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Elmhurst Energy Approved Assessors

Elmhurst Assessor Accreditation Scheme Elmhurst’s Accreditation Scheme recognises and approved industry standard qualified energy assessors. SAPS4U are accredited by the Elmhurst Scheme. This ensures that SAPS4U offer reliable and expert technical assessment and are...

When Do House Extensions Need SAP Calculations?

One of the questions we are most frequently asked is ‘when do house extensions need SAP calculations?’  It is a source of great confusion to home owners and builders.  Does any large extension need a SAP calculation?  No.  It depends on the amount of...

Thermal Bridging

I remember seeing a ladies’ sheepskin coat that had no buttons on the front.  The sheepskin coat is one of the warmest winter coats, but only if it is buttoned up. If it is left unbuttoned then it is not as effective. On a cold day you might try and rap it all the way...

Spray Foam Insulation

The advantages of spray foam insulation. Icynene is a form of spray foam insulation. The thermal conductivity of the insulation is about the same as mineral wool. It has the advantage of making the building very air tight. Because of its rapid expansion it has a...

Sheep’s Wool Insulation

What are the pros and cons of Sheep’s wool insulation?   Sheep’s wool insulation is made into rolls and slabs very similar to those made from fibreglass and mineral wool insulation. Rolls of insulation are generally used above flat ceilings and slabs are...

Full Fill Insulation on Sloping Roof

The traditional way to make a pitched roof is to have a waterproof layer under the tiles or slates to prevent water coming in from outside. If the layer is completely waterproof this causes problems with condensation.  A 50 mm air gap is allowed between the top of the...

SAP 2012 No Solar PV or Heat Pumps

SAPS4U believe in getting the job done within your budget. Not everyone building a house can afford to pay for solar panels and heat pumps and not everyone buying a house is used to such things. If you really want the house to pass SAP 2012 without solar panels or...

What is CHP?

CHP stands for Combined Heat and Power. A CHP unit is a heating system fitted with an electrical generator so that it can provide heat and generate electricity at the same time. You might be forgiven for asking why anyone would want to do this. We live in a country...

What is Passivhaus?

Passivhaus is a German word for passive house. The literal meaning of the word is a house that is unheated. Imagine having so much insulation in your house and such good triple glazing that heating was completely unnecessary. The sun rises in the morning, shines in...

Waste Water Heat Recovery

When you take a bath the waste water goes down the plug hole. Obviously this waste water is quite warm. Waste water heat recovery means recapturing the heat from this water. A copper pipe is coiled around the pipe that the waste water travels down. The water in the...