Image credits
Sign – Fotolia_31328491_M tenders – Fotolia_46035752_S Calculator/money – Fotolia_54049754_L Signpost – Fotolia_60502540_XXL Clouds – Fotolia_64531247_XL House slider – Fotolia_70194098_XL Clouds with meadow – Fotolia_76158077_XL Scales with house and money – Fotolia_77936616_XXL Window with condensation – Fotolia_78204978_S Man with glasses – Fotolia_83133910_XL Sky – Fotolia_89879783_XXL Jigsaw puzzle – Fotolia_98088509_L Woman/sky – Fotolia_100757146_XL Made in Germany – Fotolia_101542021_L Woman at a laptop – Fotolia_101835522_XL Sky with a meadow – Fotolia_103635752_XXL Piggy bank with money – Fotolia_104200216_XL Plans with a set square – Fotolia_106631841_S Burglar – Fotolia_107456332_XS Hand – Fotolia_111354682_XL House – Fotolia_111759174_L Magnifying glass – Fotolia_115200464_L Aluminium – Fotolia_116681315_S Woman at the window – Fotolia_117993216_XL Couple on the sofa – Fotolia_119605065_XXL Download – Fotolia_120158754_M mould on the window frame – Fotolia_1276949754_XL Meadow/sky/sun – Fotolia_133485888_XXL Man with a newspaper – Fotolia_134079156_XL Boy with a dog – Fotolia_181454496_XL Man against a blue background – Fotolia_220573693_X Woman in a yellow jumper – Shutterstock_307218569 Architect – Adobe Stock_271244688 Listed building – Adobe Stock_136243641 Child safety latch with dog – Adobe Stock_178827780 Energy efficiency – Adobe Stock_462045975 Hygrometer – Regel-air Becks GmbH & Co. KG Fireplace room – Regel-air Becks GmbH & Co. KG Woman FAQ – Adobe Stock_196168366 Family at the window – Shutterstock_1488920453 Woman at the window, natural ventilation – Adobe Stock_228054585 Chimney sweep – Shutterstock_116554564 Cleaning the vents – Adobe Stock_98255633.