It might look nice but did your builder avoid the most common mistakes while creating your home extension?
Mistake 1 – Excavations & Foundations
The first part of the home extension is usually to with the foundations and you will be surprised to learn that at least 25% of the foundations are not positioned directly under the walls on top. Excavating off center or in the wrong position is quite common and in one particular case I had a builder that excavated for a two room side extension on the wrong side of the line that was set up. His ignorance doubled the cost of the excavations and foundations at the drop of a hat.
Mistake 2 – Damp Proofing Course & DPC Membrane
This part of you home extension is a minor job but of vital importance. If it's done wrong the damp enter the new walls within a matter of weeks and over a year or causes severe damp problems.
On one site I inspected a few years back the builders had used plastic rubble bags to form a damp proofing course instead of using the correct width dpc roll.
Mistake 3 – Extensions Are Rarely Square
The vast majority of home extensions do not have 1 square corner. At least 98% of builders that I have met in the last 30 years did not have a clue as to how to check if the home extension there were building was in fact square to the property.
Mistake 4 – Services in the Floor
Time and time again I have come across copper pipes and electrical cables that are run directly in the concrete floors without any form of insulation or protection. Copper pipes corrode quickly when encased directly in concrete as the cement practically eats the copper. As for the idea of electrical cables running around live within the concrete without any sleeving well that just makes the hair on my neck stand up.
Mistake 5 – Windows & Doors
You might think this is an easy job but once again it is pretty common that the height of windows and doors are often comprised because the height of the floor was laid wrong or the bricklayer made a mistake. Ideally all you should see in a doorway to the garden is the wooden threshold and not a little wall under it. In some cases you do not even see the threshold because the frame was set in too low and this equally is simply poor workmanship.
Mistake 6 – Floor Heights
New floor heights are amazing in the various ways they can be botched. Probably the worst scenario is when they are too high usually resulting in a step up from the main house all because the builder did not drop the ground a bit more when building the extension.
Mistake 7 – Ventilation To The Sub Floor
When you build a side or rear extension to an older property with ventilated sub floors it is … Read More