Cavity wall insulation. Most homes built since 1920 have a gap between internal and external walls. Filling the cavity with insulating mineral wool and foam means cold air's kept out, and warm air stays in. It can save an average three-bedroom home up to £150/year. We've heard of certain cases where damp has formed after having cavity wall insulation installed, so make sure it's appropriate for your home.
If you live in the greater Houston area, there are over 60 different energy suppliers competing for your business. Many of these providers have websites that are confusing and difficult to navigate, their rates buried in misleading advertising and dense jargon. Who has the time to sort through and keep track of options across all these different sites?

Residential real-time pricing customers pay electric supply prices that vary by the hour. To make a meaningful comparison between variable RRTP rates and RES offers, customers should compare their past electric supply cost savings from the total Electric Supply section of the bill, provided by their RRTP provider, with an electric supply cost savings estimate provided by RESs. Alternatively, customers can compute their average real-time hourly price in cents per kWh (each month the average real-time price is equal to the total of the Electric Supply section of the bill divided by the monthly kWh) to compare with RES offers posted in cents per kWh. Customer should bear in mind, however, that because RRTP rates vary over time, past savings do not predict future savings, but only serve as a guide to compare past performance.
Twenty bucks compared to a $2,000 bill? Not much to write home about, but hey — it’s free money. And, true, you’ll still get some free money when you use less energy, but rewards only really seem reward-y if you're shelling out big bucks. That same Direct Energy plan only yields about $6 in Plenti points per year if you use 500 kWh of electricity each month.
If your monthly use hovers around the 2,000 kWh mark, you’ll be spending around $2,000 per year on electricity bills no matter which REP you choose. With that level of investment, you may be tempted by an offer to get something extra in return — like rewards. Direct Energy is notable because it’s a part of American Express’s Plenti rewards program. For every dollar you spend on your Direct Energy plan, you earn a “Plenti point,” which you can then redeem on purchases with retail partners like Macy’s, AT&T, and Exxon.
Twenty-nine states have deregulated electricity, natural gas or both. That allows you to shop for the supply portion of your bill from alternative providers who may offer rates lower than the default supplier – usually a utility. Delivery services and billing will remain the responsibility of the local utility as they own the power lines and wires that keep the lights on.
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