Extend & Renovate | Enervate

By: Enervate  05/12/2011
Keywords: Insulation, ventilation

We do this by using our PHPP (Passive-House Planning Package) software, (which is registered with the Passiv-Haus institute in Darmstadt, Germany). There are a number of ways in which we can improve things.


This involves facing as much glazing to the South as is feasible, to maximise solar gain, helping to heat your home during the winter months. Also we reduce the glazing to the North (unless there are terrific views) which loose heat. We can also incorporate roof-lights, or sun-tunnels in sensitive areas. We look at roof-slopes to see if they can be altered to accommodate solar panels.

Construction methods

We can offer different construction methods depending on your requirements. These include: Insulated foundation systems, timber frame (sustainable) or solid block with external insulation. We do not recommend ‘traditional’ cavity construction because there are a number of reasons why this method is fast becoming a thing of the past. In the roof, we generally recommend changing the rafter depth to 225mm (9 inches) as it is more cost-effective to insulate to a high standard.


By far the most important investment you will make. Euro for euro it is the most effective way to save you money in years to come. Again, using our software to calculate U-values, we are able to accurately specify the most cost-effective ways to insulate your home, and can make compensations for any existing cold-bridging or other heat losses. We also eliminate cold-bridging where possible, to reduce the risk of mould growth. We do not endorse any particular insulation manufacturer (unlike some others) but specify the products that give the best performance to cost ratio.


We look at the methods and systems required to make your project air-tight. Today’s standards are relatively poor compared to what can be achieved. Up to 35% of heat losses can be attributed to unwanted draughts. We use only the best materials to guarantee the best results, which can be verified by a door-blower test prior to slabbing. All of our tradespeople are aware of the consequences of puncturing membranes etc and all work together to ensure that the integrity of the system is not compromised. Chimneys are among the biggest offenders when it comes to heat-loss and draughts, but we have a number of remedies for these also, without losing that ‘real fire’ cosiness that we love so much in this country.

Ventilation & Heat Recovery

It is very important at design stage to consider how it is intended to provide adequate ventilation. Let’s face it, none of us like to shiver beside those ‘hole-in-the-wall’ vents all winter, and that’s why most of them are blocked up by now, causing condensation and mould problems. There are a number of other ways to satisfy building regulations, and to maintain comfort and air quality within the building. The main three are: passive stack ventilation, demand-controlled ventilation and mechanical heat-recovery ventilation. We will design the best solution to meet your requirements (and budget) prior to construction, and using our tried and tested system suppliers ensure that the chosen system is fitted and guaranteed to the highest standards.

Windows and External Doors

We take the guess-work out of choosing what types of units are fitted. Again, we do not endorse any particular manufacturer, but base decisions on the merits of the standard of product. Whether looking for timber-frame or PVC, double or treble glazed, we can get the best results to suit your budget. If required, we can go full-on with Passive-house windows and doors that as yet cannot be manufactured (yet) in this country, and are currently being imported from mainland Europe. In all cases, an air-tight tape is fitted around the inside of the frames as part of the air-tight system (no draughts).

Heating systems. Based on the annual space heat demand of your home (which will be very low, if all of the above are considered carefully), we can accurately calculate the amount of heat you need to keep it warm. We will give you all the options, and steer you in the right direction (away from oil!).

We can bring your project to Passive-House standards!

Keywords: Insulation, ventilation

Other products and services from Enervate


Retrofitting | Enervate

This involves the fixing of insulation to the outside of your house, and then applying a basecoat render, with a layer of fibre mesh and finally a finish coat of render to the colour of your choice. This involves changing your existing oil or gas boiler with a condensing boiler, which uses the fuel much more efficiently, and improving the way in which it is controlled.


Air-tight Systems | Enervate

This ensures optimum protection for all fibrous insulating materials in all constructions, whether they are vapour diffusion permeable or vapour diffusion resistant externally such as pitched roofs with bitumen sheeting or metal sheet roofing, flat roofs and walls with a diffusion resistant exterior cladding.


Services | Enervate

Retrofitting refers to the addition of new technology or features to older systems, in this case older or existing buildings, to improve energy efficiencies. External Insulation, Attic / Roof Insulation, Wall insulation, Cavity Wall Insulation, Internal Dry-lining, Boiler and Heating Controls Upgrade. Have you ever seen a polar bear or a seal with its fur under its skin. Yet most homes and commercial buildings are insulated from the inside.


External Insulation | Enervate

Whether you are planning the construction of a new building or renovating an existing one, Enervate can offer you a durable, cost-effective solution in keeping with the highest standards of the construction industry. Outsulation (External Insulation and Render Systems – EIRS) is a type of building system that provides exterior walls with insulation, finished surface and waterproofing in an integrated composite system.


Low Energy & Passive House Construction

By using more up to date building methods, and paying extreme attention to details, we can bring your house to any energy rating you like, right up to Passive-House standards. We can accurately calculate the space heating demand, and energy consumption of your new home, long before you start building. You will have the comfort of knowing that it is built well, and will be easy to keep warm.


Insulated Foundations | Enervate

Building, literally on three unique properties of EPS; high compressive strength combined with extremely low water absorption and excellent insulating values, the load bearing walls and floor slab of your building sit on top of the insulating layer practically eliminating heat loss to the ground.