. Send the form or call, describe what you are seeing, and they will arrange an inspection and written quote.