Penwin Windows and SidingMaryland Home Improvement Specialists  (301) 296-8444

Professional Installation of Windows and Doors

At Penwin, we pride ourselves at providing our windows, doors and siding clients with great service. If it’s doors, windows or siding your home needs, we can definitely accommodate you. Just fill in the form below, then click submit and we’ll be happy to give you a free quote. Penwin is a company set on customer service period. We have over 100 years of experience in the home improvement arena. Reliability is the most troubling part of our industry. Can you trust your contractor? Will they do what they say? Will I be happy? All of these questions lead to so much uncertainty. With Penwin, you can rest assured you are safe and secure. Quality Home Improvement does not have to cost a fortune!

New Windows


Home Siding




Concerned about energy bills and need new windows? Underperforming windows can drive up your bills dramatically. As the thermostat in your home fluctuates, the HVAC unit works overtime, throwing away your money. Older windows also allows in the elements to enter into the walls of your home. Mold and other allergens can form causing serious health risk. We have seen it more than once.

The team at Penwin has years of experience in the vinyl, wood, metal and fiber replacement windows. We have over five different manufactures waiting for your selection. Concerned about vinyl window replacement cost? No one beats our price period. Survivor, Simonton, Thermatru, Soft-Lite, and Penwin Windows own HP3 collection. We are concerned with your needs. One type of window can never satisfy all customers. Penwin has you covered. We offer the best installation bar none.

We used the best caulk, foam for the cracks, and a specialized interior caulking for get rid of that strong window installation smell. We care about your safety. Our installers are AAMA certified, and they all have lead certification from the EPA. Penwin Home Improvement began as a window and door company, even though we currently offer many other services. When you become part of the Penwin family, you will receive fair treatment and a quality price. There is no game playing or dishonesty. You will receive the best pricing and quality workmanship. Our technicians will arrive on time at your home and treat your home like it deserves. In many cases, your home project may require new gutters to replace those that are worn out and showing the effects of the elements.

We select high-quality gutters that accent the colors of your home’s exterior. We install Vinyl siding installation can do more than make your neighbors stare; it can also save you money.

(240) 650-0676

CertainTeed is our primary siding company and partner. CertainTeed insulated siding, house wrap, foam insulation – will reduce heating and air conditioning bills  Everybody can stand to save a few dollars! When you think of a door you think of security, beauty, quality installation and quality. All of these things you can acquire for an excellent price form Penwin. The windows and doors are the first thing you notice when you see a home. It is the portal to your most prized possessions. We stock the safest, secure and long lasting doors in the industry. No more painting yearly and caulking to stops leaks and drafts. We are going to equip your family with the most technical advances doors in the industry for a reasonable price. Let your dreams of tomorrow start today. Call Penwin!